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WIll PCI Express 3.0 x8/x4 bottleneck a high end GPU?

Tags:
  • GPUs
  • PCI Express
  • Bottleneck
  • Motherboards
Last response: in Motherboards
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February 16, 2014 8:53:31 AM

I have the GA-x79-UD4 mobo w/ Pci-express(x16/x16/x8). I have 2 gtx780 set up in a dual (x16/x16). I am wondering will adding a third GTX 780 to the Pci-express x8 slot bottleneck the performance of my GPU significantly? What about pci-express x4?

More about : pci express bottleneck high end gpu

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a b V Motherboard
February 16, 2014 9:06:13 AM

An old PCIe 1.1 x4 slot would bottleneck a 780, but likely not cripple it.
Anything strong than 2.0 x8 and you're fine.
Check out the data for a Radeon 7970/ GTX 680.
http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI...
Hopefully the next generation Maxwell cards will be significantly stronger.
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