Outrageous_Room_3167

Outrageous_Room_3167 OP t1_j0goxzp wrote

>I run 3x 3090 in a single case, without water cooling, but using one PCI riser and keeping the case open to allow for airflow. This is on a single 1600w PSU, no NVLink.

Oh sweet. So maybe we go the route of 2, 3x3090 machines. Might be the better direction. Was considering 2000W PSU & 4x3090. How much memory & what CPU are you using?

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Outrageous_Room_3167 OP t1_j0ddpsu wrote

>NVLink probably won't matter much since your CPU will be bottlenecked trying to send 5.2 TB/s of data to your GPUs. But again, there are no benchmarks to show how much, maybe the gains from NVLink will be noticeable.

I guess the bigger benefit of the NVLink is the larger memory, but aside from that, I don't think the performance gains are huge from what I've read. My thinking was to build out a chassis with external fans as well to cool everything down.

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