Why can't my I5 2500k go over 3.7ghz

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Pappagaming

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When I go into my bios to overclock and I change the 3.3 (because that's what the 2500k is originaly clocked at) to 4.5 and then I click the exit and it will only let me go to 3.7 How do I unlock the 4.5 ghz? also I have an asrock motherboard.
 
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Quixit


BLCK overclocking Sandy Bridge doesn't work very well, you can't push it very far. I used to have a 2500K that clocked at 4.4Ghz at stock voltages and most of the chips did have a lot of overhead even without raising voltage. The H61 chipset doesn't support changing the multiplier settings so if you really want to overclock that chip you're going to need a P67, Z68, or Z77 chipset motherboard.
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esco_sid

esco_sid

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May 11, 2012
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First off can your motherboard even overclock what model is it ?
I believe non overclocking ones from the 2500k days could only do BLCK.
By the way never set drastic overclock like that straight to 4.5 without knowing what you are doing.
 
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Quixit

Quixit

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Dec 22, 2014
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BLCK overclocking Sandy Bridge doesn't work very well, you can't push it very far. I used to have a 2500K that clocked at 4.4Ghz at stock voltages and most of the chips did have a lot of overhead even without raising voltage. The H61 chipset doesn't support changing the multiplier settings so if you really want to overclock that chip you're going to need a P67, Z68, or Z77 chipset motherboard.
 
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spiketheaardvark

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Apr 14, 2009
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To add to the consensus, concerning the chipsets for Sandybridge the only ones that could overclocked the CPU by multiplier were the P67 (and a later released Z68). The others will let you up the multiplier 1 step more than stock (K series or not). (My 2600 on a H67 can be set to 35 and that's all I get no matter what I put in) This gives you four more bins of frequency. So in my case with four cores active I get 3.4 + 0.1ghz, but single core in turboboost I get 400mhz. This is likely why you are only getting to 3.3 + 0.4 = 3.7 .

https://en.wikipedia.org/wiki/LGA_1155
 
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