I have just replaced my 9800GTX with a GTX260 216 and when under load for instance the Half Life 2: Lost Cost stress test or FurMark the machine will lock up and display a single colour on the screen. When running FurMark with GPUZ running the temps hit 60oC but I notice its pulling in 75-80amps, surley this can't be right? My PSU is a Antec Basq 500w with 36amps on the 12v rails. Any ideas?