Tengo una instalación nueva de ubuntu 12.04.4 LTS y CUDA 5.5 con el controlador nvidia-331.20. Hay 4 GeForce GTX 780 a bordo. X se ejecuta en una tarjeta integrada, mientras que las tarjetas Nvidia se superponen para realizar algunos cálculos.
He notado que el giro del ventilador de la tercera tarjeta es 0 cuando no se realizan cálculos a pesar de la temperatura:
Cuando algunos cálculos:
+------------------------------------------------------+
| NVIDIA-SMI 331.20 Driver Version: 331.20 |
|-------------------------------+----------------------+----------------------+
| 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 780 Off | 0000:02:00.0 N/A | N/A |
| 46% 80C N/A N/A / N/A | 93MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 780 Off | 0000:03:00.0 N/A | N/A |
| 47% 80C N/A N/A / N/A | 93MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce GTX 780 Off | 0000:83:00.0 N/A | N/A |
| 43% 79C N/A N/A / N/A | 93MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce GTX 780 Off | 0000:84:00.0 N/A | N/A |
| 48% 80C N/A N/A / N/A | 93MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
Inmediatamente después de finalizar los cálculos:
+------------------------------------------------------+
| NVIDIA-SMI 331.20 Driver Version: 331.20 |
|-------------------------------+----------------------+----------------------+
| 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 780 Off | 0000:02:00.0 N/A | N/A |
| 38% 73C N/A N/A / N/A | 10MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 780 Off | 0000:03:00.0 N/A | N/A |
| 38% 73C N/A N/A / N/A | 10MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce GTX 780 Off | 0000:83:00.0 N/A | N/A |
| 38% 73C N/A N/A / N/A | 10MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce GTX 780 Off | 0000:84:00.0 N/A | N/A |
| 0% 75C N/A N/A / N/A | 10MiB / 3071MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
¿Qué podría causar que uno de los fanáticos de las cartas actúe de esta manera?