So whenever Im questing in WOW it runs perfectly, but whenever i enter and instance, i have between 5-45 min until my screen goes black, comp goes into sleep mode then restarts saying windows has recovered from a serious error. the vid card i have in my comp (which is old, dell xps 400 with psu and ram upgrade) is the geforce gtx 650 ti. Im wondering if the card is too much for my comp and ive been looking at dropping about $1200 on a new comp and transferring this card over. does it sound like the prob is a faulty card or is the card just too much for my current POS pc?