Hi all !
I have been able to easily overclock my E8400 E0 CPU to 4,5GHz : the system is very very stable and works great!!

Only a little trouble with memories: I have Crucial Ballistix DDR3 memories with default clock of 1800MHz and 8-8-8-24 timings @ 1.9V. If I overclock them to 2GHz @ 8-8-8-24 (or even 9-9-9-28) @ 2V the system boots fine and pass all bench / torture tests, but after a period of normal use I have PC freeze... So I think it's a problem of voltages...

In fact, in BIOS ALL voltages, except vcore and vdimm, are set in [auto]. What other voltages do you suggest to modify? For example PLL, FSB Terminator Voltage, NB Voltage, SB Voltage,... all to be stable at 2GHz?