Why can a i7 3820 oc but a i7 4770 not

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Mets12345678

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Jan 1, 2014
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I wanted to know why a i7 3820 can oc and a i7 4770. I was told that only k series processors are unlocked and non k series are locked.
 
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k1114
Non k cpus have a locked multiplier and the 3820 is no exception. With HW they removed the limited oc on non k that was present on SBE, IBE, SB and IB. X79 also has bclk straps while these are disabled for non k on z87.
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xcrossroadsx

xcrossroadsx

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Dec 13, 2011
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This is because the i7 3820 is actually a Sandy Bridge-E processor. This means that it is special in terms of chipset (x79 instead of z87) and that Intel has allowed for that SKU to have an unlocked multiplier for easy overclocking.
 
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