So after happily gaming away on my early 2008 mac pro Ive decided to take a look at upgrading. Specifically Planetside 2 is a real underperformer on the machine. Im look for a bit of help/advice as Im not very clued up on the hardware side of things, especially with the compatibility of certain aspects of the MP, Im sure these are really simple questions for you guys . So currently Im running Windows 8 only, the machine has a single quad 2.8, 8GB ram and a HD 5770. Firstly, the graphics card obviously is a bit outdated now, am I correct in assuming that I can upgrade to any card that requires a 2x6pin power connection? Specifically something like a 5770 or GTX 690? Also would I eventually be bottlenecked by the CPU at a certain point? Secondly Ive seen some references to overclocking the 2.8 to 3.24, which I think would be a nice performance enhancer, however from as far as I can see it cannot be done under Windows due to lack of a BIOS? Ive tried with SysTool which wont run and I cannot do the OC in MacOS and restart to Windows. The overclock Im talking about is this one: http://www.zdnet.de/39192217/exclusive-zdnet-overclocking-tool-enhances-performance-of-mac-pro/ Again Im sorry if these questions come up a lot, thanks for any help guys.