lspci结果：
$ lspci -nn|grep -iP "NVIDIA|Radeon"
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850] [1002:6819]
01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series] [1002:aab0]
05:00.0 VGA compatible controller [0300]: NVIDIA Corporation G92 [GeForce 8800 GT] [10de:0611] (rev a2)
目前我的桌面上有 2 个 GPU。我的显示器连接到 AMD 显示器，我只使用 NVIDIA 显示器进行一些 cuda 编程，所以我不需要它。我不希望 NVIDIA 卡继续工作的原因是它太旧而且噪音很大：
$ nvidia-smi
Sun Aug 16 23:19:35 2015
+------------------------------------------------------+
| NVIDIA-SMI 340.76 Driver Version: 340.76 |
|-------------------------------+----------------------+----------------------+
| 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 8800 GT Off | 0000:05:00.0 N/A | N/A |
| 78% 83C P0 N/A / N/A | 3MiB / 511MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+
我正在使用这两张卡的专有驱动程序：https://aur.archlinux.org/packages/catalyst-total/ https://www.archlinux.org/packages/extra/x86_64/nvidia-340xx/