I just built a new computer, and when I play call of duty 4 single player, It freezes. Got A direct X error first time, Than the next no error but still locked up on me. It's frustrating because I upgraded my vid card. Specs-- Windows XP Home SP-2, Evga geforce 780i motherboared, Geforce 9800GTX 512mb Vid card, Intel duelcore E8400 processor 3.0ghz 2gb ram, 2gb on Its way. corsair 620w power supply.