I have ened up with ram at 266mhz, 3x HTT multi, and 287 HTT at rock stable. The temp under prolonged full load is 45 C. But, If I try to go to 288, it won't boot at ALL. At least if it booted and was unstable I'd say ok, but why go from rock solid at 287 to completely wont boot at 288?? any one have ideas? BTW i have a 300 watt Zahlman PSU, (which im thinking is it), but still the question remains why go from rock solid to complete no-go when upping by 1 mhz?