gillhaj, as jaquith said, if the question is to significantly help you out with running games faster then (within reason!) it's not really the motherboard choice (for your current components) that will help you - it's primarily the CPU and GFX card and a reasonable RAM size.
--> why are you loking for a motherboard replacement?
--> we need more info to help you better.
Thanks for the replies guys apologies that I wasn't clear in the original post I'm currently running the hardware above with the d975xbx mobo but also have the other 2 lying around my place so was wondering if I was to switch the mobo would I see an increase in performance ? I can run BF3 it just has a few issues here and there
it's primarily the CPU and GFX card and a reasonable RAM size.
I agree it's 'primarily' the CPU & GPU(s) and amount of RAM, but also keep in mind the e.g. GTX 670/66Ti or HD 7950/7970 is going to be bottlenecked by the 'ideal' GPU(s) for BF3 with your X6800. My best 'bottlenecked' guess is 25%~40% over a current Intel 2-core or higher CPU. As far as any of the MOBO's any that will support 8GB of RAM e.g. 4x2GB DDR2; anything >4GB requires a 64-bit OS.
BF3's RAM usage: (3.0GB~3.5GB BF3 & Map + 3.0GB~3.5GB Shared RAM to GPU(s) + 1.0GB~1.5GB OS and Background Apps) or 8GB is the minimum 'ideal' amount of RAM.