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Overclocking - am I lucky with my i5 2500k ???

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June 9, 2011 8:45:35 PM

Hello
This is my first build and my first ever overclock. Therefore I have read a couple of guides on overclocking, one of them says

"The unlocked CPUs have a selection of unlocked multipliers, ranging from 16 to around 57 (if you are lucky!)."

Here is the link to that guide:
http://www.clunk.org.uk/forums/overclocking/39184-p67-s...

My multiplier goes up to 60, does that mean I am really, really lucky. :D  :D  ?
Should my processor overclock better then most of the sandy bridges :D  ?
How far should my processor go with the hyper 212+ ?

Here is my setup:
i5 2500k
hd 6950
ripjawasx 4GB 1600mhz 7CL
MSI gd65
Antec truepower 750w
Cooler Master hyper 212+
June 9, 2011 8:53:27 PM

No, but when you overclock slowly move up by 1x each time. Then run prime 95 to make sure all of the cores pass and temps are not too high.
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a b K Overclocking
June 9, 2011 10:11:22 PM

Have you actually been able to set your multiplier to 60, so that you're getting a 6.0GHz overclock? That would be amazing. If you're just saying that your motherboard's OC software lets you try to set it that high, not so amazing.

Start with stock voltage settings. Move your multiplier up by 1 or 2 at a time until you reach a point that is not stable or won't boot. Then try increasing the Vcore (CPU voltage) a little bit at a time, not going much higher than 1.4 volts. Continue to increase multiplier and voltage in small increments until you reach your "wall" - the point at which you can't create a stable overclock.

Don't set your voltage too high! Try to stay below 1.4V for a "practical" OC.
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June 10, 2011 12:45:36 AM

Keep your peak Prime95 core temps below 75ºC and the CPU voltage below 1.4v for an everyday overclock that should last for years to come.

And I don't subscribe to the "overclock slowly in 1x multiplier steps" overclock method.

Try this:
1. Set CPU voltage to 1.3-1.35v
2. Set CPU multiplier to 45x
3. Save and exit

For most Sandy Bridge CPUs it's that easy to get 4.5GHz. Once you get there, either be happy with it or you can try for a bleeding-edge overclock. That one you should do more slowly as it usually requires more tweaking.
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June 10, 2011 12:56:38 AM

How come my x4 965 autoset to 1.43 Vcore, when you're suggesting less for a 2500K?
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a b K Overclocking
June 10, 2011 1:37:08 AM

Sandy Bridge is a brand new 32nm architecture, with many optimizations for energy-efficient operation. The default voltage for the 2500K at 3.3GHz is 1.2v.

AMD CPUs are still using 45nm process, so they need more voltage.
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June 10, 2011 2:36:10 AM

Because Sandy bridge processors are 32nm, while am3 processors are 45nm.
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June 10, 2011 4:55:59 AM

It really doesn't matter if the multiplier goes up to 100. What is important is how high you can go with decent voltage & temps, and w/o hitting your chip's specific multiplier wall
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