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vade t1_j0dl85z 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.

Anything more would be tough without a custom loop, and dual PSU.

Works great!

edit: I use a Fractal Design Design XL, and mount one 3090 FE vertically with a riser. Its janky but works.

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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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vade t1_j0gp6ha wrote

We have a Ryzen 3950 max ram (128gb) - but I’d like to get a system that supports more ram and 16x on all pci slots. But alas - $$$

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Outrageous_Room_3167 OP t1_j0gpkqs wrote

Isn't that amount of RAM good enough for the setup? Or you think it's a bottle neck in the training, just new to all of this :)

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vade t1_j0gpows wrote

It’s fine - we haven’t had a huge issue due to it but we work on video related projects so memory is always a boon. That’s all!

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