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Theoretically Overclocking a 2500k

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July 17, 2012 9:20:02 PM

Hello, I am rather new to the PC building scene. Now, I am interested in oc'ing my hypothetical i5 2500k. I was wondering what exactly it is that I need to do such a thing and how to do so. Any help would be much obliged.

Currently, the parts I am planning on using are:

ASRock Z77 Extreme6: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



i5-2500k: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



SuperClocked GeForce GTX 570 (Fermi): http://www.newegg.com/Product/Product.aspx?Item=N82E168...



CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



CORSAIR Professional Series Gold AX750: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
July 18, 2012 2:26:56 AM

good mobo, good cpu, good psu - check.

i dont see a cooler though, you're gonna need a liquid cooler, i recommend an h60 so u can OC past 4ghz and not melting your cpu
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July 18, 2012 2:27:51 AM

and btw 16gb of ram isnt necessary imo, 8gb is good enough unless you're gonna make a ramdisk or something
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July 18, 2012 3:00:51 AM

fallen17754 said:
i dont see a cooler though, you're gonna need a liquid cooler, i recommend an h60 so u can OC past 4ghz and not melting your cpu


Um, no. The H60 is just 1C cooler on average than a Hyper 212 Evo at nearly twice the price. Add a second fan to the 212 Evo and the 212 Evo beats the H60 by a degree or two under load.

Both are good for around 4.5Ghz on most 2500K's quite easily and a large margin can go higher (I have a 212 Evo in push/pull and I can go higher than my current 4.5 if I wanted, I just don't NEED to. My load temps in Prime 95 @ 4.5 are in the high 50's and low 60's with an ambient temp of 76F).

The main point is DON'T get a H60 unless you can't fit a 212 Evo in your case.
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July 18, 2012 3:21:13 AM

Example of bad advise:

fallen17754 said:
good mobo, good cpu, good psu - check.

i dont see a cooler though, you're gonna need a liquid cooler, i recommend an h60 so u can OC past 4ghz and not melting your cpu


Example of good advise:

DJDeCiBeL said:
Um, no. The H60 is just 1C cooler on average than a Hyper 212 Evo at nearly twice the price. Add a second fan to the 212 Evo and the 212 Evo beats the H60 by a degree or two under load.

Both are good for around 4.5Ghz on most 2500K's quite easily and a large margin can go higher (I have a 212 Evo in push/pull and I can go higher than my current 4.5 if I wanted, I just don't NEED to. My load temps in Prime 95 @ 4.5 are in the high 50's and low 60's with an ambient temp of 76F).

The main point is DON'T get a H60 unless you can't fit a 212 Evo in your case.


There is a ton of info on overclocking the 2500k out there. It is probably the most overclocked chip. Before I even ordered my 2500k I spent 2-3 weeks reading everything I could about the chip and the motherboard I got. Ryan has a great guide stickied for overclocking the 2500k/2600k on an Asrock board. This is another one of my favorites:

Asrock Sandy Bridge/Ivy Bridge Guide

I used the latter because they are two different ways of overclocking, and it suited my needs more. Read read read is the best advise anyone can give you. If you want some documented stable overclocks to look at (never try and duplicate anything, every chip is different) we just started the intel overclocking club which is stickied here, and we have everyone's settings documented.

On that Note, I believe everyone running 4.7 and lower are all using Air cooling. My validation is using a Cooler Master Hyper 212+ with two fans. (but the 2nd is just for show)
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July 19, 2012 1:04:12 AM

Simply wondering, with that PCU, could I SLI the 570's? And another question, should I keep the 16 GB of ram? I simply want to be able to run the latest games, and perhaps a browser in the background.
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July 19, 2012 1:33:40 AM

the-misanthrope said:
Simply wondering, with that PCU, could I SLI the 570's? And another question, should I keep the 16 GB of ram? I simply want to be able to run the latest games, and perhaps a browser in the background.


There isn't a need for more than 8GB of RAM if your intentions are some multi tasking and games. I use about 2.3GB of my 8 at idle, and maybe 4-5 at the most when gaming and multi tasking. 16GB is only more justifiable when you're running virtual machines, or doing some video encoding that is going to take advantage of more available memory.
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July 19, 2012 1:44:02 AM

Say I were running FRAPS, would that have an impact on the FPS? So, with that PSU, with that build could I SLI the SuperClocked 570?
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July 19, 2012 2:50:17 AM

sam_fisher said:
There isn't a need for more than 8GB of RAM if your intentions are some multi tasking and games. I use about 2.3GB of my 8 at idle, and maybe 4-5 at the most when gaming and multi tasking. 16GB is only more justifiable when you're running virtual machines, or doing some video encoding that is going to take advantage of more available memory.


I'll argue against this. A budget build yes, 8GB is the way to go. RAM is not that expensive, and its better to have a little extra instead of not enough. If your gonna blow $400+ dollars on a graphics card, then what is an extra $50 for RAM? Especially when you use an SSD, which kills page filing, so by some chance you do hit that 8GB mark, your screwed.

You should also do RAM in 2 slots if possible, 2 x 8GB or 2 x 4GB, unless you have a 4 channel CPU like the 6 core i7 (think thats the only chip that uses quad channel...). This will also give you the option to upgrade to 32GB if that time ever comes.
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July 31, 2012 4:08:25 AM

You definitely DON'T need a Water Cooler to push the 2500K, a good air cooler can push it to 4.5GHz or further. I've even seen a couple 5GHz OC's running on air.

Also, don't get those GTX 570's. For less money you can get the Radeon HD 7870 GHz edition which in about every benchmark I've seen outperforms the GTX 570 by a healthy margin. Or if you swing up in your budget you can get a Radeon HD 7950 which is almost on par with a GTX 670 FTW. And if you really have budget room, the GTX 670 is $90 more, and way more powerful. Any of those three cards is a much better choice then a GTX 570.

Heres a bench of the 7870 destroying the GTX 570 for $40 less http://www.anandtech.com/bench/Product/518?vs=548&i=371...
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August 1, 2012 10:35:11 AM

the-misanthrope said:
Hello, I am rather new to the PC building scene. Now, I am interested in oc'ing my hypothetical i5 2500k. I was wondering what exactly it is that I need to do such a thing and how to do so. Any help would be much obliged.

Currently, the parts I am planning on using are:

ASRock Z77 Extreme6: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



i5-2500k: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



SuperClocked GeForce GTX 570 (Fermi): http://www.newegg.com/Product/Product.aspx?Item=N82E168...



CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600: http://www.newegg.com/Product/Product.aspx?Item=N82E168...



CORSAIR Professional Series Gold AX750: http://www.newegg.com/Product/Product.aspx?Item=N82E168...


Theoretically you don't actually need some of what you've listed!

If you're just going for a 2500K you don't really need that ASRock motherboard consider this one.

Saved some money there didn't we, you also do not need 16g of system memory even for a Win7 64bit OP/SYS, so hypothetically you did mention overclocking and here is some of the best overclocking memory out there.

Oh my goodness! :o  Hypothetically we just saved money again! :o 

Guess what we can theoretically do with that saved money!

Now to the reality!

A i7 2700K very easily clocked to a 4500mhz 24/7 stable with Hyper Threading enabled and on good air cooling, is knocking on the performance door of a i5 2500K not so easily overclocked to 5000mhz with high end cooling!

Let me say that again, because this is fact not theory!

A i7 2700K very easily clocked to a 4500mhz 24/7 stable with Hyper Threading enabled and on good air cooling, is knocking on the performance door of a i5 2500K not so easily overclocked to 5000mhz with high end cooling!

Understand? Ryan

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August 1, 2012 1:45:39 PM

+1 but the question is , is he a gamer or not if hes just gaming just go for the i5 2500k no need for the i7 2700k should save that money for a better gpu if he can .
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August 2, 2012 10:57:32 PM

Best answer selected by The-Misanthrope.
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