THIS THREAD CONTAINS A RICKROLL (hardware question) I was playing Doom 3 recently and I noticed that it runs really chunky even at moderate resolution (actually, I have a suspicion that it's the fault of ATI's Catalyst driver thingy that I had to install to stop it from crashing all the time, I was sure it wasn't so slow before). Anyway, I'm sure it won't be the last game to run slow so I'm thinking of upgrading my system a little if I can do so relatively cheaply. I'm currently running: CPU: P4 3.0 Ghz RAM: 512Mb DDE1 Video: ATI Radeon 9600XT So, what's the one component that I would gain the most from upgrading? I'm guessing CPU upgrades are out because my motherboard is probably too old for multiple cores (Gigabyte 8IPE1000 Pro2). My RAM is DDE1, I don't think DDE2 is backwards compatible so I'll have to look around for older RAM. Might have a similar issue with the video card, it's AGP 8x if I recall and everything these days is PCI-e. Guess I'll be using eBay because stores probably won't stock older parts. P.S. This link takes you to Rick Astley's 1987 hit single "Never Gonna Give You Up".