Been Clocking this board a while at 4Ghz, you can probally see in my specs, anyhow to the point, cant seem to keep the fsb set in bios, used the jumpers set at 200, this allows me to adjust above 200 no probs. But to set lower it wont, it just reverts to 200, so i presume jumper over-ride. So i set it to 166 on jumper and try to set at 190 in bios, it wont. reverts to 166 all im tryining to do is run my ram just lower than 1000Mhz because of ratios and the likes i set the fsb at 166 then clocked up the X on the cpu to 24x then i get about 995Mhz on Ram side, but the cpu is only 3.997Ghz and im after a 4.2 - 4.5 Ghz im stumped to why i cant set fsb with bios/ or am i missing some major point of why i cant.. erm edit : currently reading about x58 oc in forum tut, but no wiser yet on issue edit : so its not practical to multiply high with cpu with a low bclk like im doing, it will oc more,,, errm interesting wondered why the temps where higher but i had to lower the volts to cpu... interestin ! interesting read the x58 doc, its been a while since i brushed up on hardware bus's. i cant even get fsb over 200 just wont lock to anything but wot the jumper set it as.. googled, read posts on here from searching and also other forums OC and the likes.. im stumped.