I have tried altering the idle cycle limit from 16 to 256, the LTD/FSB to 3x instead of 4x, the 0.03v enabled instead of disabled, drive strengths of 7 and 1 and 8 instead of auto all at 250Mhz with various voltages from 3.3v to 3.5v. Timings have been adjusted with TRAS 6. The system refused to get to the "updating bios" part of the bootup and sometimes refused to restart with constant beeping noises. Out of curiosity I tried 245Mhz which reached memtest which then gave tens of thousands of errors on test 5. I then put it back on 240Mhz and I was fine again.