Are PCIe 3.0 graphics cards compatible with PCIe 2.0 motherboards?
Question by Osama Javaid /

Are PCIe 3.0 x 16 Graphics cards compatible with PCIe 2.0 x 16 motherboard slots? If yes, what are the cons?

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Answers (11)
  • James Maciel

    yes but it will only run in pcie 2.0 which means half the bandwidth.

  • Dave Rimmer

    Is this resolved as the answers given should resolve this matter, you should have no problem what else do you need.

  • Gustav Brändström

    Yes. The PCIe is compatible both ways. YOu can use a GPU with 3.0 on a 2.0 MoBo, and you can use a GPU with 2.0 on a MoBo with 3.0. I belive it goes for 1.0 as well.

  • Antonio Iacobone

    yes, gpus with pci-e 3.0 are backward compatible with pci-e 2.0 slots on motherboards. I’m using a 7850 pci-e 3.0 on a gigabyte ma-790fxt ud5p with “only” 2.0 pci-e with no problem! Maybe you loose only 0,5fps or 1 :)

  • Antonio Iacobone

    Yes, gpus with PCIe 3.0 will work on motherboards with only PCIe 2.0. You won’t see any difference…maybe 0,5-1fps lower…because the bus PCIe 2.0 is not limiting card already

  • Dimal Chandrasiri

    it’ll support bt your won’t benefit the full potential of the Graphics card. that will create a bottleneck in your system.

  • bonioloff

    Yes, it must be compatible.. But i never try..

  • ferdinan Sitohang

    From the explanation of PCI it self, it says that PCI 3.0 is “backward compatible with existing PCIe implementations”.

  • Matt Smith

    Yes, they are. They won’t have access to PCIe 3.0 bandwidth, but I don’t think that’s an issue with any current video card.