PCI 2.0 x16: can it run a GTX 970 with no significant degradation?

SirGetch · Dec 18, 2014

I have a ASUS M5A97 R2.0 currently for my motherboard. I believe it has 2x PCI-e 2.0 x16 slots. I was wondering, is the 970 just PCI-e 3.0 x8? Or is it PCI-e 3.0 x16? If x16, what will see in terms of FPS drop? Thanks a lot!

Xyos · Dec 18, 2014

Perfectly fine. There have been tests of 3.0 vs. 2.0 and the difference is like 0.001% or something very very small. It will be perfectly fine.

quilciri · Dec 18, 2014

It will run just fine. Any Pci-e card will work in any PCI-e version. The bandwidth of 16 2.0 lanes will be fine for it as well.

SirGetch · Dec 18, 2014

Xyos :

Thank you for the prompt reply!... and the info.

quilciri · Dec 18, 2014

Xyos :

Not sure what you mean by "the difference" here, since 3.0 lanes are double the bandwidth of 2.0 lanes.

SirGetch · Dec 18, 2014

quilciri :

Elaborate?

Xyos · Dec 18, 2014

quilciri :

"Double the bandwidth" means nothing when the PCIe2.0 slot was never fully saturated. A single card plugged into a 2.0 slot still leaves much more room for data. You can get close to saturating a 2.0 lane only with double GPU cards like the 690.

Because 2.0 is not fully saturated there is no difference from 2.0 to 3.0. Maybe like 10 years down the line when we are moving tons more data it will become obsolete, but as it stands when it was created it was meant to last.

quilciri · Dec 18, 2014

Xyos :

A single GPU at the GTX 780 level or higher (i.e., the 970) loses about 3% performance in a pci-e 2.0 x16 slot; the 970 will see about the same result. Not really noticeable, but it indicates that pci-e 2.0 is completely saturated by single GPU's now.

SirGetch · Dec 18, 2014

Xyos :

quilciri :

"Double the bandwidth" means nothing when the PCIe2.0 slot was never fully saturated. A single card plugged into a 2.0 slot still leaves much more room for data. You can get close to saturating a 2.0 lane only with double GPU cards like the 690.

Because 2.0 is not fully saturated there is no difference from 2.0 to 3.0. Maybe like 10 years down the line when we are moving tons more data it will become obsolete, but as it stands when it was created it was meant to last.

Thanks, actually learned a lot from that.

SirGetch · Dec 18, 2014

quilciri :

Xyos :

A single GPU at the GTX 780 level or higher (i.e., the 970) loses about 3% performance in a pci-e 2.0 x16 slot; the 970 will see about the same result. Not really noticeable, but it indicates that pci-e 2.0 is completely saturated by single GPU's now.

Thanks for clearing that up.

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PCI 2.0 x16: can it run a GTX 970 with no significant degradation?

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