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

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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  1. You will have to change voltages among other things.... read an overclocking guide
  2. I could not find the voltage options though.
  3. Pappagaming said:
    I could not find the voltage options though.

    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.
  4. Yes it can overclock, it has an entire section for overclocking and it's a asrock h61m-dp3/asm and yes i have a pretty good aftermarket cpu cooler.
  5. Best answer
    esco_sid said:
    Pappagaming said:
    I could not find the voltage options though.

    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.


    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.
  6. Pappagaming said:
    Yes it can overclock, it has an entire section for overclocking and it's a asrock h61m-dp3/asm and yes i have a pretty good aftermarket cpu cooler.


    No actually h61 you wont be able to it is a low end motherboard.
  7. 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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