I am currently using a DFI Lanparty DK P35. Being that it is a P35 motherboard, it does not have a pci-express 2.0 slot. My video card is quite aged (ATI X850 XT) and I was planning on picking up a new one. My question is, if I were to slap an HD3870 X2 in my system, how much worse would it perform than if it were in a 2.0 slot? I am wondering if maybe I should switch to a different motherboard that supports pci-express 2.0 (the MSI P7N 750i looks pretty nice).