Hello everyone,
I’m running two RTX A6000 cards in the same machine and noticing an odd discrepancy in their available memory. One card consistently reports around 49GB total VRAM (PNY branded), while the other reports around 46GB total VRAM (NVIDIA-branded).
System Details & Observations:
- Driver Version: 550.120
- CUDA Version: 12.4
- Operating System: Linux (Ubuntu)
GPU 0 (PNY):
- Total Memory: ~49GB (49140MiB)
- VBIOS Version: 94.02.5C.00.02 (shown in nvidia-settings)
GPU 1 (NVIDIA):
- Total Memory: ~46GB (46068MiB)
- VBIOS Version: 94.02.5C.00.0A (shown in nvidia-settings)
Attached is an excerpt from nvidia-smi output:
I also noticed that the nvidia-settings tool shows slightly different VBIOS versions for each card: one ends with “.02” and the other with “.0A”. Could the difference in VBIOS explain the variance in total memory capacity? Are there other known factors (e.g., board revision, memory vendor differences, or firmware differences) that might cause one RTX A6000 to show less VRAM than the other?
Thanks in advance for your help!
