overclocking intel i5 2500k / with P8Z68V PRO

joshtoomer96 · Dec 3, 2015

Never overclocked before and been doing some research and still confused. My i5 2500k is currently at 3.3ghz and i was hoping to reach to reach 4.3ghz. To do this can i just change the setting of the clock speed to 43 and can i leave the voltage at auto? Also do i need to enable/disable any more setting or alter any in particular?

oh and my specs are:
-i5 2500k 3.3ghz
-asus P8Z68V PRO
-550w corsair vs
- be quiet Pure Rock Compact Intel/AMD CPU Air Cooler

Thanks in advance ...

envy14tpe · Dec 3, 2015

First off, I tink you can do a lot better than 4.3GHz. I'll bet you can hit 4.5GHz. That mobo is built for overclocking.

You might have to bump the voltage. Mine maxes at 1.38V Some say to play it safer than that but I've run this thing for 3.5yrs as such, and it has no issues.

It's been so long since I dialed in my settings, so its tough to make suggestions. But to start you just bump up the multiplier. However, I suggest googling...2500k overclocking guides. And play around with what you find until you reach something stable.

joshtoomer96 · Dec 3, 2015

Thanks for the reply, I have read some guides and i am just afraid it will cause damage if i raise it to 4.5GHz as i have not done this before? Do i need to change the voltage or can it be left at auto - most i read said only do 4.3ghz with 1.3V?
I have also read to enable turbo boost, is this suggested and the only other setting i need to change?

Victorion · Dec 3, 2015

joshtoomer96 :

First of all. 2500k is a great core of OC, and a personal favourite of mine.

You can easily push it to 4.3 Ghz, and you should do it with the multiplier.

As you have read, going further, can shorten the lifespan of the cpu, and I don´t really see the reason in a gains/risk ratio. However, most of the 2500k chips will easily clock 4.5 or even 4.7 ghz.

Once you´re done, just check temps are below 70c and you can run a stresstest if you want to further make sure your oc is stable

joshtoomer96 · Dec 3, 2015

thank you for your advice, would you just set the multiplier to 43 and then the voltage to 1.3V and if it boots and is under 70 degrees leave it as it is? also do i have to turn on or off turbo mode to do this?

Victorion · Dec 3, 2015

joshtoomer96 :

automatic voltage or 1.3
turbo mode is generally suggested to be turned off, by in my experience its different from board to board. Usually with it turned off, the core will run at full strength all the time. Try either.

4.3 is fine, 0.2 more won´t really give you any significant gains that justifies the risk.

joshtoomer96 · Dec 3, 2015

that makes sense to me, i was going to try 4.3 anyway to allow me to play games occasionally and then just general use most of the time! can i just double check you are saying i can just change the multiplier to 43 and turn off turbo mode, and then it will be overclocked correctly?

Thank you so much for your help, you have made this so much clearer!

Victorion · Dec 3, 2015

joshtoomer96 :

yeah it´s basically that easy, unless you really want to tweak it and get nerdy

Just remember to monitor temps, and if you want to be supersafe, running a stresstest with prime95 is generally suggested.

joshtoomer96 · Dec 3, 2015

I'll give it a go when I'm home! Sounds so much simpler than what everyone else has said altering the voltage so that's a lot mate

Victorion · Dec 3, 2015

joshtoomer96 :

Happy oc´ing, (and voltage shouldn´t be touched before you get more experienced)

joshtoomer96 · Dec 3, 2015

Thanks mate, everyone was saying that it needs to be done manually so stop overheating but I'll defiantly give it a go!

Victorion · Dec 3, 2015

joshtoomer96 :

well that´s why you have your cpu cooler, just monitor temps. I doubt they will be much higher than 63c, and anything below 70 is fine.

joshtoomer96 · Dec 3, 2015

Victorion :

Looks like my investment in a cooler was a good one lol! How long should I run the application to test it for and do I need watch it containually for temp?

Victorion · Dec 3, 2015

joshtoomer96 :

Depends on what your temps are. if it is below 65c under full load for 5 minutes, i wouldn´t bother any further testing, but if it is around 69c I´d keep an eye on it. If you´re in a country where it gets really hot during the summer, it´d be wise to test it in the summerheat as well, as the hot summer air may affect temperatures inside the cabinet as well.

joshtoomer96 · Dec 3, 2015

i have overclocked it to 3.2 with 1.29V and it is unstable, any suggestions?

Victorion · Dec 3, 2015

joshtoomer96 :

i5 2500k is 3.3 GHz stock-clocked with boost to 3.7

So if you´re at 3.2, you downclocked it, rather than anything.

Try this:

VCore: automatic or 1.30 - 1.32v
LLC : Ultra High
Multiplier : 40-46
Phase and duty controls: Extreme
EPU Power Saving: Disabled
E.I. Speedstep : enabled

envy14tpe · Dec 4, 2015

I have a low end Z77 mobo with my 2500k. And I'll share some of my BIOS pics. But keep in mind your BIO and proper settings will differ.

joshtoomer96 · Dec 4, 2015

Sorry I meant 4.2GHZ, I managed to get it to 4.3GHz at 1.24V and did a quick Intel burn test before I went to bed and got a high temperature of one core at 75 at high and 77 at very high.

Is this okay? (The applications said it was)

Victorion · Dec 4, 2015

safe temps for i5 2500k should be around 80-90c.
Each chip oc differently, and 4.3 is fine, though expections are generally that this chip will oc to 4.5 rather easily.

joshtoomer96 · Dec 4, 2015

Victorion :

4.3 should be plenty for playing a few games and I feel more comfortable with that. Was just worried about the temperatures as I read if it's over 70 to try and get it down to it?

Victorion · Dec 4, 2015

no, I was remembering safe temps on an amd core when I wrote that, i5 2500k will be fine below 80.
It will start to throttle when its unstable, and intel cores are pretty dam sturdy by design.

joshtoomer96 · Dec 4, 2015

I'll keep it as this then and hope it's stable enough as temps never went over go over 80! Should I only run at 4.3 when playing games and load the normal profile when I am just using it for general use?

Victorion · Dec 4, 2015

joshtoomer96 :

If you have speedstep enabled, the cpu should automatically downclock when it´s not under full load - either is fine really. Running at 4.3 all the time may shorten the lifespan a bit and use add a little bit on the electricity bill (under 5 bucks a year).

envy14tpe · Dec 4, 2015

4.3GHz is fine, but I think you could do better. However, it is a nice jump from the 2500k turbo boost of 3.7GHz.

As for temps, don't worry if it runs in the 70s. Mine only hits low 70s in summer time. Usually it tops, in gaming, at upper 60s.

overclocking intel i5 2500k / with P8Z68V PRO

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