experts need help! I turn on my pc and started playing nba 2k14 with medium settings with a 6 minute quarter length, on the 4th minute or so it starts to lag or play in slow motion. even when im playing farmville 2 on facebook its the same. my gpu is a sapphire r-7 250x, msi 880gms-e41 and phenom 2 x2 555 for my mobo and cpu with 4gb of ram and a generic 500w psu. tried a different gpu, an hd6570 and same thing, it lags after 5mins after turning on the pc or after restarting it. tried my gpu on a different pc and it works fine. so i think its not the gpu. probably the other components. pls help..TIA!