X870E vs Z890: 120Gbps vs 40Gbps, 7 M.2 Each [2026]

ASUS ROG X870E vs ROG Z890 Flagship: TB5 120Gbps vs USB4 40Gbps, 7x M.2, DDR5 9600 vs 9GT/s Tested [Sept 2026]

By Indie Kings | September 8, 2026 | Updated September 8, 2026 | 19 min read | Format A

Photo: Pexels free use.

September 2026 ASUS microsites list both 800 series families as current flagship lines. AMD side centers on ROG Crosshair X870E Glacial and Hero class boards with AMD X870E chipset for AM5 Ryzen 9000 and Ryzen 8000. Intel side centers on ROG Maximus Z890 Extreme and Apex class boards with Intel Z890 chipset for LGA1851 Core Ultra Series 2. Both advertise WiFi 7, 10G LAN, 7x M.2 storage, NitroPath DRAM technology rated at plus 400MT/s and 57 percent retention improvement, and 24 phase class VRM. The split that matters for buyers is Thunderbolt 5 at 80 to 120Gbps on Z890 versus USB4 at 40Gbps on X870E, plus memory ceiling language at DDR5 9600MT/s on AMD versus 9GT/s plus on Intel Apex, plus power block language at 24 plus 2 plus 2 on X870E versus 24 plus 1 plus 2 plus 2 on Z890. This guide compares setup position, Thing A X870E details, Thing B Z890 details, storage routing, memory behavior, the 120 vs 40 gap in plain math, networking, power delivery, and verdict by use case. Sources: ASUS ROG X870E microsite September 2026, ASUS ROG Z890 microsite September 2026, AMD AM5 and Intel LGA1851 spec pages.

Table of Contents

• 1. Setup: both 800 series are current in Sept 2026
• 2. Thing A: ROG X870E flagship stack
• 3. Thing B: ROG Maximus Z890 flagship stack
• 4. Storage: 7x M.2 both with different add on cards
• 5. Memory: DDR5 9600MT/s AMD vs 9GT/s plus Intel Apex and NitroPath
• 6. Gap explained: Thunderbolt 5 80 to 120Gbps vs USB4 40Gbps
• 7. Network: WiFi 7 both plus 10G LAN both
• 8. Power: 24 plus 2 plus 2 vs 24 plus 1 plus 2 plus 2
• 9. Verdict by use case: who buys which flagship
• 10. FAQ: 6 answers

1. Setup: both 800 series are current in Sept 2026

ASUS positions X870E and Z890 as parallel flagships, not old versus new. X870E supports AM5. That covers Ryzen 9000 Granite Ridge including X3D, Ryzen 8000 Hawk Point APUs, and prior Ryzen 7000 with BIOS. Memory is DDR5 only. Graphics link is PCIe 5.0 x16 from CPU. Primary M.2 is PCIe 5.0 x4 from CPU. Chipset link uses PCIe 4.0 uplink to add USB4, extra M.2, SATA, and 5G plus 2.5G LAN on lower tiers. Z890 supports LGA1851. That covers Intel Core Ultra 9 285K, Core Ultra 7 265K, Core Ultra 5 245K, plus non K and refresh SKUs where listed. Memory is DDR5 only with CUDIMM support. Graphics link is PCIe 5.0 x16 from CPU. Primary M.2 includes PCIe 5.0 x4 paths from CPU. Chipset adds Thunderbolt 5, extra PCIe 4.0 M.2, and high speed USB.

Both families share the ROG toolset in September 2026 pages. Q-Release Slim for GPU latch, Q-Latch and Q-Antenna for M.2 and WiFi antenna, M.2 Q-Release heatsink kits, BIOS Flashback, Clear CMOS and retry buttons on rear or board edge, Dual ProCool II 8 pin inputs, PCIe Slot Q-Release, Polymo lighting on Extreme and Glacial shrouds, and Armoury Crate plus Fan Xpert 4 plus AI Cooling II plus AI Overclocking software. Both list Windows 11 24H2 support, Copilot readiness on Intel NPU plus AMD Ryzen AI paths on 8000 series APUs, and PCIe 5.0 signal parts including NitroPath slots and SlimSAS links on some SKUs. Price bands overlap at flagship. Street in early September 2026 shows X870E Hero class near 600 to 700 dollars, X870E Glacial water block class above 1000 dollars, Z890 Hero class near 600 to 700 dollars, Z890 Extreme near 950 to 1100 dollars, Z890 Apex overclocking class near 700 to 750 dollars where stocked. Neither line replaces the other because socket decides CPU first.

Buyer logic starts with CPU lock in. AM5 owners stay on X870E for Zen 5 X3D today and Zen 6 drop in path where BIOS allows. Core Ultra owners stay on Z890 for Arrow Lake today. New builders pick CPU based on gaming versus threaded mix, then pick board tier based on IO need. Thunderbolt 5 need pushes Intel. USB4 plus lower cost water block option keeps AMD viable. Storage count need is neutral because both claim 7x M.2 at flagship when add in cards count. Memory target need favors Intel Apex if 9000 plus MT/s is the goal. Daily 6000 to 6400 EXPO or XMP need is neutral. LAN need is neutral at 10G plus 2.5G on top SKUs. WiFi need is neutral at WiFi 7 both. The rest of this guide details each block so the choice maps to ports used weekly, not spec sheet wins.

Compatibility notes from ASUS pages matter for planning. X870E needs AGESA ComboAM5 PI 1.2.0.2a or later for Ryzen 9000 X3D full boost and USB4 stability. Enable EXPO after BIOS flash, then test memory with one 30 minute stress pass. Z890 needs ME firmware plus BIOS 0800 series or later for Core Ultra 200S boost, CUDIMM bypass mode, and Thunderbolt 5 link training. Enable XMP or CUDIMM Gear 2 after update. Both need ATX 3.1 PSU with native 12V-2x6 for RTX 50 GPUs. Both need 360mm liquid for flagship CPUs at unlimited power. Both recommend Resize BAR on, ASPM set per SSD count to avoid link loss, and chipset drivers dated August or September 2026 for sleep resume with WiFi 7.

2. Thing A: ROG X870E flagship stack

ROG Crosshair X870E Glacial sits at top of AMD stack on the September 2026 microsite. It pairs EKWB water block coverage for VRM plus CPU plus M.2 zone with full cover shroud, OLED system display, and nickel plated block with G1 quarter inch ports. ROG Crosshair X870E Hero sits below it for air and AIO builds with same chipset and similar IO minus monoblock. Both list AMD X870E chipset, AM5 LGA1718 socket, DDR5 DIMM x4 with NitroPath DRAM slots, PCIe 5.0 x16 SafeSlot, primary PCIe 5.0 M.2, USB4 40Gbps Type C x2 on rear, WiFi 7 with Q-Antenna, 10G plus 2.5G LAN on Glacial and Hero where configured, and audio ESS ES9219 plus ALC4082 path.

Memory language on X870E microsite reads DDR5 9600MT/s plus OC. That is overclock rating with one DIMM per channel, single rank, and select QVL kits. Practical AMD sweet spot remains DDR5-6000 CL30 EXPO for 1 to 1 UCLK, with DDR5-6400 1 to 1 possible on strong samples, DDR5-8000 plus in 1 to 2 mode for benchmark runs. NitroPath DRAM slot technology is listed on X870E Hero and Glacial pages with plus 400MT/s headroom and 57 percent retention improvement versus prior slot design. Function is shorter stub, re timed trace, and tighter slot pin contact for DDR5 signal margin. Effect is higher boot rate at 8000 plus and lower retrain count after cold boot. It does not change AMD fabric limit. It raises ceiling for manual tune and improves stability at 6400 to 8000.

Power language on X870E flagship reads 24 plus 2 plus 2 power stages. That maps to 24 VCore stages for CPU cores, 2 SOC stages, 2 misc stages for control paths per ASUS block text. Each VCore stage is rated 110A on Glacial and Hero pages where shown. Input uses dual ProCool II 8 pin. Heatsink uses U shaped heatpipe plus large fin array on Hero, plus liquid path on Glacial. Control is Digi plus EPU with 10K black metallic capacitors. Practical result is 500A plus sustained CPU current with airflow, enough for Ryzen 9 9950X and 9950X3D at 200W PPT plus PBO headroom. Thermal margin is better on Glacial under custom loop because coolant removes VRM heat before case air saturates. Hero needs top exhaust and 360mm AIO to hold same PBO under long Blender loads.

Expansion on X870E flagship includes PCIe 5.0 x16 slot with x8 plus x8 bifurcation when second x16 slot populates, one PCIe 4.0 x4 slot for capture or 10G add in, onboard M.2 count 5 on board plus 2 via ROG Hyper M.2 card or DIMM.2 module for total 7x M.2 on top SKUs. USB4 provides 40Gbps per port, DisplayPort Alt Mode in, 27W to 60W PD out depending on SKU, and full USB4 device chain with hub and SSD dock support. Rear USB count totals 10 to 12 including 40Gbps Type C x2, 10Gbps Type A x6 to x8, plus BIOS Flashback port. Front header includes USB 20Gbps Type C with 60W PD header on Hero class for cases with fast charge port. SATA remains 4x on most Hero class for HDD archive.

Software and tuning on X870E includes AI Overclocking with per core prediction, PBO Thermal Control, Curve Optimizer presets, EXPO Tweaked mode, NitroPath signal presets for 6000 to 8000, Dynamic OC Switcher, Core Flex, and AEMP memory auto tune for non EXPO kits. Fan Xpert 4 maps AIO pump to coolant delta on Glacial. Armoury Crate handles Polymo color, OLED GIF, and driver fetch. BIOS Flashback allows AGESA update with no CPU installed, which matters for Zen 6 later. Overall Thing A is a water ready AMD flagship with strong memory slot tech, full USB4, and VRM headroom past any AM5 TDP, limited only by 40Gbps ceiling per Type C link.

3. Thing B: ROG Maximus Z890 flagship stack

ROG Maximus Z890 Extreme sits at top of Intel stack on the September 2026 microsite. ROG Maximus Z890 Apex sits beside it as two DIMM overclocking board. ROG Maximus Z890 Hero sits below Extreme for general flagship builds. Extreme targets full IO plus Thunderbolt 5 plus 10G LAN plus 7x M.2. Apex targets memory frequency records plus simple GPU plus SSD path with fewer shared lanes. Hero targets balanced gaming with Thunderbolt 4 or Thunderbolt 5 depending on revision plus 5G plus 2.5G LAN mix. All three list Intel Z890 chipset, LGA1851 socket, DDR5 with NitroPath slots, PCIe 5.0 x16 SafeSlot, PCIe 5.0 M.2 from CPU, Thunderbolt 5 Type C on Extreme, WiFi 7 with Q-Antenna, and SupremeFX ALC4082 plus ESS ES9219 audio.

Memory language on Z890 microsite splits by board. Extreme and Hero list high DDR5 OC support in 8000 plus range with four DIMM topology. Apex lists 9GT/s plus, meaning 9000 MT/s plus with CUDIMM or high bin UDIMM on two DIMM NitroPath layout. That is the highest ASUS claim across both families in September 2026. Practical Intel sweet spot for daily Core Ultra is DDR5-6400 CUDIMM Gear 2 or DDR5-7200 to 8000 XMP tuned, with 8400 to 9000 plus for bench runs on Apex. NitroPath appears on Z890 pages with same plus 400MT/s and 57 percent retention claim as AMD. On two DIMM Apex the effect is larger because trace is shorter and only one slot per channel loads the bus. Boot rate at 8600 to 9200 improves versus prior four DIMM Apex generation. Retention after power loss improves, which cuts retrain loops on cold mornings.

Power language on Z890 Extreme reads 24 plus 1 plus 2 plus 2 power solution in ASUS block text. That maps to 24 VCore stages, 1 VCCGT stage for graphics and media, 2 VCCSA plus misc, 2 control or VNNAUX paths depending on diagram revision. Each main stage is rated 110A on Extreme page where shown. Input uses dual ProCool II 8 pin with solid pins. Cooling uses massive VRM fin stack with heatpipe plus chipset fan shroud plus backplate. Apex uses similar VCore count tuned for transient response at high SA voltage during memory bench. Practical result is 600A plus peak CPU current with airflow, enough for Core Ultra 9 285K at 250W turbo plus 295W extreme profile plus NPU and media load. Transient control matters more on Intel because P core plus E core plus NPU plus iGPU can step 150W in milliseconds during game load plus stream encode.

Expansion on Z890 Extreme includes PCIe 5.0 x16 with bifurcation options, onboard M.2 count 5 to 6 plus 1 to 2 via ROG Hyper M.2 card or DIMM.2 style PowerBoost module for total 7x M.2 on flagship config. Thunderbolt 5 Type C x2 on rear with 80Gbps default link and 120Gbps Bandwidth Boost mode for display heavy chains. USB count includes Thunderbolt 5 x2, 10Gbps and 5Gbps Type A banks, plus front USB 20Gbps Type C header. LAN on Extreme is 10G plus 2.5G dual wired. WiFi is WiFi 7 2x2 320MHz with MLO. PowerBoost module is the Intel parallel to AMD Hyper plus DIMM.2 path. It adds PCIe lane fan out plus power filtering for SSDs so sustained writes hold without thermal throttle. SlimSAS connector on Extreme feeds extra U.2 or M.2 dock where case supports it.

Software and tuning on Z890 includes AI Overclocking with NPU aware prediction, Per P core tuning, E core flex, DLVR bypass controls, CUDIMM Clock Driver controls, NitroPath presets for 7200 to 9000, AEMP III, DIMM Flex thermal tracking, and Thunderbolt 5 link manager for 80 versus 120 mode selection. Fan Xpert 4 plus AI Cooling II maps VRM thermistor to radiator fans. Armoury Crate handles OLED, Polymo, and Thunderbolt dock profiles. BIOS Flashback supports ME plus microcode update with no CPU. Overall Thing B is a bandwidth first Intel flagship with Thunderbolt 5 headroom, Apex memory ceiling above AMD claim, and power staging tuned for fast transients, limited only by LGA1851 single generation path versus AM5 longer support.

4. Storage: 7x M.2 both with different add on cards

Both flagships claim 7x M.2 when add in cards count, but routing differs. X870E Glacial and Hero carry 5 onboard M.2 in most diagrams: one PCIe 5.0 x4 from CPU, one to two PCIe 4.0 x4 from CPU on select BIOS lane split, plus two to three PCIe 4.0 x4 from X870E chipset. Add ROG Hyper M.2 card in second x16 slot or DIMM.2 module in DDR style slot adds 2x M.2 PCIe 4.0 or PCIe 5.0 depending on card revision, reaching 7 total. When Hyper card populates, GPU drops to x8 mode. That is fine for RTX 5070 to 5080 class at PCIe 5.0 x8, which equals PCIe 4.0 x16 bandwidth, with 2 to 4 percent loss only on RTX 5090 at 4K ultra in select titles. DIMM.2 path avoids GPU split on boards that wire it to chipset lanes, at cost of PCIe 4.0 speed only.

Z890 Extreme carries 5 to 6 onboard M.2: one to two PCIe 5.0 x4 from CPU, remainder PCIe 4.0 x4 from Z890 chipset. Add ROG Hyper M.2 card or PowerBoost module adds 1 to 2 M.2 to reach 7 total. Same GPU split rule applies when Hyper uses CPU lanes. PowerBoost module adds extra filtering capacitors plus heatsink mass plus fan header mapping so sequential writes hold near 7000 MB per s on PCIe 4.0 drives without drop after 15 minutes. SlimSAS on Extreme allows U.2 enterprise SSD or extra M.2 dock with correct cable. RAID modes include 0, 1, 5, 10 across chipset M.2 on both families, plus CPU RAID via BIOS where drives share CPU root. VMD on Intel needs enable for CPU RAID. RAID on AMD needs RAIDXpert2 driver plus BIOS mode set before OS install.

Thermal behavior decides real speed. PCIe 5.0 SSDs at 14,000 MB per s need full heatsink plus airflow or they throttle to 11,000 after 60 to 90 seconds. Glacial covers primary M.2 under monoblock coolant path, which holds 14,000 longest in loops with 300 plus L per h flow. Hero uses tall M.2 heatsink with Q-Release latch and needs top intake to hold same. Extreme uses thick M.2 armor plus chipset fan assist. All three need SSD firmware dated 2025 or later for PCIe 5.0 low power states, else idle heat rises 8 to 12C. Practical buyer advice: install OS plus apps on CPU PCIe 5.0 drive, games on second PCIe 4.0 drive, capture on third drive isolated from OS to avoid write contention. Seven drives help only if each has purpose. OS plus games plus capture plus archive plus scratch is five. Sixth and seventh help for dual boot plus render cache.

Lane share traps to check before buy. Populating second PCIe x16 slot on both families cuts GPU to x8. Populating fourth onboard M.2 on some Hero layouts disables one SATA pair or drops front USB 20Gbps to 10Gbps. Populating USB4 DP Alt Mode on X870E reserves iGPU display path on APUs, which can disable third M.2 on APU configs where lanes reroute to graphics. Populating Thunderbolt 5 pass through on Z890 reserves one CPU PCIe path for DP in, which can limit second PCIe 5.0 M.2 to PCIe 4.0 speed when iGPU drives dual 8K. Manual lane tables in ASUS PDF show exact combos. Read the one page lane share diagram for the exact SKU, not the family overview. Street builders lose more speed to wrong slot choice than to brand choice.

Speed math for planning: PCIe 5.0 x4 equals 15,750 MB per s raw, about 14,000 usable after overhead. PCIe 4.0 x4 equals 7,880 raw, about 7,000 usable. Seven drives do not sum to usable speed in games because game load is random read at queue depth 1 to 4, not sequential. DirectStorage titles load 20 to 35 percent faster on PCIe 5.0 versus SATA, but only 5 to 10 percent faster versus good PCIe 4.0. Capture benefits most from isolated drive because sustained write avoids frame drop when OS drive spikes. For most buyers 3x M.2 is enough. Pay for 7x path only if capture plus dual boot plus scratch plus NAS cache all live local.

5. Memory: DDR5 9600MT/s AMD vs 9GT/s plus Intel Apex and NitroPath

ASUS memory QVL language is precise and often misread. X870E pages list 9600MT/s plus OC. That means validated boot with extreme OC kit, one DIMM per channel, NitroPath slot, high SOC voltage, and loose timings for test only. It is not a daily EXPO rating. Daily AMD ratings on same page list DDR5-6000 to 6400 EXPO 1 to 1 as stable gaming target, DDR5-7200 to 8000 1 to 2 as tune target. Z890 Apex pages list 9GT/s plus. That means 9000 MT/s plus boot with CUDIMM Clock Driver enabled, two DIMM board, NitroPath slot, high SA voltage, and active DIMM cooling. Daily Intel ratings list DDR5-6400 CUDIMM stock plus DDR5-7200 to 8400 XMP tune target. Both families list NitroPath plus 400MT/s and 57 percent retention improvement. That delta applies to slot headroom versus prior ROG slot, not to CPU memory controller limit.

NitroPath function deserves plain detail. DDR5 at 8000 plus MT/s fails most often at slot contact and trace stub, not at die. NitroPath shortens gold finger path, moves signal via to reduce reflection, and tightens pin pressure for lower contact resistance. Result is cleaner eye diagram at high frequency and fewer training fails after power loss. ASUS quantifies as plus 400MT/s max headroom and 57 percent better retention, meaning successful re boot at same tune after AC loss. Test both claims with 10 cold boots and 30 minute Karhu or TestMem5 anta777 pass. If 8000 boots 10 of 10 with NitroPath board but 9 of 10 on older slot, the claim maps to daily stability. If only max bench rises but daily 6400 errors persist, the CPU sample or kit bins are the limit, not the slot.

AMD fabric behavior caps daily benefit. Ryzen 9000 UCLK equals MEMCLK at 3000 to 3200 MHz for DDR5-6000 to 6400 gives lowest latency near 60 to 65 ns tuned. Above that UCLK drops to half rate, latency rises to 75 to 90 ns, bandwidth rises but gaming lows often flatten or drop. That is why 9600MT/s on X870E is a validation number, not a gaming recommendation. Best AMD gaming remains DDR5-6000 CL28 to CL30 tuned with tight subtimings, or DDR5-6400 CL30 on strong IO die. Apex style 9000 daily makes no sense on AM5 because fabric cannot use it in 1 to 1. Buy X870E memory for low latency at 6000, not for max MT/s.

Intel controller behavior favors raw MT/s more. Core Ultra memory controller with CUDIMM Clock Driver redrives clock at DIMM, which allows 8000 plus with Gear 2 without the same fabric penalty as AMD. Latency near 65 to 75 ns tuned at 8000 is common on Apex with good kit. Bandwidth scales almost linearly to 9000. Games that stream assets plus background compile benefit from that bandwidth. Stream plus game on one Intel box shows fewer lows drops when memory runs 8000 tuned versus 6400 stock. Apex two DIMM layout is the reason ASUS can claim 9GT/s plus only there. Four DIMM Extreme cannot match it due to extra slot load. If memory bench or 8000 plus daily is the goal, Apex is the only correct pick across both families.

Buy guidance by kit. AMD X870E daily: 2x16GB DDR5-6000 CL30 EXPO at 1.35V, or 2x24GB DDR5-6400 CL32 where QVL lists it. Avoid 4x16GB for 6000 plus because dual rank per channel plus four stick load forces 5200 to 5600 in most cases. Intel Z890 daily: 2x16GB or 2x24GB DDR5-7200 to 8000 XMP or CUDIMM at 1.4 to 1.45V with DIMM fan over 8000. Avoid mixing old UDIMM with new CUDIMM. They train differently and often fail joint XMP. Update BIOS before memory swap on both sockets. Save working profile to USB via BIOS profile tool before pushing higher. One failed train can reset timings and cost an hour if no backup exists.

6. Gap explained: Thunderbolt 5 80 to 120Gbps vs USB4 40Gbps

This is the single largest IO gap between families. ROG X870E flagship lists USB4 40Gbps Type C x2. Each port moves 40Gbps total, shared between data plus DisplayPort Alt Mode. Practical data rate after overhead is about 32Gbps, or 4,000 MB per s, enough for one PCIe 4.0 x4 SSD at full speed, or one 4K 144Hz display plus fast SSD with shared headroom. Daisy chain supports hub plus SSD plus display, but total stays 40. Power delivery per port is 27W to 60W depending on SKU and PSU cable config. DP Alt Mode input comes from iGPU or dGPU DP in header where wired.

ROG Z890 Extreme lists Thunderbolt 5 80Gbps default with 120Gbps Bandwidth Boost. Each port negotiates 80Gbps symmetric for data, or 120Gbps transmit plus 40Gbps receive in display heavy mode for high refresh 8K chains. Practical data rate after overhead is about 64Gbps symmetric, or 8,000 MB per s, double USB4. In Boost display mode video gets 120Gbps pipe while data keeps 40Gbps, so dual 8K 60Hz plus SSD can run where USB4 must drop refresh or disconnect drive. Daisy chain supports up to 5 devices per port on certified docks. Power delivery per port is higher on Extreme where 140W PD in header allows 60W to 90W out depending on PSU.

Math in buyer terms: 120 divided by 40 equals 3 times headline. 80 divided by 40 equals 2 times sustained data. Copy 100GB project folder at full link: USB4 at 4,000 MB per s moves it in about 25 seconds. Thunderbolt 5 at 8,000 MB per s moves it in about 12 to 13 seconds. Capture 4K 120 ProRes at 1,500 Mbps plus 8K timeline read at 3,000 MB per s simultaneously: USB4 saturates and drops preview frames. Thunderbolt 5 holds both with headroom. Drive two 4K 240Hz OLED monitors from one cable plus 10G NAS plus SSD dock: USB4 forces DSC heavy compression or second cable. Thunderbolt 5 Boost runs it from one port with lighter compression. For single SSD plus single 4K 144Hz use, gap is zero in feel. For docked studio with eGPU plus dual 8K plus NVMe shelf, gap decides purchase.

Compatibility and cost nuance: Thunderbolt 5 needs certified cable rated 80Gbps for full speed. Passive 0.5m cable holds 80. Active 1m plus cable holds 80 with chip assist. Cheap USB4 40Gbps cable on Thunderbolt 5 port falls back to 40. USB4 SSD on Thunderbolt 5 port runs at 40 max because device link caps it. Thunderbolt 5 SSD or dock is needed to see 80 plus. Those devices cost 100 to 250 dollars more than USB4 equivalents in September 2026 street. Factor dock cost into board choice. Z890 Extreme premium plus Thunderbolt 5 dock premium totals 300 to 500 dollars over X870E plus USB4 dock. Pay it only if weekly workflow moves 500GB plus over wire or drives dual high refresh 4K plus from one cable.

Display chain detail: X870E USB4 supports one 8K 60Hz or dual 4K 60Hz per port with DSC where GPU allows. Z890 Thunderbolt 5 supports dual 8K 60Hz or triple 4K 144Hz per port with DSC in Boost mode. Both need GPU DP in cable from dGPU to board for dGPU image over Type C. Without DP in, Type C display uses iGPU only, which limits refresh on Intel UHD and AMD 8000 series iGPU. Check rear panel diagram for DP in ports before planning triple monitor Type C. Sleep resume with Thunderbolt 5 dock needs BIOS plus Intel Thunderbolt driver dated August 2026 or later, else second wake fails to link at 80 and falls to 40 until replug.

7. Network: WiFi 7 both plus 10G LAN both

Wireless is tie. Both microsites list WiFi 7 2x2 with 320MHz channel, 4096 QAM, Multi Link Operation, and Q-Antenna directional antenna. Link rate ceiling is 5.8Gbps on 6GHz 320MHz 2x2 under clean spectrum. Practical home throughput at 3m line of sight with WiFi 7 router is 2,500 to 3,800 Mbps TCP, or 310 to 475 MB per s. At 10m through one wall it falls to 1,200 to 2,000 Mbps. MLO bonds 5GHz plus 6GHz to cut latency spikes during game plus stream. Measured ping to router is 2 to 4 ms clean, 6 to 12 ms congested. Antenna placement matters more than board brand. Use included standup antenna at desk height, away from steel case side, with line to router. Q-Antenna software shows direction arrow and signal score to aim it.

Wired is tie at flagship. Both Glacial and Extreme list Marvell AQtion 10G plus Intel 2.5G dual ports. Lower Hero trims to 5G plus 2.5G on some revisions, so check exact SKU table before assuming 10G. 10G port moves 10Gbps full duplex, or 1,250 MB per s, enough for NAS NVMe pool or 10G switch uplink. Practical copy from NAS with 4x SATA SSD pool is 900 to 1,050 MB per s. With NVMe NAS pool it holds 1,150 plus. Cable need is Cat6a for 10G past 30m, Cat6 for short runs under 30m in clean homes. Switch cost remains the gate. 10G switch 4 port plus 10G NAS card totals 350 to 600 dollars in September 2026. Without 10G switch and NAS, the 10G port idles at 1G or 2.5G and adds zero feel over 2.5G board.

Driver and OS notes: WiFi 7 needs Windows 11 24H2 plus Intel BE200 or Qualcomm NCM865 module driver dated mid 2026 or later plus WiFi 7 router firmware with MLO enabled. Some routers ship MLO off by default. Turn it on per SSID. 10G Marvell needs AQtion driver 3.1.9 or later for sleep resume without link drop. Set Energy Efficient Ethernet off for lowest latency gaming on wired. SetInterrupt Moderation to low for 10G NAS copies. For streamers, bind OBS to wired 10G or 2.5G and leave WiFi for background devices. That split avoids buffer bloat when WiFi retries spike.

Audio plus Bluetooth tie as well. Both list Bluetooth 5.4 with LE Audio, ALC4082 codec plus ESS ES9219 DAC for front headphone, Savitech amp path, and DTS or Dolby packages via Armoury Crate. Front panel audio at 32 ohm holds clean with low noise floor where case cable routes away from GPU power. For competitive voice, wired USB mic plus wired LAN beats any WiFi plus Bluetooth combo by 8 to 15 ms and fewer dropouts. Network verdict is simple. Need 10G NAS today or WiFi 7 router in same room, either flagship works. Need neither, save money on lower Hero with 5G plus WiFi 7 and put savings to GPU or SSD.

8. Power: 24 plus 2 plus 2 vs 24 plus 1 plus 2 plus 2

Stage counts look almost identical but map differently. X870E flagship block reads 24 plus 2 plus 2. That is 24 VCore for CCD plus IO die core rails, 2 SOC for memory controller plus fabric plus iGPU slice, 2 misc for standby and control. Total 28 phases. Z890 Extreme block reads 24 plus 1 plus 2 plus 2. That is 24 VCore for P plus E cores, 1 VCCGT for Intel graphics and media, 2 VCCSA plus high power aux, 2 VNNAUX plus control. Total 29 phases. Both use 110A Smart Power Stage where listed, 10K black metallic capacitors, MicroFine alloy chokes, and 8 plus 8 pin ProCool II inputs with solid pins. Control is ASUS Digi plus with EPU polling.

Current math shows headroom past any stock CPU. 24 stages times 110A equals 2,640A theoretical at VCore, thermally limited to about 500 to 650A sustained with heatsink plus airflow. Ryzen 9 9950X3D at 200W PPT draws about 150 to 170A at 1.15 to 1.25V under full load. Core Ultra 9 285K at 250W turbo draws about 190 to 220A at 1.1 to 1.2V. Both boards hold those with 60 percent plus margin. Difference appears in transients and heat path. Intel load steps faster when P cores plus NPU plus media fire together. Extra VCCGT plus VCCSA stages on Z890 isolate graphics and system agent noise from VCore, which holds voltage droop 10 to 20 mV tighter during game plus encode starts. AMD load is smoother but hotter per CCD due to stacked cache insulation. Glacial liquid VRM path removes that heat better than Extreme air fin stack in closed cases with weak top exhaust.

Cooling guidance: Hero and Extreme air flagships need 360mm AIO plus top exhaust plus 25C ambient to hold unlimited power without 95C throttle in 30 minute Blender plus Cinebench loops. Glacial needs custom loop with 360mm plus 240mm radiators minimum, D5 pump at 60 to 70 percent, coolant under 40C. Set LLC Level 4 on ASUS scale for daily, Level 5 only for bench with active VRM fan. Set PBO 200W eco on AMD for quiet rooms with under 2 percent gaming loss. Set Intel PL1 175W PL2 250W with 56 sec tau for daily gaming, unlimited only for render runs with full fan. Check VRM thermistor in HWiNFO. Hold under 85C sustained for capacitor life. Above 95C board will throttle CPU even if CPU core reads 80C.

PSU mapping: 1000W ATX 3.1 Gold minimum for RTX 5080 plus flagship CPU plus 7x M.2 plus Thunderbolt dock power. 1200W Platinum for RTX 5090 plus 285K extreme profile or 9950X PBO plus 200W. Use native 12V-2x6 cable, not triple 8 pin adapter, for 5090. Use separate 8 pin CPU cables, not daisy chain, for both boards. Enable ErP S4 plus S5 in BIOS if USB standby power keeps dock awake and drains 8 to 12W idle. Power verdict is tie for stock, slight Intel edge for transient isolation, slight AMD Glacial edge for sustained liquid heat removal. Buy based on cooler owned, not stage count.

9. Verdict by use case: who buys which flagship

AM5 gaming plus upgrade hold: buy ROG X870E Hero or Glacial. Ryzen 9800X3D and 9950X3D lead 1080p gaming means, AM5 path allows Zen 6 drop in with BIOS only, USB4 40Gbps covers single SSD plus single 4K display, DDR5-6000 CL30 daily is cheap and stable, Glacial loop suits owners with custom cooling already. Total platform cost over two CPU generations is lower because board carries forward. Do not buy X870E if weekly work needs Thunderbolt 5 dock at 80 plus or Apex style 8600 plus memory daily.

Studio dock plus capture plus dual monitor from one cable: buy ROG Maximus Z890 Extreme. Thunderbolt 5 80 to 120Gbps moves 100GB in half the time of USB4, holds dual 8K or triple 4K 144 with SSD attached, 10G LAN feeds NAS at 1,000 MB per s plus, Quick Sync on Core Ultra accelerates H.264 plus HEVC timeline scrub and export. Pair with Thunderbolt 5 dock, 10G switch, and CUDIMM 7200 to 8000 for best balance. Do not buy Extreme if no Thunderbolt 5 device is owned, because premium idles.

Memory overclock bench plus high frequency daily: buy ROG Maximus Z890 Apex. Two DIMM NitroPath layout is the only path ASUS rates at 9GT/s plus. It boots 8600 to 9200 where four DIMM boards fail train. It holds 8000 daily with DIMM fan and tuned SA. Pair with CUDIMM kit from QVL, active cooling, and 360mm AIO. Do not buy Apex for 7 drive NAS local need because lane count favors Extreme. Do not buy Apex for AM5 because socket is Intel only.

Quiet 4K 120 living room gaming: tie, buy cheaper Hero of either socket based on CPU owned. At 4K ultra GPU binds, board gap shrinks to 1 to 3 percent. Pick based on CPU cooler and LAN need. X870E Hero with 9950X3D plus RTX 5080 is efficient and cool. Z890 Hero with 265K plus RTX 5080 is smooth with Quick Sync for background recording. Put savings versus Extreme or Glacial into GPU tier or 4TB PCIe 4.0 game drive, which adds more feel than flagship shroud.

Small business NAS plus VM plus archive: buy Extreme for 10G plus Thunderbolt 5 target mode plus 7x M.2, or buy X870E Hero plus 10G add in if AM5 is already owned. Count SATA need first. Both flagships cut SATA to 4 or fewer when M.2 populate fully. If 6x HDD archive is needed, add LSI HBA in PCIe x4 slot and confirm bifurcation still leaves GPU at x8 acceptable. ECC need pushes away from both ROG flagships toward ProArt or workstation boards because ROG lists non ECC UDIMM only in most QVL. Check QVL ECC column before assuming support.

Final order logic: CPU first, cable need second, memory target third, cooler fourth. Ryzen X3D plus custom loop plus USB4 enough equals X870E Glacial. Ryzen X3D plus AIO plus value focus equals X870E Hero. Core Ultra plus Thunderbolt 5 dock plus 10G NAS equals Z890 Extreme. Core Ultra plus 8600 plus memory bench equals Z890 Apex. Either Hero for 4K GPU bound with no dock equals save 300 dollars. No bad flagship, only bad match to weekly ports used.

10. FAQ: 6 answers

1. Are X870E and Z890 both current in September 2026?
Yes per ASUS microsites September 2026. X870E is current AMD 800 series for AM5 Ryzen 9000 and 8000. Z890 is current Intel 800 series for LGA1851 Core Ultra Series 2. Both list WiFi 7, 10G LAN on top SKUs, 7x M.2 with add in cards, NitroPath plus 400MT/s with 57 percent retention, DDR5 only, and PCIe 5.0 GPU plus M.2. Pick by CPU owned and Thunderbolt need, not by age.

2. What is the real gap between Thunderbolt 5 120Gbps and USB4 40Gbps?
Sustained data is 80Gbps versus 40Gbps, or 2 times. Boost video mode on Thunderbolt 5 reaches 120Gbps for display heavy chains, or 3 times headline. Usable data after overhead is about 8,000 MB per s versus 4,000 MB per s. A 100GB copy takes about 12 seconds versus 25 seconds at full link. Single SSD plus single 4K display shows no feel gap. Docked dual 8K plus SSD plus 10G shows large gap.

3. Do both flagships really support 7x M.2?
Yes at flagship config with add in cards counted. X870E Glacial and Hero reach 7x via 5 onboard plus 2 via ROG Hyper M.2 card or DIMM.2 module. Z890 Extreme reaches 7x via 5 to 6 onboard plus 1 to 2 via ROG Hyper M.2 card or PowerBoost module. Populating the add in card can cut GPU to x8 and disable some SATA or USB share paths. Read the lane share diagram for the exact SKU before adding drives.

4. Which memory claim is higher: DDR5 9600MT/s or 9GT/s plus?
9GT/s plus on Z890 Apex is higher. 9GT/s equals 9000 MT/s, and plus means validated above 9000 with CUDIMM on two DIMM NitroPath layout. X870E 9600MT/s plus OC is also high but applies to AMD OC validation, not daily fabric speed. Daily gaming best remains DDR5-6000 CL30 on AMD 1 to 1 and DDR5-7200 to 8000 on Intel. Both families share NitroPath plus 400MT/s and 57 percent retention claim for slot headroom.

5. Does 24 plus 2 plus 2 versus 24 plus 1 plus 2 plus 2 change CPU choice?
No for stock power. Both deliver 500A plus sustained with airflow, past 200W AMD PPT and 250W Intel turbo. Z890 extra VCCGT plus VCCSA stages help Intel transients during game plus encode by 10 to 20 mV tighter droop. X870E Glacial liquid path helps sustained AMD heat removal under custom loop. Buy based on cooler owned and socket, not stage count alone. Hold VRM under 85C sustained for life.

6. Which flagship should most buyers pick for gaming only?
Buy by CPU. Ryzen 9800X3D or 9950X3D owners buy X870E Hero for value or Glacial for loop. Core Ultra 265K or 285K owners buy Z890 Hero for value or Extreme for dock. At 4K 120 GPU bound the board gap is 1 to 3 percent. Put the 300 dollar flagship premium into GPU tier or 4TB game SSD unless Thunderbolt 5, 10G NAS, 7x M.2, or Apex 9000 memory is used weekly.

Sources: ASUS ROG Crosshair X870E Glacial and Hero microsite pages September 2026 for USB4 40Gbps, 7x M.2 via Hyper plus DIMM.2, DDR5 9600MT/s OC, NitroPath plus 400MT/s and 57 percent, WiFi 7, 10G LAN, 24 plus 2 plus 2 power. ASUS ROG Maximus Z890 Extreme and Apex microsite pages September 2026 for Thunderbolt 5 80 to 120Gbps, 7x M.2 via Hyper plus PowerBoost, DDR5 9GT/s plus Apex, NitroPath plus 400MT/s and 57 percent, WiFi 7, 10G LAN, 24 plus 1 plus 2 plus 2 power. AMD AM5 and Intel LGA1851 spec pages for socket and PCIe 5.0 baseline.

Labels: Hardware, AMD, Intel