So, I’m got supper confused.
I’m trying to make NVLink work with two FE 3090 on Windows 10 machine.
I have the 4 slots bridge, like: GeForce - RTX NVLINK BRIDGE for 3090 Cards - https://www.bestbuy.com/site/nvidia-geforce-rtx-nvlink-bridge-for-3090-cards-space-gray/6441554.p?skuId=6441554
The graphics driver is the latest: 461.92
Motherboard: z490 gaming plus ms-7c75 (No SLI support!!!)
I was using Visual studio 2019 to build peer-to-peer test from CUDA samples and in result got:
Peer access from GeForce RTX 3090 (GPU0) → GeForce RTX 3090 (GPU1) : No
Peer access from GeForce RTX 3090 (GPU1) → GeForce RTX 3090 (GPU0) : No
Two or more GPUs with Peer-to-Peer access capability are required for simpleP2P.exe.
Peer to Peer access is not available amongst GPUs in the system, waiving test.
Results from running
nvidia-smi nvlink -c:
GPU 0: GeForce RTX 3090 (UUID: …)
GPU 1: GeForce RTX 3090 (UUID: …)
During research I saw in one place that motherboard requires to have SLI support and in another place there is information that SLI is outdated and NVLink is completely different format and using motherboard without SLI support is okay … So, I really don’t know anymore.
Should I try to replace motherboard or the problem in the different place?