My build is just 6 months old, I was playing ac origins and a burning smell came out and the screen turned white and froze. After restarting, the pc worked fine but it froze again with a different screen colour(different colours everytime) when I loaded up ac origins. I have no problem playing minecraft or using low GPU usage apps but the moment I load heavy games the GPU stops and screen freezes. My GPU is gigabyte gtx 1050 ti windforce oc and psu is 450 watts. I think it's either GPU or psu problem. Please what should I do? Any suggestion will be appreciated. Thank you.