I was curious whether NVLink would work fully with a mix of two different boards, in this case a 2080 Ti and a 2070 Super. I don’t really expect it to work because they’re different device ID’s and there’s probably something in the code to prevent issues when using two different device ID’s, but before I started debugging why P2P memory is not supported, I thought I’d ask.
GPU 0: GeForce RTX 2080 Ti (UUID: GPU-486bc497-f1ea-4fbe-7eb8-841677bdf39c)
Link 1, P2P is supported: true
Link 1, Access to system memory supported: true
Link 1, P2P atomics supported: true
Link 1, System memory atomics supported: true
Link 1, SLI is supported: true
Link 1, Link is supported: false
GPU 1: GeForce RTX 2070 SUPER (UUID: GPU-17a4d2e7-f798-010e-3258-f09cbc334377)
Link 0, P2P is supported: true
Link 0, Access to system memory supported: true
Link 0, P2P atomics supported: true
Link 0, System memory atomics supported: true
Link 0, SLI is supported: true
Link 0, Link is supported: false
Checking GPU(s) for support of peer to peer memory access…
Peer access from GeForce RTX 2080 Ti (GPU0) → GeForce RTX 2070 SUPER (GPU1) : No
Peer access from GeForce RTX 2070 SUPER (GPU1) → GeForce RTX 2080 Ti (GPU0) : No
Two or more GPUs with Peer-to-Peer access capability are required for ./simpleP2P.
Peer to Peer access is not available amongst GPUs in the system, waiving test.