More experienced mind required.

vondanzig · 30 Nov 2016 at 00:13

Hey all.

Recently been overclocking my i5 4670k on my Gigabyte Sniper Z97 with some interesting results.

So right now I am sat at 4.2Ghz with a Vcore of 1.2014 which I am quite happy with. When it comes to testing though, I achieve consistent results. Consistent insomuch that no matter how I tweak my Vcore, P95 shows a peak of 75C. The tweaking however becomes noticeable when gaming for example where the temps barely even graze 60C. It seems that 100% Load in P95 and 100% Load in normal activities are days apart.

I would like to go for more but the P95 numbers really tell me I shouldn't. Does anyone have any advice to offer?

tres_kun · 30 Nov 2016 at 06:27

Question is what cooler are you using and thermal paste
As that temp is rather high for 1.2V

vondanzig · 30 Nov 2016 at 11:35

The cooler is an Akasa Venom in addition to Arctic Silver 5 TP. Have re-applied the TP as well which has knocked off say 2C when using Prime95. I also have optimal(ish) airflow I believe.

Danny75 · 30 Nov 2016 at 16:32

Use Cinebench and Asus Realbench and max temps with those of 70-75C is fine for regular use. Only stuff like Prime will generate 15-20C more than that.

You're only getting 75C with Prime because the Vcore will shoot up to 1.3v during the test, instead of remaining around 1.2v.

Given the temps you are getting, something around 1.25v will likely be fine for regular use (i.e. max temps of 70-75C). The question will be whether 0.05v extra will get you a stable 4.3GHz (or more), or whether it will need more voltage than that, making it not worth it.

John7up · 30 Nov 2016 at 16:49

Can.t you try to achieve 4.4, 4.5 for 1.25v? It sounds better for that cpu. And temp wose as long as you don.t exceed 80..You are quite well in the safe zone.

mmj_uk · 30 Nov 2016 at 17:59

Processors today can only really handle Prime95 at stock settings, once you increase the clock speed and especially voltage heat dissipation becomes a problem, extra cooling won't necessarily help because most of the heat is trapped on the die. Devil's Canyon based i7 will struggle with Prime95 even at stock because it's overclocked/volted out of the box.

Your best bet is to just use something like Asus Realtemp and if Prime95 stability is a requirement either run at stock settings or just try to overclock as much as possible without increasing the voltage at all.