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Sandy bridge - 'K' versus non 'k' version

post #1 of 5
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I have to admit - I am a bit uneducated on the Sandy Bridge side of the picture. My buddy was looking for a sandy bridge and it was a i5-2500 (without the 'k'). I told him NOT to go for it because my understanding is that the non-k version (locked multiplier) has no overclocking head room. But then I started to think my i5-750 is a locked multiplier, but I was able to get easily from 2.6 to 4 Ghz, which is about 35% overclock. So, will a Sandy Bridge locked multiplier be able to achieve the same? Or has the system architecture changed so much that without an unlocked multiplier it is not possible to achieve that much overclock?
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post #2 of 5
sandy bridge oc are only on the multi so the non k versions dont oc much if at all
post #3 of 5
The bclk on the sandy bridge is much different from the 1156 chipset - its adjustable ~ 5% - so you can go up to 105 though it frequently doesn't work correctly. Intel did this to make you pay extra for an unlocked multiplier as well as for other reasons.
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post #4 of 5
Yes, I set my multi to 38 and the baseclock to 105MHz to get 4GHz @1.2v.

However, the k version is a lot less hassle. But it's a myth that you can't OC these chips, you just can't go crazy.
    
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post #5 of 5
you will be able to overclock, but not has much as a K series or the 750 you have. I'm not 100% sure but I think with the ''non-k'' series you can't overclock pass .3 or .4 ghz.
    
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