I am trying to overclock a q6600 G0 stepping with a 780i motherboard and I am having trouble getting over 3.0ghz. I know heat is not a problem because when I run Prime95 I do not get above 42 and I am running at 25c idle. Here are my settings: CPU core: 3006 MHz FSB: 1336 QDR MHz Memory: 890.667 MHz G.Skill DDR2 SPP PCI-E: 3125 MHz MCP PCI-E: 2500 MHz Gpu: 8800gt GPU core: 685.00 MHz GPU memory: 1000 MHz Voltages: CPU: 1.3V Memory: 2.025V FSB: 1.4V HT(SPP-MCP): 1.2V PCI-E: 1.4V nForce: 1.5V AUX: 1.5V No matter what I do I can not get a stable overclock above 3GHz. I have upped the voltage and tried QDrs between 1334MHz to 1514MHz. When I do set them higher windows vista seems to start then it will restart the computer. I am not sure what the problem is I have set the voltages for everything in the chipset to the higest they will go and still no stability. Any suggestions will help. Also I have the memory unlinked and running at 4-4-4-12-2T and when I was overclocking I loosened the timmings to 5-5-5-15-2T. I disabed CE1 and Speed Stepping. PLEASE SOMEONE HELP ME!!!!!