我注意到我的 4 块 Nvidia GTX 显卡即使没有进程使用它们，功耗也高达约 180W。你们有人能告诉我有什么方法可以降低功耗吗？
系统：Linux Ubuntu 18.04
$ nvidia-smi
Mon Oct 8 17:20:23 2018
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 390.48 Driver Version: 390.48 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 108... On | 00000000:0A:00.0 Off | N/A |
| 0% 39C P8 28W / 160W | 1MiB / 11178MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 107... On | 00000000:0B:00.0 Off | N/A |
| 0% 53C P0 33W / 105W | 1MiB / 8119MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce GTX 108... On | 00000000:0C:00.0 Off | N/A |
| 31% 56C P0 62W / 125W | 1MiB / 11178MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce GTX 108... On | 00000000:0D:00.0 Off | N/A |
| 29% 55C P0 61W / 125W | 1MiB / 11178MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
答案1
我成功解决了这个问题。原来我的卡运行在 P0（性能模式）。以下命令将性能模式更改为 P8：
$ nvidia-settings --ctrl-display :0 -a "[gpu:0]/GPUPowerMizerMode=2"