Can't get past 4 ghz with my 4670k

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RombyDK

Honorable
Mar 21, 2012
16
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10,510
Hello. After reading a few guides online I wanted to try to OC my i5-4670k. I followed this guide

http://www.tomshardware.co.uk/forum/id-1722630/intel-god-quick-dirty-guide-4ghz-haswell.html

First I set everything to the minimum values mentioned. CPU cache x35, vcore 1.25, cache voltage 1.2 and input voltage 1.9 and then tried to boot with 4.2 ghz. Bsod after few seconds of prime95 blend test. Tried slowly increasing vcore but it keeps bsod'ing after a little Prime95. Got to Vcore 1.3v and didn't want to go higher. Temperatures didn't seem that high (around 70C as the cpu would bsod). But i just couldn't get it to run with 4.2 ghz. So set it to 4.1. No luck there either. After a bit trial and Error i got it running stable at 4.0 ghz with 1.275 vcore. I will try if i can get vcore even lower later today. After seeing 4.0 Ghz was stable with Vcore 1.3V i started decreasing Vcore, but it got to late so haven't tried below 1.275V. But everything just seem to be really bad compared to what others are achieving.

What am I doing wrong? Tried setting everything except multiplier and fixed vcore to auto. Tried setting cpu cache to 38, cache voltage 1.25 and cpu input voltage to 2.1. Nothing changes. Can't even get it to run prime 95 for a few minutes at anything higher than 4.0 ghz.

Asrock z87m extreme 4
I5-4670k
8 GB 1333 DDR3 (furyx i think)
CM Evo 212
 
Solution
bicycle_repair_man
Disable all the power-saving features, as well as Turbo Boost.

All you need to do is increase the VCORE. The override mode can be left at its default setting. Start at 1.25V and run a Prime95 Small FFTs test (not the blend test). If everything is still working after 10 minutes, then lower the VCORE slightly and run the same test again. Rinse and repeat until the PC starts to crash or one of the Prime95 threads fail.

Once you've found the lowest VCORE achieveable, run another Prime95 test for the same length of time that you'd normally use the PC. This will ensure absolutely stability.

Obviously keep an eye on the temperature throughout the entire process; 70C is a good maximum.
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bicycle_repair_man

bicycle_repair_man

Splendid
Jan 10, 2014
5,752
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28,960
All you need to do is adust the CPU multiplier and VCORE, everything else can be ignored. Reset your BIOS back to its default settings before you do anything else. You should also disable any power-saving features and these will dynamically adjust voltage and clock speed, which goes against the overclock. If you're concerned about power-saving then you shouldn't be overclocking.

Overclocking is, of course, a lottery, but I'd expect better results than what you're getting.
 
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R

RombyDK

Honorable
Mar 21, 2012
16
0
10,510
Hmm ok. Will reset Bios settings and try again with EIST and Turbo turned off.

Perhaps take off cooler and reapply termal paste (just to be sure). Will see if it changes anything.
 
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RombyDK

Honorable
Mar 21, 2012
16
0
10,510
Ok.

Can you confirm that i should disable both EIST and Turbo? Are there other powersaving features you know of?

Plan on setting core multipler to "all cores" and x40 -> x44
Vcore to Override mode 1.2 -> 1.3
Should i just leave the Vcore -/+ at auto or set it to 0. Vcore has been set to Override i dont know if this has an effect.
Turn of EIST and Turbo
Everything else mainboard standart settings.
 
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bicycle_repair_man

bicycle_repair_man

Splendid
Jan 10, 2014
5,752
2
28,960
Disable all the power-saving features, as well as Turbo Boost.

All you need to do is increase the VCORE. The override mode can be left at its default setting. Start at 1.25V and run a Prime95 Small FFTs test (not the blend test). If everything is still working after 10 minutes, then lower the VCORE slightly and run the same test again. Rinse and repeat until the PC starts to crash or one of the Prime95 threads fail.

Once you've found the lowest VCORE achieveable, run another Prime95 test for the same length of time that you'd normally use the PC. This will ensure absolutely stability.

Obviously keep an eye on the temperature throughout the entire process; 70C is a good maximum.
 
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Solution
R

RombyDK

Honorable
Mar 21, 2012
16
0
10,510
Ohh think i wrote the temperatures wrong in first post. 65-70C is the temperature just before bsod when i tested above 4ghz. With my stable oc of 4ghz and vcore at 1.275 the prime95 blend test gets to a max 88-91C and avg at around 60-70C
 
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R

RombyDK

Honorable
Mar 21, 2012
16
0
10,510
Ok. So i try both reset setting and termal paste reapply and hope for better temperatures. As i applied paste the first time i had no idea what i was doing. Think i might have spread it too thin. Will use the cross method next time.
 
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