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0 pointsjacquesm9y ago0 comments

That's one problem, another is the size of the powersupply. And maybe that's the only problem, I don't see why a GPU would become unstable when using fewer lanes, all it should do is get slower.

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samnco9y ago· 2 in thread

I don't know. Maybe the make of the extenders isn't very good, I saw other people with similar issues.

The PSU is the Corsair AX1500i (1500W), with 10x lines for GPUs. It's robust on paper, didn't have any problem with just 4 plugged in.

But I must say... The T630 are very noisy compared to these, but so much more powerful #NotGoingBack

jacquesmOP9y ago

I just bought a GTX1080ti + a similar corsair as an upgrade for my 3 year old Dell, it works like a charm.

If you have a PSU that big then that probably isn't the problem. I thought you might be using the PSU that comes with those extender boxes and they usually are very puny (250 W or so).

Do you use it for gaming or for CUDA?

Do you run the 4 GPUs in the extender?

samnco9y ago

Yes, each GPUs has a 4x -> 16x and a 4x-4x extender, in addition to the m.2 -> PCI-e 4x adapter.

So many potential failure points in there. The sole use case is CUDA. Essentially I wanted a portable cluster with GPUs and that did the work for a couple of month. Now it's getting more serious so the switch to T630 makes sense, and I repurposed the NUCs into the control plane of the K8s cluster.

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