Idle power usage on RTX3060 LHR is stuck at 10-20 watts after running an app, like FFMPEG using the nvenc asic or using cuda. It does not return back to 4-5 watts and the card heats up to around 50c. But sometimes a card does get into the low power idle state (4-5watts), I am not sure why.
To test run something on the GPU, stop it. Notice 15-25w while idle, then do modprobe -r nvidia_drm; modprobe nvidia_drm to reset the GPUs, notice the power is back to 10ish watts with 1 lucky GPU at 4w.
How to make all the GPUs idle at 4-5w after running workload?
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 510.73.05 Driver Version: 510.73.05 CUDA Version: 11.6 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 NVIDIA GeForce ... Off | 00000000:18:00.0 Off | N/A |
| 0% 50C P8 14W / 170W | 1MiB / 12288MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
| 1 NVIDIA GeForce ... Off | 00000000:51:00.0 Off | N/A |
| 0% 49C P8 10W / 170W | 1MiB / 12288MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
| 2 NVIDIA GeForce ... Off | 00000000:8A:00.0 Off | N/A |
| 0% 40C P8 4W / 170W | 1MiB / 12288MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
| 3 NVIDIA GeForce ... Off | 00000000:C3:00.0 Off | N/A |
| 0% 49C P8 10W / 170W | 1MiB / 12288MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------