Regardless, the performance boost is visible: these BIOS-modded 5090s are running at 100-200 MHz higher boost clocks than Nvidia's stock numbers and Asus' own claim of up to +323 MHz on the actual ROG Matrix card. This is extreme overclocking territory, so gains are marginal, but it's all about topping the charts, and any bit helps, including custom BIOSes.
This leads to higher sustained clock speeds across the board in games and productivity applications, bolstered by increased power consumption, as shown in the screenshots below. Cyberpunk 2077 gets a few more FPS at 4K resolution as well, and users have been reporting slightly better numbers at the same core clock and memory offsets across a number of games.
Look at the top right corner (Image credit: LtMatt on Overclock.net ) (Image credit: Future) (Image credit: Future) (Image credit: Future) As far as the 800W BIOS is concerned, Asus achieved this feat by combining two interfaces: the 16-pin power connector rated for 600W, working alongside a GC-HPWR adapter designed for back-connect motherboards. Forcing this firmware on cards without the custom PCB and cooling of the ROG Matrix cards is, therefore, quite risky, and you might just be accelerating a headline appearance.
The BIOS is available on TPU, but exercise extreme caution; it will most certainly void your warranty. Previously, shunt mods that trick the GPU's resistors into accepting much more power than they think they can handle were used to unlock this sort of headroom. Now, a simple BIOS flash is promising to unlock up to 200W of extra leeway to experiment with and, with the proper cooling, break world records.
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Reference reading
- https://www.tomshardware.com/pc-components/gpus/SPONSORED_LINK_URL
- https://www.tomshardware.com/pc-components/gpus/asus-tempts-fate-unleashes-800w-xoc-vbios-for-its-usd4-000-rog-matrix-rtx-5090-overclockers-and-high-end-gpu-junkies-now-have-their-hands-on-the-hottest-most-power-hungry-5090-around#main
- https://www.tomshardware.com
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