// AI news · 2026-11-01 · Tom's Hardware
Open-source USB tool unlocks NVIDIA GPU AI limiter
An open-source UEFI tool runs from a USB drive before Windows loads to bypass NVIDIA's tensor performance limiter on RTX 20, 30, and 40 series GPUs.
Published 2026-11-01 22:00 (Beijing time)Source Tom's HardwareAuto-summarised, fact-checked against source
01Summary
It modifies speed registers via community V67 firmware patch with read-back verification, enabling full tensor unit performance without BIOS flashing or driver updates. The tool operates once per boot and does not persist across power cycles. Secure Boot cannot be bypassed, and Linux runtime power management may disable the unlock.
Summarised from the original article by an open-source model, then checked automatically: every number and English name must appear in the source. The original article is authoritative.
02Key points
- Runs from USB before OS loads; no BIOS or driver changes needed.
- Uses V67 firmware patch with read-back verification for safety and stability.
- Effective on RTX 20/30/40 series, with known issues on some models.
- Fails under Secure Boot or Linux idle power management.
03Source
Open-source USB tool unlocks Nvidia's half-speed GPU AI limiter on Windows
Tom's Hardware · published 2026-11-01 22:00 Beijing time
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