Not all chips overclock the same, take for instance my E8400 which maxes out @ 3.8 where as others have gotten theirs to 4.2 or more. What voltage do you have it set at? Have you increased the NB voltage?
well i have the go stepping and the temps says at 33c idle 50c load.
i think the mobo or ram is causing it not to let me oc much it further.
cpu voltage i put to 1.5v mem voltage 2.10v nb voltage 1.45v sb voltage 1.6v
And... whats the VID? Use Real temp, or Core temp to find out.
Knowing the VID will allow you to guess at the voltage required for a certain speed.
And then, a NVidia chipset board, that alone makes the over clock very hard to get done, when going for higher speeds.
To test your VDrop and droop, you need to hit the Bios, disable all spread spectrum junk, all CPU options, including C1e, Speed step, and EIST if you have it.
Then you check to see what you have the CPU voltage set to in the Bios, once you know its value, you can boot to windows, and after a minute to boot, check with CPUz and see what your windows Idle Voltage is.
Once you know this value, run Prime 95 small ffts torture test on all 4 cores, and after a minute of running, list the lowest value you see CPUz list your Core Voltage as.
The first is Bios VCore to idle windows, and reflects Vdrop. The initial drop in voltage from the Bios to windows idle.
The second is the further drop in voltage from idle windows to fully loaded on small ffts. That reflects VDroop.
Knowing these can easily let you know where the voltage parts need to be!