I just recently built a new system and have my e6600 running at 3.2 ghz. My ram is holding me back from going any higher but the cpu voltage is only a tad higher than stock and it is running cool. I have a different mb than you but it should not be that much different so I will list my settings and you can try them out. FSB is at 400 and multiplier at 8 giving 400 x 8 = 3200mhz. My ram is running at a 1:1 ratio with the fsb so that would be 400mhz... ddr2 speed = 800 mhz. If you have pc6400 ram you should be good to go. Some ram will not overclock well, like mine which is why I am running at a 1:1 ratio to keep it at 400 mhz. You may have to bump your fsb and mch voltages up a bit also. Do this preferrably from the bios. There are a lot of good overclocking guides and info out there, just google them and good luck.