The multiplier is not locked down so to OC it, just raise the multiplier. That's how so many are running it in the 4.5Ghz range and the suicide run guys are running it in the 5Ghz range. Even Intel's most expensive CPU can't compete with the unlocked multiplier 2600k when it's running at such speeds.
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MSI P55-GD65 with i5-750 @ 4.0Ghz vcore 1.4
Xigmatek Balder HS/2 120mm fans, Antec EW PSU EA750 750W
PNY 16Gb DDR3 1333
One Samsung 840 250GB SSD, one 750Gb WD Black, two 1.5Tb LP Seagates
Gigabyte GTX 460 1Gb OC to within an inch of it's life
Lite-On 24X DVD burner, LG 12X Blu-Ray burner
COOLER MASTER Storm Scout
Win 7 Pro 64
Lots of fans spinning with little LED lights blinking
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