Alright here's my pc: Windows vista premium Pentium Core 2 DUO E4300 (1.8ghz with duo comes to 3.6 ghz) 4gbs ram dvd dual 320gb hdd I'm not sure about the graphics card, all I know is it's 256mb So will this run halo 2, also will it run call of duty 4 and portal?
You're card is good for Portal, and Halo 2 (You need Vista though, but if you already have it, just pretend this wasn't even written ), and CoD 4. But these are just rough estimates compared to my laptop. You can test it out even further by going here: http://www.systemrequirementslab.com/referrer/srtest
Your system should play these with no problems. I can run Halo 2 & Portal on my PC: AMD Athlon 64 3000+ @2.21GHz 2GB Corsair XMS natching pair ram Nvidia 6600 o/clocked Asrock K8Upgrade socket 754 motherboard Creative Soundblaster 4 sound card. So i wouldnt worry too much if i were you.