Advice on Crossfire PCI 2.0 or PCI 3.0

Hello all,

I currently have a Core i5 2500k Sandy Bridge and a Gigabyte Z68MA-D2H-B3 and 2x Asus Radeon 7950 cards.

The Z68 will support crossfire at dual 8x with PCI 2.0.

My question is if I upgrade to a 3rd gen Core i5 processor and a motherboard that will support Dual 8x with PCI 3.0, will I notice a big performance increase vs the PCI 2.0.

I'm sticking to Dual 8x due to my budget and mobos having Dual 16x are just out of my price range.

For example this mobo ASRock Z68 EXTREME3 GEN3 and this processor Intel Core i5 3570K for PCI 3.0 and crossfire Radeon 7950.
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  1. Best answer

    You will -not- see any real world difference between PCIE3 and PCIE2.

    Upgrading your I5 2500K to IB would be worthless - as you already have a pretty powerful CPU. IB has about 7% better IPC than SB, but also uses less power.

    Basically IMO it would be a big waste of money for you to upgrade now. Toms reccomends upgrading your CPU which is at least 3 tiers above your current one. IB is probably just 1 tier above the i5 SB.

    If your going to upgrade - wait for haswell next year.

    One more thing - depending on resolution, you probably won't notice a difference. For example - at 1920x1080 for my resolution - I can max out all my games on Ultra(my specifcations are in my sig). My setup is actually quite similar to yours.
  2. Agreed, you have some of the best performance out there. You will not realize appreciable improvements by upgrading now. You are good for a couple of hardware generations, IMHO.
  3. Best answer selected by Sillybearito.
  4. I'll sit on what I have in that case. Thanks for the quick replies!
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