I am looking for an cheap upgrade for my gpu,atm i have an r7 250,and i have found an r9 280x that has overheating issues.He is selling the gpu for 98$.I know to fix this problem but I am not that sure about this one,seems to be an easy fix,what should i do?Should I risk 98$ and try to fix it or get an HD 7970 that was used for mining too but it costs 130$,i am an student every $ counts.