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How big is the performance difference between PCI-E 3.0 and 2.0?

I want to know how big performance hit does PCI- 3.0 has over PCI-E 2.0. The lame thing is that:-

1. I have a PCI-E 3.0 Motherboard (ASUS P8Z77-V),

2. PCI-E 3.0 Graphics Card
(ASUS Nvidia GTX 650 TIB 2GB DCU-OC2 Edition)

But not a PCI-E 3.0 Supporting CPU! :( (Intel Core i5 2310 @ 2.90 GHz)

I want o make a nice upgrade to i7 3770K as my old CPU is getting crappier day by day. It generates ultra high temps (110 C) after doing all I could!

I am also planning to upgrade to 2x GTX 650 Ti Boost 2GD5 DCU-OC2's via SLI (Hope that wouldn't be too buggy).

So, I hope PCI-E 3.0 will make a bit good effect over PCI-E 2.0 as 2x SLI over my GPU will be needing a lot of bandwidth
to perform good.

I also want to know that how nice games will run. I hope they're not too buggy as I wanna play games like Assassin's Creed Series, DmC Devil May Cry 5 and Saints Row IV on my custom resolution on a 1366x768 (19 Inch) monitor -
3600 x 2025 and Ultra High Settings.

Any experiences are welcome.
~Thanks.
5 answers Last reply Best Answer
More about big performance difference pci
  1. Best answer
    The performance difference will be very small; You'll need to SLI something like the GTX 780Ti to actually utilize PCIe 3.0.
  2. Eduello said:
    The performance difference will be very small; You'll need to SLI something like the GTX 780Ti to actually utilize PCIe 3.0.


    Well, if I had that kinda money I would do so definitely but I don't. Can the difference be calculated in FPS?
    And I'm talking about 2x GTX650 TIB, will that also be very "little" difference?
  3. We're talking about 1-3 fps between PCIe 2.0 and 3.0 when using cards like GTX 650 Ti Boost.
  4. That's.... Nothing at all! Who cares for 3 FPS? I thought it would make a difference of about 15 FPS at least!
    Still, I'll checkout more information on this.
  5. Achint2000 said:
    That's.... Nothing at all! Who cares for 3 FPS? I thought it would make a difference of about 15 FPS at least!
    Still, I'll checkout more information on this.


    Yeah, the PCIe standard is way ahead of modern GPUs.
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