955 BE C3 overclocking question

[bigjimmyauk]

does anyone out there have overclock settings for 4GHZ that is relatively stable

i can boot to windows @4.2GHZ prime will crash instantly
i can get 30 seconds stable at 4Ghz under prime 95 and run super pi to 8 million with no errors just looking for someone thats done some fine tuning for 4Ghz

my current overclock is 3.84Ghz
240x16...... 2400Mhz nb @1.2V, 2400mhz HT ,1600mhz ram, cpu voltage 1.45V

was prime stable for 7 hours after which i cancelled the test with no errors

 

[Ast3r]

I think you'll need between 1.5-1.55v or even higher to get to 4.2Ghz prime stable.But imo the extra .2Ghz isn't worth the extra generated heat.You could instead try 4.0Ghz.That should be possible with 1.4-1.45v.I've managed to overclock the PhII 955 on my other rig with a Asus M4A79T Deluxe to 4.0Ghz with 1.48v.19x211Mhz and HT Link 2115.4Mhz.Mine is a C2 so yours should be able to run at 4.0Ghz on less than 1.48v.