How many nVIDIA GPUs does my system actually have?

This is silly, but in my situation I do not actually know the number of nVIDIA Grid K2 GPUs on my server (I can't physically go and verify).

The output of nvidia-smi is:

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 367.64 Driver Version: 367.64 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GRID K2 On | 0000:86:00.0 Off | Off |
| N/A 41C P8 29W / 117W | 10MiB / 4095MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 1 GRID K2 On | 0000:87:00.0 Off | Off |
| N/A 33C P8 28W / 117W | 8MiB / 4095MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 2 GRID K2 On | 0000:8B:00.0 Off | Off |
| N/A 34C P8 28W / 117W | 8MiB / 4095MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+

nvidia-smi -L gives:

GPU 0: GRID K2 (UUID: GPU-f38f91db-d219-6dae-3f2c-ccce0dee93b5)
GPU 1: GRID K2 (UUID: GPU-a165f882-655e-31c0-b6f0-46748129ff17)
GPU 2: GRID K2 (UUID: GPU-44daaa30-3e5b-558c-2775-1e9802be7e91)

The host machine is a 20-core, 2-socket Intel machine.

Now, I can't figure out why it shows 3 GPUs since 1 Grid K2 actually has 2 GPUs so nvidia-smi should actually show even number of Grid K2 GPUs (either 2 or 4 in my case).

2 Answers

Looks like 3 by your stats, but you can make more detailed checks.

If your system is running Windows Server, then use from a cmd:

wmic path win32_VideoController get AdapterRAM, Caption, DriverVersion

If you use Linux:

lspci | grep -i --color 'vga\|3d\|2d

or

lshw -short | grep -i --color display

nvclock command should also show you clock info on GPUs.

These will list good info about the video adapters.

Try nvidia-smi -L

(From the man nvidia-smi output on a Linux system:)

-L, --list-gpus
List each of the NVIDIA GPUs in the system, along with their UUIDs.

Edit:Re-reading the original question, I see that OP has already tried this solution and it is not what they are looking for. Doh.