i have intel core i5 processor with intel dh55tc motherboard and ati radeon HD5770 as GPU. can anyone please tell me if my board or processor supports my graghics card? because i had previously ati radeon HD5450 card and i faced problems like the screen suddenly freezes while watching a video on youtube or a movie in blu ray player.. not only that.. my mouse pointer/cursor would become bigger in shape and size after working in the computer for about 10 minutes or something. then recently i changed my grahics card to ati radeon HD5770 and my PSU to coolermaster 600w.. still the mouse pointer becomes big and it hangs sometimes. when it hangs, the pointer response becomes very slow too.. the whole computer freezes. the other day even i saw a purple screen with vertical lines. can anyone help me here please????