I recently installed Halo:Combat Evolved and Doom 3 on my computer which I thought was pretty good and would run games really well. Unfortunately, I have to run Doom 3 on 640 resolution and Halo on 800, disabling high quality textures and shadowing, etc. Even then they are still really choppy. I have a P4 2.8 Ghz, Windows xp pro, 512 RAM, 800 Mhz FSB, GeForce FX 5600 128 Mb video card, and plenty of hard drive space. It's really annoying that I paid about a thousand dollars for it and it has really crappy quality. Please send help before I put my head through my monitor. Thanks.