What kind of mobo would you put the 8x 3080s into without killing the bandwidth and creating tons of headache for yourself in getting it to work? There was a similar post here recently. Just stick to the 4090s.
this post was submitted on 19 Nov 2023
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LocalLLaMA
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emmmm, I'm not sure, all I can do is just plug them into the motherboard.
Do you have a link to the post please? I'd like to check it out.
Does your motherboard even have 8 PCIe slots? You’ll be needing server boards. Even workstation boards typically support only 7 (and can’t fit them all due to size)
Using a PCIe splitter cable, split the PCIe 4.0x16 x1 into PCIe 4.0x8 x2. And all gpu use a PCIe extension cable.
I would recommend against this, not to say you are incapable o lr wouldn't figure it out, but it's a head ache. Just the power consumption on something like this alone would drive you to a sizable power bill, not to mention lack of any kind of Nvlink, your 4090 setup is a much better option in my opinion.
You already have rtx 4090 x 2? Then why upgrade, i don't get it. Tell me more about that magic modding, I can't find anything related online.