PiraticaL :
And have an aftermarket cooler
i did remove my 667 dimms onto my other machine Athlon ii x2 245 @ 3.2ghz (2.9 stock)
and im on ddr2 800 2 dimms of 2x2gb on this intel core 2 duo e8400 (stock 3.00ghz) my voltages is 1.4 on cpu core
fsb is 445
ram voltage is 2.1v at 5-6-6-14 and still running good at 4ghz
and i have an aftermarket cooler which idle is 45c and around 60-70 on load
i have a gigabyte p35 ds3l with more oc options
and you should raise the voltage a little to get it to 4ghz