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Can a PCI Express 3.0 x16 work in a PCI Express 2.0 x16 PCI Express 2.

Ok so right now i have a gtx 550ti and was wondering if i could upgrade to a gtx 670. But my motherboard has a PCI Express 2.0 x16 and the gtx 670 is a PCI Express 3.0 x16. So will the gtx 670 fit or no. I also did not mean to add PCI Express 2. at the end of the title...
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  1. A Hamburgl3r said:
    Ok so right now i have a gtx 550ti and was wondering if i could upgrade to a gtx 670. But my motherboard has a PCI Express 2.0 x16 and the gtx 670 is a PCI Express 3.0 x16. So will the gtx 670 fit or no. I also did not mean to add PCI Express 2. at the end of the title...

    Yes, it will work. PCI-E 3 is basically theoretical at this point and 2.0 is just fine for all cards.
  2. All PCIe specifications are forwards and backwards compatible. PCIe 3.0 uses a different encoding scheme than PCIe 2.x and 1.x but the controllers will negotiate that.
  3. Best answer
    There are always some exceptions, these are few and far between. Sometimes a certain motherboard wont like running X or Y GPU but generally they are all backwards compatible.
    You shouldn't get issues with a 2.0 slot, it tends to be 1.1 and lower where the issues start. As I said even then very few and far between.

    I just mention it so that you are aware there is not 100% compatibility right across the board. Always check if you are unsure.

    Mactronix :)
  4. Best answer selected by A hamburgl3r.
  5. So should I assume that PCI Express 2 cards will work in PCI Express 3 slots with no problems?

    Please excuse me butting in here.
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