ASUS’ 800W XOC BIOS for ROG Matrix RTX 5090 also unleashes cards from Gigabyte, MSI & Co – but not without risk

What was previously only possible with shunt mods and soldering work is now done by ASUS on the software side: The 800-watt XOC BIOS of the ROG Matrix RTX 5090, which costs around 4,000 US dollars, was successfully flashed on cards from Gigabyte, PNY, Palit and MSI. Result: Massive boost clocks, thermal escalation and potential collateral damage to the 16-pin connector included.

What makes the XOC BIOS special?

Originally developed for the ROG flagship with quad fan and custom PCB, the BIOS raises the power limit to 800 watts, a whole 300 watts more than standard cards. It also allows clock increases of up to 323 MHz over stock. Users in the Overclock.net forum reportGPU clock rates beyond 3,100 MHz.

Compatibility: Who can – and who can’t

The BIOS file can only be used on models with an identical fan structure. Cards such as Gigabyte AORUS Waterforce WB, Gigabyte Master, Palit RTX 5090, MSI Ventus and PNY ARGB work perfectly, they have three fan headers, just like the Matrix itself.

Models such as ASUS TUF, MSI Suprim Liquid or ASUS Astral Air/LC, on the other hand, fail due to the lack of a third fan connector. The matrix expects three channels, if there are only two, the control breaks off or a fan remains silent. Not a conspiracy, but simply physics.

One user reports: “The BIOS only runs on the Astral White 5090 because it also has three headers internally, ASUS has obviously adapted this for noise control.” Models with fewer fan headers or a different board structure are incompatible.

Performance & risks

First benchmarks show:

• Cyberpunk 2077 with Max Settings, DLSS Ultra Perf FSR FG
• 800W BIOS: 200 MHz core, 3000 MHz VRAM
• 3DMark Steel Nomad score: 16,768 points

But: This power draws significantly more current from the card through the 16-pin connector, exactly the one that was already notorious for melted cables in the RTX 4090. If you use the BIOS, you risk heat problems, voltage instability and, in the worst case, total damage.

Flashing instructions (not recommended)

Start Windows

• Rename the BIOS file to m.rom
• Open command prompt
• Command: nvflashb m.rom -6
• Reboot, driver recognizes card automatically

Important: Anyone using a card with a different power supply, VRM design or fan control should urgently refrain from flashing. The warranty expires immediately.

Conclusion

ASUS’ XOC BIOS is a double-edged sword: on the one hand a gift to extreme overclockers, on the other a potential hardware killer. If you know exactly what you are doing and have the right card, you can unlock a lot of performance. Everyone else should keep their hands off it or wait for specially validated BIOS mods of their AIBs.

Source: Wccftech