well i did finish alot of games in last few months :
COD 4 : runs great on low end machine
Supreme commander Forged Alliance : need a fast CPU
orange box : runs great on low end machine
crysis : runs great on low end machine on low setting but terrible on the fastest machine on High/Very High
hellgate london : runs great on mid range machine but will run awesome after the 0.7 patch which comes out soon which fixes the memory issue
The witcher : runs crap on low end machine , needs a decent GPU
company of heroes opposing front : runs great on low end machine
Hitman blood money : need a mid range pc to run good
Medal of honor Airborne Assault : runs great on low end machine
World in Conflict : runs okay on low end but you want a high end machine. Very high runs satisfactory on high end machine
BioShock : runs great on low end machine
^^^
LAN machine tested :
E6600
2GB of ram
X1650pro