Advice regarding a dual 4080 setup for folding

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Jack_Welsh
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Joined: Wed Feb 08, 2023 5:20 pm

Advice regarding a dual 4080 setup for folding

Post by Jack_Welsh »

I am looking for some advice about running a dual 4080 setup. I am currently running a 7900x with a 4080 and I am wanting to add another 4080 for Folding. The first card will be use for gaming every now and again too. The motherboard I have currently, only the 1st PCIe slot goes to the CPU so I am looking at upgrading, I have found a candidate, the MSI PRO X670-P, it has of course PCIe 4.0x16 slot going to the CPU and then it has another slot going back to the CPU which is PCIe 4.0x4.

My question is would the 4080 be able to use it's full potential at those speeds (PCIe 4.0x4) for Folding or would I have to maybe go up to MSI MPG X670E CARBON which would allow me to run both the cards at PCIe 5.0x8 to the CPU.

Thanks in advance
Mxyzptlk
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Re: Advice regarding a dual 4080 setup for folding

Post by Mxyzptlk »

So... I know that a 3080 / 3080ti will do fine on a 3.0x8 (I am doing that currently on one of my rigs). I think that is the same speed as 4.0x4... so that should work fine for a 3080. You having a 4080 is a bit different though.. Tough call for me to say, hopefully someone can chime in on that.

But... The way my brain goes: Buy once, cry once. Get the 5.0x8 mobo option and be done with it.

How are you going to fit (2) 4080's in one machine? I certainly cannot do that in any of Tower my rigs. I could on my rack rig with full pcie x16 risers....
I fold..... look at my folding setups here: www.mxyzptlk.us
Jack_Welsh
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Joined: Wed Feb 08, 2023 5:20 pm

Re: Advice regarding a dual 4080 setup for folding

Post by Jack_Welsh »

Mxyzptlk wrote: Thu Mar 23, 2023 3:21 am So... I know that a 3080 / 3080ti will do fine on a 3.0x8 (I am doing that currently on one of my rigs). I think that is the same speed as 4.0x4... so that should work fine for a 3080. You having a 4080 is a bit different though.. Tough call for me to say, hopefully someone can chime in on that.

But... The way my brain goes: Buy once, cry once. Get the 5.0x8 mobo option and be done with it.

How are you going to fit (2) 4080's in one machine? I certainly cannot do that in any of Tower my rigs. I could on my rack rig with full pcie x16 risers....
I plan to change to the 7000D case from the 5000D and then use a PCIe riser to allow me to drop it more slots in the case
JimboPalmer
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Re: Advice regarding a dual 4080 setup for folding

Post by JimboPalmer »

Just a thought, if you plan to replace every single part, it would be cheaper and faster to have two PCs, one GPU each.
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Jack_Welsh
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Re: Advice regarding a dual 4080 setup for folding

Post by Jack_Welsh »

JimboPalmer wrote: Thu Mar 23, 2023 5:27 am Just a thought, if you plan to replace every single part, it would be cheaper and faster to have two PCs, one GPU each.
I thought this but really if I'm able to use my current motherboard then all I'm changing is the case and adding a card and also I'd prefer it if it was all in the same case
Kjetil
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Re: Advice regarding a dual 4080 setup for folding

Post by Kjetil »

JimboPalmer wrote: Thu Mar 23, 2023 5:27 am Just a thought, if you plan to replace every single part, it would be cheaper and faster to have two PCs, one GPU each.
I have 4x3090, 2x2080Ti and 4x4090. One gpu per pc.
https://folding.extremeoverclocking.com ... s=&u=94811
FaaR
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Re: Advice regarding a dual 4080 setup for folding

Post by FaaR »

Kjetil wrote: Fri Mar 24, 2023 8:15 pm I have 4x3090, 2x2080Ti and 4x4090. One gpu per pc.
Also, with that kind of a setup, a direct connection to a hydroelectric dam I assume. ;)

(DAYUM btw! lol)
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