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GPU at 4x

LennyIsLife
By LennyIsLife
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Go to solution Solved by Glenwing,

For PCIe 3.0 x4, no loss. For 2.0 x4, Yes there is a slight loss. Keep in mind this only applies to gaming. In compute applications PCIe 3.0 x16 was a bottleneck as soon as it was available. Also keep in mind you are not allowed to run SLI on anything less than x8 (of any revision) which is usually the reason you'd be running such a low configuration anyway. (CrossFire doesn't have any such restriction so you're fine there).

 

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I've done some research, but there isn't much on this subject. Does anyone know what the performance loss would be of running a GPU at PCIe 4x?

PCIE 2 or PCIE 3

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I've done some research, but there isn't much on this subject. Does anyone know what the performance loss would be of running a GPU at PCIe 4x?

If it's pci gen 2 then I don't think it will even run. If it's 4x pci gen 3 it may only run on amd cards because nvidia requires gen 3 8x last I checked. But no if it works there shouldn't be a bottleneck at all.

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It's fine people say there's no performance loss going from 16X to 4X, it's like 1-2fps, so really no difference. Just remember that only AMD GPUs can run at 4X. Nvidia requires 8X minimum.

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  • Solution

For PCIe 3.0 x4, no loss. For 2.0 x4, Yes there is a slight loss. Keep in mind this only applies to gaming. In compute applications PCIe 3.0 x16 was a bottleneck as soon as it was available. Also keep in mind you are not allowed to run SLI on anything less than x8 (of any revision) which is usually the reason you'd be running such a low configuration anyway. (CrossFire doesn't have any such restriction so you're fine there).

 

5069dd8c52.png

 

cba0dcf237.png

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If it's pci gen 2 then I don't think it will even run. If it's 4x pci gen 3 it may only run on amd cards because nvidia requires gen 3 8x last I checked. But no if it works there shouldn't be a bottleneck at all.

 

You can run graphics cards in any configuration you want, you can run on x1 if you really wanted to. NVIDIA only requires x8 or above for SLI and AMD doesn't require anything like that at all.

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If it's pci gen 2 then I don't think it will even run. If it's 4x pci gen 3 it may only run on amd cards because nvidia requires gen 3 8x last I checked. But no if it works there shouldn't be a bottleneck at all.

Nvidia requires 8x (any gen though as long as physically wired for 8x or higher) for SLI, but for a single card it's go nuts.

"Rawr XD"

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For PCIe 3.0 x4, no loss. For 2.0 x4, Yes there is a slight loss. Keep in mind this only applies to gaming. In compute applications PCIe 3.0 x16 was a bottleneck as soon as it was available. Also keep in mind you are not allowed to run SLI on anything less than x8 (of any revision) which is usually the reason you'd be running such a low configuration anyway. (CrossFire doesn't have any such restriction so you're fine there).

 

5069dd8c52.png

 

cba0dcf237.png

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If it's pci gen 2 then I don't think it will even run. If it's 4x pci gen 3 it may only run on amd cards because nvidia requires gen 3 8x last I checked. But no if it works there shouldn't be a bottleneck at all.

My 750 Ti runs in 4x Gen 2, 8x is only a requirement for SLI. And no performance loss.

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