i5 4690k - Running hot and uneven

[Ghostom]

Hi Guys,
Just started overclocking an i5 4690k, got it to 4.4GHz at a little over 1.2v which i thought was quite good but temps seemed far too high 95C+, seems high for small voltage?

Have clocked it down to 4.2 at ~1.18v but is still high 80s occasionally hitting 90, also the cores seem quite uneven - the highest is usually about 5c-8c different to the lowest. I have reseated and reapplied the thermal paste 3 times now with no change whatsoever (looked fine each time i took the cooler off).

I am using the Noctua NH-D9L, which is quite small but was hoping for slightly better results. Or was i expecting a bit much of a small cooler?

 

[Ghostom]

Thanks for the reply, I use prime95 for stress testing but have seen the 90c highs while gaming.

 

[Ghostom]

Thanks for the replies, for applying the paste, first time i added a small blob in the middle of the cpu as directed by the cooler instructions, when i reapplied i added a thin line vertically but this made no difference. When i removed it, both times it seemed to have good coverage but was not excessive (leaking out the edges).

I have got the cooler/fans orientated so it is blowing air out the top of the case.

I am overclocking in the bios on an ASUS board, I'm assuming the uncore is the same as cpu cache ratio? If so this is set as 3.9GHz would lowering this decrease the temps (ive got no issues with stability)?

Case is a Sharkoon CA-I, I am currently testing pretty much outside the case (sides and top off) and is about 10c lower - still high 70s at 4.2GHz @ 1.184v.

I will try adding another fan to the cooler and realbench for stress testing.

 

[Ghostom]

, ah well. I guess i was being a bit ambitious with that case, but thought i could get away with a small voltage increase and a decent cooler.

So would you say ~78c is about expected for that OC and cooler (in open air)?

 

[Ghostom]

Seems they vary a lot then? Was yours delidded Firejack?, very good temps.

 

[Ghostom]

Thanks for the help guys, I have had some success in bringing down the temps.

I have brought the uncore/cache clock down a couple of notches which allowed me to drop the volts a bit and also up the multi to 4.3Ghz.

Added a second fan to the cooler, and replaced both case fans with noctuas (probably did more to reduce noise than temps). I also changed the small (60mm) fan to exhaust air rather than intake (in an attempt to get rid of the heat off the GPU).

My new max (in the case) is now around 80c in Prime95 and the highest I've seen in any gaming session is 75. Quite happy with those temps.