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PCIe 2.0 and 3.0 GPU

Hello,

I'm currently looking into either buying a GTX 680 or a GTX 770 to replace my rather old GTX 560Ti, I will be aiming to run games such as BF3 and BF4 at 120fps.

However, when looking into the graphics cards, I soon realised that they were designed to be used with PCIe 3.0. This is a problem as my current motherboard has PCIe 2.0 ports. I know that there is backwards compatibility between PCIe 3.0 and 2.0, but how much will this effect the performance of the cards? Will I be losing potentially 20+fps or 0-5fps?

Replacing my motherboard wasn't exactly one of my top priorities at the moment, replacing the graphics card and monitor will be costing me around £600-£700!

Any help/wise words would be appreciated :)
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  1. Best answer
    If you have a PCIe 2.0 slot, you'll lose no performance at all. You only lose performance if you have a PCIe 1.0 slot. This is because cards at the moment (except perhaps the GTX Titan) don't even fully utilize the bandwidth of PCIe 2.0 - they are branded as "PCIe 3.0 compatible" simply for marketing and gimmick reasons. You'll be fine! :D
  2. JRAtk94 said:
    If you have a PCIe 2.0 slot, you'll lose no performance at all. You only lose performance if you have a PCIe 1.0 slot. This is because cards at the moment (except perhaps the GTX Titan) don't even fully utilize the bandwidth of PCIe 2.0 - they are branded as "PCIe 3.0 compatible" simply for marketing and gimmick reasons. You'll be fine! :D


    Thanks for your help, very much appreciated. Now to endure the waiting game that is waiting for the prices of the 'old stock' to drop...
  3. adrastusUK said:

    Thanks for your help, very much appreciated. Now to endure the waiting game that is waiting for the prices of the 'old stock' to drop...


    No worries! :D
    Aha, I know that game very well :lol: it is a game worth playing though!
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