i5 2500K First time OC

wildest_jjk

wildest_jjk

wildest_jjk

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6 Jun 2011
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Hi,

I was wondering if you could help me overclock my i5 2500K to get a bit more life out of it?

My motherboard is an MSI P67A-GD65 and I have a CM Hyper 212+. Hopefully that is all the information you need, anything else I can give as well.

I'm really worried about doing this as I don't want to fry it.

Any help will be greatly appreciated!
 
Google is your friend, there are hundreds of good guides out there.

Basically, you want to increase the turbo multiplier, you shouldn't need any extra voltage, turn the multiplier up until you lose stability. 4.4ghz should be easily achievable.
 
Go into the bios and up the turbo multiplier to 43 then start using the computer to play games or whatever. After a few hours if you have no stability issues then rinse and repeat and up the turbo to 44. Around 43-46 you will experience instability or a BSOD message, its at this point you need to start adding voltage to the cpu.
 
Don't worry about frying your chip- it's actually quite tricky to bork a CPU by OCing now, any erroneous settings will cause a boot fail or shutdown rather than toasting the chip.

For a start, go to your bios, change the turbo multiplier to 42, leave everything else on auto. Hit F10 to save and exit.
You are now at 4.2GHz. Volts and temps should be fine at this speed, but do use CPU-Z and Coretemp to keep an eye on things. (Max 1.42vcore and 75ish C)
 
I haven't got round to doing this just yet. One thing i have noticed is that my core clock speed keeps dropping whilst in games.

If I look at CPU-Z the core speed keeps dropping to like 1.5GHz. However my game keeps lagging etc. I have tried disabling EIST before but it seemed to make no difference at all. Does anyone know why this might be?

Thanks :)
 
Don't worry about that.
That's just EIST throttling the CPU back when the power isn't needed. Shouldn't cause any problems.
Lagging could be due to a number of things- GPU, drivers etc.
Which game you having problems with?
 
Ok stupid question now, I cannot for the life of me see the turbo multiplier option. Could it be something else?

There are options for all four course and also the core multiplier?
 
The core multiplier is 'Adjust CPU ratio' in the second screenshot.
Don't worry about the per-core ratios in the bottom shot, they always vary a little from the main setting.
If any help, I always kept C1E enabled with my 2500K... And get XMP switched on!
 
dougal1331 said:
The core multiplier is 'Adjust CPU ratio' in the second screenshot.
Don't worry about the per-core ratios in the bottom shot, they always vary a little from the main setting.
If any help, I always kept C1E enabled with my 2500K... And get XMP switched on!
Click to expand...

Thank you for your response :)

So the 'Adjust CPU ratio' is the same thing as the turbo multiplier? If I up that to 42 or something first then just see how my computer performs? No other changes are necessary?

And I should enable C1E and XMP?

Thanks :)
 
Yes, it is the same thing. You can set it to 42, with all the other settings on auto: most 2500Ks will do this speed no problem.
How much faster you can go depends on the chip- the 'silicon lottery', as it's known.

My old 2500K did 4.5GHz on auto settings without a hitch, although 4.6 was a no-no, despite my best efforts!
XMP should be enabled to get the best from your ram. C1E is not essential, but without it my chip wouldn't downclock when idle. Try it and see!
 
Ram is for another time....the CPU oc needs sorting now.

The 33 you see, change it to 42 and hit F10 and save, as was said before.

42(New number from 33) x 100 (base clock) will give you 4.2 overclock(4200). Plenty good for no extra effort. If you're happy with that boost then great, enjoy. If not, then you have to tinker with cpu voltages. If you're not content doing that then just stick to 4.2 overclock which is really good.
 
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