CachyOS kernel module may unlock RTX 3090, showing 15% performance boost
A Linux kernel module released for the CachyOS 7.2.8-1 distribution combines the CMP unlocker's V67/PLM technique with the pre‑driver timing of the UEFI approach. The module writes speed selectors (SS0 0x88888888 for full BF16 rate and SS1 0x8, whose effect is untested) and performs a fast link reset before the unmodified NVIDIA driver binds the card. In the author’s test, an RTX 3090 at PCI…
Key points
- The module unlocks an RTX 3090 on a CachyOS kernel, reporting ~15% pixel and 5% tensor performance gains.
- Only GA102‑based RTX 3090 cards are supported; other RTX 3090, GA104, or professional GPUs have not been verified.
- Installation uses make install‑arch/deb/rpm packages and requires a cold power‑off; warm reboots are not supported.
The hack works only on GA102‑based RTX 3090 cards; other RTX 3090 boards, GA104 parts, professional RTX A‑series, or data‑center GPUs have not been verified. Installation is done via make install‑arch, make install‑deb, or make install‑rpm packages that place the module and firmware in the initramfs, loading it before the NVIDIA driver. The unlock requires a cold power‑off; warm reboots are unsupported and will likely fail. All firmware is downloaded over HTTPS, verified with SHA‑256, and the module is GPL‑2.0‑only.
Amazing free 3090 speedup hack, verified works 15% PP, 5% TG for free
github.com · 18 October 2026Loading the full article…
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