this all happend after i sent back 1 mb and cpu i have a asus a7n8x deluxe and a koolance water kooled kase setup i have my fsb set at 100 detect my processer as 1500 and runs at 40-50c i change fsb to 133 and detects it at 2100 55+ c i set fsb to 166 the correct setting and system wont boot

try taking ur battery out for 1 min and but it back or if u can get to ur bios set it to defaults and start again

i did reset bios 4 times does same thing every time i know my board and processor support 166 because that what there stated to run at

If its 55c idle at 133mhz there is something wrong with the hsf or hsf installation. Try running with the case open for now. Also try running it at 133 but increasing the multiplier from 13 to 16, which will get you to the rated cpu speed of 2.17g. If that works the problem is the motherboard or memory not the cpu or hsf. The board could just be overstating the cpu temp. If its really 55C the heatsink will feel fairly hot. Also check your autoshutdown temp in bios. Maybe its set to 60c and at 166 you're hitting it. Also try running the memory at a slower speed for now. It could just be that the board doesn't like 166 between the memory and the memory controller. Wouldn't be the first time. Also try running one stick of memory at a time. Hopefully one of these items will lead to the culprit. Let us know!