the system is a i7-860 with 2 gtx 260's. has been in this configuration for over 6 months without fail. in the past week system has become horribly sluggish. first noticed this while playing sims 3 and folding game kept freezing for 5 seconds every 10 to 15 seconds. with gpu-0 off systems runs fine. gpu-0 also folds as it should but makes the systems sluggish as stated.