Overclocking the E4600 to 3.0GHz is relatively easy and all we were honestly required to do was increase the FSB in the ASUS P5K-E Deluxe BIOS to 250MHz. Leaving the memory multiplier as it was, this resulted in a memory frequency of 750MHz which the G.Skill memory was easily able to handle given that it is designed to work at 800MHz. When operating at 3.0GHz the E4600 demonstrated similar performance to the Core 2 Duo E6850 processor, which costs $280 US, so I guess for a $150 US processor this is a good result for the E4600.
Check it out at Legion Hardware.