So I currently have a PC with these specs: Intel Pentium G2030 4gb Ram Amd Radeon HD 7870 250GB Hard Drive 520W PSU So I've been really wanting a PC that runs Mac OSX, so I've been considering upgrading my current PC to this: Upgrade CPU to i5-4430 Add 4gb more of ram Swapping motherboard for one thats good for hackintoshing. This will cost me about $270, plus I can sell the Pentium and Mobo for about $50-60 on eBay. Total cost: $210-$220 But I've also considered keeping my current GPU and selling my PC to a friend. I got offered $180 without the GPU. So I can get a 2008 Mac Pro with these specs for about $350-$400 Intel Xeon E5462 8GB DDR2 Ram 320GB HDD And I can stick the old GPU in. Cost: $170-$220 So they will perform about the same, but the CPU will be quite a bit worse. But how much would that affect gaming performance? I'm playing games like Minecraft, Dota 2, TF2, and I want to get GTA V for windows when it comes out. I heard you can overclock the CPU in Mac Pros, can you? And how effective is it? Also what's the best CPU I can upgrade to? Last of all can I run Windows 8.1 without any issues on the Mac Pro?