I5 4670k + Hyper 212 Overclock

[Woofson]

Hi Guys, i want to overclock my cpu, i found guide, updated my bios, set multiplier to 44, vcore to 1.25v, input voltage to 1.9v, and during stress test one of my cores hit 100C so i stopped test immediately and loaded default bios settings.
This time i changed cpu multiplier to 42 and vcore to manual  1.15v (i also tried lower vcore but this looked like the most stable one), everything else on default (auto) settings, after i finished stress test i changed vcore to adaptive. This is what i got:

As you can see i run IBT on high x20 times, this is hopefully stable enough for daily use and gaming.

• This is only peak temperature and games should not put this much stress on cpu, so temperature while playing games should be lower, right?
• Is this temperature going to have impact on my CPU life?
• Should i now try to change cache ratio, cashe voltage, input voltage or leave it to auto?
• Why such a difference between core temps, i got bad chip or what?

[Faceman]

Vcore at 1.5v, you are crazy. Whatever guide you are using is bad. 

 

Haswell is a complete crap shoot when it comes to overclocking, your results are going to be unique to your chip, so go into this with an open mind.  Don't push your chip higher than 1.3v with just a 212 EVO.

 

WHENEVER YOU STRESS TEST, SET VOLTAGE TO MANUAL/CONSTANT!!!

 

WHENEVER YOU STRESS TEST, SET VOLTAGE TO MANUAL/CONSTANT!!!

 

WHENEVER YOU STRESS TEST, SET VOLTAGE TO MANUAL/CONSTANT!!!

 

Use these two guides:

http://linustechtips.com/main/topic/41234-intel-haswell-4670k-4770k-overclocking-guide/

http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics

 

 

     This is a long process, so be patient, start low and work your way up, don't start high or in the middle.  Don't delid or purchase a more expensive CPU cooler until you are sure that temperatures are the only thing holding you back.  Without sounding like I am gloating, I personally use an i5-4670k + 212 EVO and my 24/7 OC is 4.7Ghz @ 1.275v.  This is a good example of the silicon lottery, your results are going to be much more dependent upon the chip, and not the temperatures.  Temperatures are a big factor, but it is not the only factor.

[AMD Lover]

Yes will be lower while playing games instead, yes will impact life, I wouldnt use it at 1.5v surprised your computer didnt blow up. If you want to do 4.4Ghz you need a better cooler and you need to take more time to dial in a OC not just oh 4200Mhz and 1.25v, oh that didnt work lets try 1.5v

 

 

Use the guides the guy above me listed, they are very good I personally used them. I need to redo my OC though because it was unstable.

[Woofson]

wait... Vcore is core voltage? It is 1.149v(1.15), not 1.5V... sorry typing mistake... look at the screenshot

[Helios79]

The Haswell dye's don't seem to get over 4.4-4.5 GHz, regardless of how much voltage you put through them. My limit was 4.5 @ 1.25V. As for the cooling, I would definitely dump the Hyper 212 if you plan on doing any further overclocking. It's a great cooler for stock systems, but it cannot handle the heat of an overclocked processor. I upgraded to the H105 and now my 4670K @ 4.5 GHz doesn't go above 63C load.

[Faceman]

wait... Vcore is core voltage? It is 1.149v(1.15), not 1.5V... sorry typing mistake... look at the screenshot

Ahh ok, I see. 4.2 @ 1.15 is a good starting point. Start going up slowly. Also, leave your input voltage to what it came at when you first got it. No need to increase it until you start going to 1.3 and higher.

The Haswell dye's don't seem to get over 4.4-4.5 GHz, regardless of how much voltage you put through them. My limit was 4.5 @ 1.25V. As for the cooling, I would definitely dump the Hyper 212 if you plan on doing any further overclocking. It's a great cooler for stock systems, but it cannot handle the heat of an overclocked processor. I upgraded to the H105 and now my 4670K @ 4.5 GHz doesn't go above 63C load.

Wrong, my i5-4670k is at 4.7Ghz @ 1.275v and temperatures have never exceeded 81C during a 2 hour Prime95 run.

The Haswell dye's don't seem to get over 4.4-4.5 GHz, regardless of how much voltage you put through them. My limit was 4.5 @ 1.25V. As for the cooling, I would definitely dump the Hyper 212 if you plan on doing any further overclocking. It's a great cooler for stock systems, but it cannot handle the heat of an overclocked processor. I upgraded to the H105 and now my 4670K @ 4.5 GHz doesn't go above 63C load.

I'm sorry, I was brash with my first response. Haswell can and does go above 4.5Ghz, it is all dependent upon the chip you get. The 212 EVO is an incredibly cooler for the price, and is very capable of keeping processors cool, so long as voltages are not too outrageous.

[Helios79]

Wrong, my i5-4670k is at 4.7Ghz @ 1.275v and temperatures have never exceeded 81C during a 2 hour Prime95 run.

1. You won the dye lottery - congrats. Even Linus has stated that most Haswell's are a crapshoot for getting over 4.5 GHz.

2. 81C is far too toasty for me. If you want to suffer from electromigration, keep doing what you are doing.

[Faceman]

1. You won the dye lottery - congrats. Even Linus has stated that most Haswell's are a crapshoot for getting over 4.5 GHz.

2. 81C is far too toasty for me. If you want to suffer from electromigration, keep doing what you are doing.

1.  Thank you, I am incredibly lucky.

2. Thats an 81C during synthetic stress testing, temperatures aren't close to that during a full load such as gaming and cinebench.  I am looking into a better cooling option, but for the results I currently get, I am quite content.

 

     Haswell is a very dicey CPU, you don't know what you are going to get and the results are incredibly shaky.  Check out the statistics for the Overclockers.net OC Guide, you will see that most people are able to achieve 4.5Ghz+.  These people are typically competing for the highest possible results, so take it with a grain of salt, but 4.5Ghz+ is readily attainable if you are willing to pump extra voltage into your CPU.  Of course there are many unlucky people out there who no matter what they try, cannot get even average results, which is why I don't recommend people to buy expensive cooling solutions until they know what kind of chip they have.

[Woofson]

Wrong, my i5-4670k is at 4.7Ghz @ 1.275v and temperatures have never exceeded 81C during a 2 hour Prime95 run.

That is amazing. First guide it says stress test for minimum 8 hours. Do i really need to put that much stress on my CPU? There is no game that can stress CPU that much... IBT x20 times on high sounds reasonable to me, am i right?

It also says temps should Not Exceed 85c-90c maximum, so that one core with 87C during stress test is acceptable right?

I think there is no point going for higher clock since i have pretty high temperatures with this one...

Update:

I left my CPU on 4.2GHz @ 1.15v my system crashed so this time i downloaded prime95 set vcore to manual and did stress test for 30min. no crash, temperature was lower them with IBT, 83C iwth prime95, i set vcore to adaptive and started skyrim, system crashed again after couple of minutes... I tried to run games with manual vcore and no craches

In bios it says CPU voltage 1.008 which is default voltage not the one i set. It looks like when i set voltage to adaptive it reset cpu voltage to default. That is not what adaptive should do right? How to fix this?

[Faceman]

@Woofson

 

What motherboard do you have?

[Woofson]

@Woofson

 

What motherboard do you have?

Asus Z97-a

[Faceman]

Asus Z97-a

Ok, nice I have the Z87-A so it shouldn't be too different. When you set it to adaptive, you have to also set Additional Turbo Mode CPU Core Voltage to your desired voltage.

[deviant88]

Its called delid...

 

Also for safety keep it under 85C* MAXIMUM after at least 30 mins of benchmark prime 95 or IBT.

 

In gaming will stay in mid 70's C* probably which is very safe.

[Faceman]

You don't need to delid.  Delid is a last resort, and only if temperatures are what is holding you back.

[Woofson]

@Faceman
Yes, there is such option. Thank you very much. I read some post on tomshardware and guy says that is better to set offset voltage not to auto but the lowest possible, how is yours, is it on auto?

 

@deviant88

Delid? I don't want to rip off upper half of my brand new CPU... so as Faceman says it is last resort.
I run both, IBT for 10min the highest temperature was 87C, prime95 for 30min the highest temperature was 83C. While gaming it is much lower but i will monitor temperature for some time just to be sure.

[Faceman]

@Woofson

 

I have my offset voltage to auto.

 

LLC is another feature that you should read up on.

 

Load Line Calibration