gpu: lock the memory clock at 810 MHz on the mining hosts (+13% on the 4090) #10

Merged

grenade merged 1 commits from gpu/memory-clock-lock into main

2026-09-03 15:47:00 +00:00

Author	SHA1	Message	Date
Rob Thijssen	1fbe9c5a6b	gpu: lock the memory clock at 810 MHz on the mining hosts (+13% on the 4090) The miner never touches VRAM, so memory at full clock is watts taken from the SMs inside the same power cap. Measured with the CUDA engine, miner paused: 4090 at 250 W 410 -> 463 MH/s (SM 1950 -> 2190 MHz); 3060 at 130 W 81 -> 83. 405 MHz drops the card into a low-power state (155 MH/s) and is refused. Applied by nvidia-power-limit.service from the same config file (NVIDIA_MEMORY_CLOCK_MHZ), configured per host in GPU_MEMORY_CLOCKS; hosts without an entry are reset to the driver default. beast is not listed: inference is memory-bound. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CBgs2nSi4H2mdh8kD8vMX5	2026-09-03 18:45:22 +03:00

Author

SHA1

Message

Date

Rob Thijssen

1fbe9c5a6b

gpu: lock the memory clock at 810 MHz on the mining hosts (+13% on the 4090)

The miner never touches VRAM, so memory at full clock is watts taken from the
SMs inside the same power cap. Measured with the CUDA engine, miner paused:
4090 at 250 W 410 -> 463 MH/s (SM 1950 -> 2190 MHz); 3060 at 130 W 81 -> 83.
405 MHz drops the card into a low-power state (155 MH/s) and is refused.

Applied by nvidia-power-limit.service from the same config file
(NVIDIA_MEMORY_CLOCK_MHZ), configured per host in GPU_MEMORY_CLOCKS; hosts
without an entry are reset to the driver default. beast is not listed:
inference is memory-bound.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CBgs2nSi4H2mdh8kD8vMX5

2026-09-03 18:45:22 +03:00

gpu: lock the memory clock at 810 MHz on the mining hosts (+13% on the 4090) #10

1 Commits