Для карт Nvidia.
1st GPU
> cat /proc/driver/nvidia/gpus/0/information
Model: GeForce GTX 680
IRQ: 24
GPU UUID: GPU-71541068-cded-8a1b-1d7e-a093a09e9842
Video BIOS: 80.04.09.00.01
Bus Type: PCIe
DMA Size: 40 bits
DMA Mask: 0xffffffffff
Bus Location: 0000:01.00.0
2nd GPU
> cat /proc/driver/nvidia/gpus/1/information
Model: GeForce GTX 580
IRQ: 33
GPU UUID: GPU-64b1235c-51fc-d6f1-0f0e-fa70320f7a47
Video BIOS: 70.10.20.00.01
Bus Type: PCIe
DMA Size: 40 bits
DMA Mask: 0xffffffffff
Bus Location: 0000:08.00.0