good it aint ur psu; @ those temps i believe it is ur HTT that is stoppin ur oc drop the ratio lower and raise the fsb u may b able to get a higher oc; yes 4 a939 A64 the HT needs 2 be round 1000 if it <usually> goes more than a 100Mhz higher u wont b able to oc further; its had been thought that most of the HT buses bandwith is actually redundant and there for future proofing dont b fraid to drop it 
DROP HTT RATIO AND RAISE FSB

DROP HTT RATIO AND RAISE FSB
