lspci  | grep -i vga

这样就可以显示机器上的显卡信息，比如

[root@localhost conf]# lspci | grep -i vga

01:00.0 VGA compatible controller: nVidia Corporation Device 1081 (rev a1)

02:00.0 VGA compatible controller: nVidia Corporation GT215 [GeForce GT 240] (rev a2)

08:05.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 10)

如果想看详细的信息，比如 GeForce GT 240，即 02:00.0

[root@localhost conf]# lspci -v -s 02:00.0

02:00.0 VGA compatible controller: nVidia Corporation GT215 [GeForce GT 240] (rev a2) (prog-if 00 [VGA controller])

Subsystem: ASUSTeK Computer Inc. Device 8351

Flags: bus master, fast devsel, latency 0, IRQ 169

Memory at f9000000 (32-bit, non-prefetchable) [size=16M]

Memory at d0000000 (64-bit, prefetchable) [size=256M]

Memory at ce000000 (64-bit, prefetchable) [size=32M]

I/O ports at bc00 [size=128]

[virtual] Expansion ROM at f8f80000 [disabled] [size=512K]

Capabilities: [60] Power Management version 3

Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+

Capabilities: [78] Express Endpoint, MSI 00

Capabilities: [b4] Vendor Specific Information: Len=14 <?>

Capabilities: [100] Virtual Channel

Capabilities: [128] Power Budgeting <?>

Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>

Kernel driver in use: nvidia

Kernel modules: nvidiafb, nvidia

可以看到GT240的显存是 256M

但是我的系统上其实是装了两块显卡的，还有一块显示不出来，这个时候，对于nvidia显卡的话可以用nvidia-smi命令来查，查看GPU也是用这个命令

[root@localhost conf]# nvidia-smi

Tue Dec  3 14:46:02 2013      

+------------------------------------------------------+                      

| NVIDIA-SMI 4.304.54   Driver Version: 304.54         |                      

|-------------------------------+----------------------+----------------------+

| GPU  Name                     | Bus-Id        Disp.  | Volatile Uncorr. ECC |

| Fan  Temp  Perf  Pwr:Usage/Cap| Memory-Usage         | GPU-Util  Compute M. |

|===============================+======================+======================|

|   0  GeForce GTX 570          | 0000:01:00.0     N/A |                  N/A |

| 50%   65C  N/A     N/A /  N/A |  49%  624MB / 1279MB |     N/A      Default |

+-------------------------------+----------------------+----------------------+

|   1  GeForce GT 240           | 0000:02:00.0     N/A |                  N/A |

| N/A   39C  N/A     N/A /  N/A |   1%    2MB /  255MB |     N/A      Default |

+-------------------------------+----------------------+----------------------+

                                                                              

+-----------------------------------------------------------------------------+

| Compute processes:                                               GPU Memory |

|  GPU       PID  Process name                                     Usage      |

|=============================================================================|

|    0            Not Supported                                               |

|    1            Not Supported                                               |

+-----------------------------------------------------------------------------+

可以看到，还有一块显卡是 GTX 570， 显存是 1279M，也就是我们用lspci看到的 01:00.0