I have a HP p6210y with an AMD Athlon II X4 620 Processor 2.60 GHz with 5.75 usable RAM on a 64-bit Operating System and am getting horrible FPS issues with World of Warcraft. I realize I need to upgrade and am looking at a few things, but I have never done this before so could use some help please. I want to get a PNY - NVIDIA GeForce GTX 570 1.25GB GDDR5 PCI Express 2.0 Graphics Card and realize I need to upgrade my PSU. I was looking at a Corsair Professional Series HX1000W Power supply - 1 kW. Do I then need to upgrade my CPU? What will be compatible with my motherboard? I was hoping for an Intel Core i5-750 Lynnfield 2.66GHz 8MB L3 Cache LGA 1156 95W Quad-Core Processor BX80605I5750 but I don't know if it is compatible. I also don't know if all of this will even fit in my tower, lol! Please help!!!