My build is 6 months old. I was playing ac origins and a burning smell came out then the SCREEN turned WHITE and froze. After restarting everything WORKED fine but when I loaded ac origins again the screen froze with a different colour (different colours everytime). I am able to play minecraft and operate minimal GPU usage apps but when I load heavy games the GPU stops working and screen freezes untill restarting. PLEASE what should I do? Any suggestion will be appreciated. Thank you.What GPU ? ?...What PSU ? ?
Both if new are likely still under warranty.
You can test each seperately in another PC.My GPU is gigabyte Gtx 1050ti windforce oc and my psu is the only outdated COMPONENT in the build, it's 8 years old and its not of a popular brand, it's 450w.I would upgrade it then...longer you run it as is the more you risk damaging the card.If it was a budget PSU to begin with then it's not a true 450W in any event, that's likely just the peak it can absorb - not continuous output.

Definitely replace it with a known good one to test with, if you do replace it then don't cheap out on it - you don't have to go crazy.