Well its been about 6 months that i got a new graphic card it the 550 ti it has never gave me any over heating problems or anything like that it ran well for months but now i cant play any game at all for longer than 30 minutes because the whole computer freezes for like 3-4 minutes then after that small freez it lets me continue gaming for another few minutes but i want to identify if it's the video card or the really really cheap 40$ powersupply i have that's not even graded it's some chinese one. But i had no money at all for a better one so please help me all i want to know is what's causing the problem is it the psu not giving enought power to the card anymore?.
edit: even if i use msi after burner and pump the fan speed to 100 or something it will still happen so it's not overheat.
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Try using the GPU on another PC. Also try another Power Supply on your PC. Easier way to detect what's defective.
I do not have another pc lol i have a really old dell but the gpu would not fit or even work.