I'm new here and i need some advice on upgrading my cheap pre-built pc(still a student can't afford beast pcs). I looked it up and I have a compaq pc with a ms 7525 motherboard with a 775 socket. My gpu just died and i need some help in upgrading my ram, cpu and gpu. I read about cpu bottlenecking and compatibility as well. I have an old pentium cpu i forgot the model but i want to replace with a intel core 2 quad q9500, is this compatible? Also about my gpu, i want to buy a gtx 660. I read from a website that my motherboard doesn't support gtx 700 series and up About my ram: it already has a 2gb ddr2 ram and one remaining slot, do i have to buy a ddr2 ram or can i place it with something like a ddr3 or 4 raam? Lastly, what other things do i need to consider when upgrading. Do i have to consider about the power system thingy. Still a baby when it comes to pcs. I want to play gta v, wd2 and other games. For a low budget. I highly appreciate help.