Why is my i5-4670k so hot at only 4ghz?

[KaaN10]

First build and overclock, I've just been changing the cpu ratio and voltage via the Z87 bios. I also changed the RAM to 1600 before starting if that makes a difference.

The i5-4670k is 4ghz @ 1.125 voltages (lowest it will go before BSOD). The temps I'm getting are 75 degrees max on prime95 after a 30 minute blend test. The cooler is a hyper 212 evo with a noctua f12 fan.

Any ideas why it's running so hot for only 4ghz and 1.125v?

 

[Vesku]

Check the heatsink seating is firm. If so, then remove the heatsink and observe the Thermal Interface Material to check if it is thinly and well distributed across the main portion of the CPU heatspreader.

 

[blackened23]

You don't need to do ANY of the above. 75C is not hot for that CPU. It is well within tolerance. If you get 75C in prime you won't pass 55C in real world use.

 

[Vesku]

Actually, it does seem to be similar to this persons results . allenk09 is hitting ~80C IntelBurnTest at 4.2GHz with Hyper 212 Evo in push pull. Haswell runs hot, indeed.

 

[KaaN10]

Good to know it's normal, thanks.

What kind of temps should I be stopping at? 80C? 85C?

 

[blackened23]

Good to know it's normal, thanks.

What kind of temps should I be stopping at? 80C? 85C?

85C in prime is 65C in real world use. I wouldn't go too far unless you opt for a versatile closed loop cooler such as an h100i - so I wouldn't push to 4.6ghz or anything like that, but you can try upping the voltage and clockspeed slightly. 4.1 perhaps, I don't know. Anyway, you are well within tolerance even at 85C and under - throttling begins at 95C and the limit is 105C IIRC. My own IVB gets up to around 88C in prime95 blend testing. You are fine at 75C so long as your system is stable, don't worry about it.

 

[24601]

Since ehume only managed 4.3ghz in Intel Math Library Linpack with a NH-D14 without thermal throttling, I wouldn't put your hopes very high unless you want to delid your processor.

 

[KaaN10]

85C in prime is 65C in real world use. I wouldn't go too far unless you opt for a versatile closed loop cooler such as an h100i - so I wouldn't push to 4.6ghz or anything like that, but you can try upping the voltage and clockspeed slightly. 4.1 perhaps, I don't know. Anyway, you are well within tolerance even at 85C and under - throttling begins at 95C and the limit is 105C IIRC. My own IVB gets up to around 88C in prime95 blend testing. You are fine at 75C so long as your system is stable, don't worry about it.

Thanks.

I could probably get 4.2 at 85C but I would rather 4.1 with all the fans set to silent.

 

[DigitalWolf]

As others have stated this is pretty normal for Haswell temp wise (with a stress test running).


If you were to run that same program at default (out of the box) settings I bet your temps would be even higher... simply because the (auto) settings would jack your vcore up higher than you currently have it set.


So from a certain point of view you are actually running cooler... *.*


*edit* I should add that I am assuming from what I read you are using a fixed/override vcore setting. If you are using adaptive then my above humor wouldn't be accurate as it will jack the vcore in those tests.

 

[KaaN10]

*edit* I should add that I am assuming from what I read you are using a fixed/override vcore setting. If you are using adaptive then my above humor wouldn't be accurate as it will jack the vcore in those tests.

Yep it's on fixed setting.

I'm supposed to change it to adaptive when I'm done overclocking right?

 

[cytg111]

Hence for potential buyers, get the non K version at this time(and get the xtra features) or wait and see if a future stepping fares better


edit:
http://www.legitreviews.com/article/2203/14/

at 4.5GHz

"For example we fired up Prime95 and within a few seconds we were hitting 100C and the CPU throttled back to prevent certain CPU death. We lowered the overclock to 4.3GHz and it still throttled, so we went down to 4.2GHz. "

"At 4.2GHz we saw the temperatures hit 90C, but then the fan kicked on and dropped it down into the 80's for the duration of the run."

It is just not worth it to get the K version at this time.

 

[blackened23]

Just so you know, legitreviews used a STOCK cooler in that review. Gee, it gets hot when over-volted? I haven't used a stock cooler on any CPU, ever. And I don't know of ONE SINGLE overclocker that uses it.

You omitted this part as well from the same review:

It should be noted that we are able to hit 4.7-4.8GHz with the Corsair H100i water cooler and there is no throttling, so plan ahead if you want to overclock!

 

[Concillian]

My 4670k was hitting mid 80s during Intel Burn Test at 4.25GHz with a Noctua at full voltage. I haven't checked the AVX2 version, I bet that would put it to near throttling.

I'm not sure what the value of that is, though. AVX isn't really used by anything else.

 

[MrPickins]

First build and overclock, I've just been changing the cpu ratio and voltage via the Z87 bios. I also changed the RAM to 1600 before starting if that makes a difference.

The i5-4670k is 4ghz @ 1.125 voltages (lowest it will go before BSOD). The temps I'm getting are 75 degrees max on prime95 after a 30 minute blend test. The cooler is a hyper 212 evo with a noctua f12 fan.

Any ideas why it's running so hot for only 4ghz and 1.125v?

I'm running a 4670K at 4.2 & 1.18V (may be able to go lower on voltage, still working that out) with an EVO in an Antec Three Hundred case.

Prime 95 temps max around 85C on the hottest core with ambient around 80F (27C).

Your results sound about right.

 

[KaaN10]

Just upped the multiplier to 4.1ghz and 1.155v and I'm getting the same temps as 4.0ghz 1.125v ... weird.

 

[JimmiG]

Temps don't start to *really* climb until you go beyond 1.20V.

My 4770K hits about 85C in the Small FFT AVX test at 4.3 GHz/1.214V. Without HT, it drops by about 8-10C. I'm using the Phanteks PH-TC14PE.

 

[KaaN10]

Final overclock:

4.2ghz
1.185v
80C prime95
All fans on silent

Pretty happy with that.

 

[Rvenger]

Looks to be an average temp and voltage. I run mine at 4.2ghz at 1.15v and max out at around 73-75c. That is a 4770k with HT enabled.

 

[cytg111]

Just so you know, legitreviews used a STOCK cooler in that review. Gee, it gets hot when over-volted? I haven't used a stock cooler on any CPU, ever. And I don't know of ONE SINGLE overclocker that uses it.

You omitted this part as well from the same review:

Didnt omit, didnt read that far .. But yes, I suppose it depends on what sort of overclocker you are, do you feel comfy with a water rig, then you can go higher.
I suppose there is value in that story, haswell, it seems is temperature limited, like, alot. It could give delidding a "comeback"? I mean iveys were delidded yielding 10-20 degree temp drops and yet only another 100-200mhz headroom.. This story seems to suggest delidding haswell could seriously improve your overclocking milage...

 

[blackened23]

Are you kidding me? STOCK COOLER? And you're sitting here talking about delidding?

I suppose there is value in that story

No there isn't. Perhaps you don't realize how utterly silly it is to attempt over-volting and overclocking with a STOCK cooler. Stock cooler gets too hot at 1.25V. We have a story here folks.

 

[cytg111]

Allright, lets do this.. then..(!)

“Never argue with idiots. They drag you down to their level and then beat you with experience.”- Dilbert
.. So I dont expect to win this. Butt Anyway.

"STOCK COOLER?" as by you defined must be able to handle some pretty different levels of ambient temps, thus it stands to reason that there would be some headroom available even on the stock, if you're not living in the hottest parts of planet earth.

SECONDLY?.. I cannot deduce what part of the logic behind "I suppose there is value in that story" that fails your mind, you need to be more specific. If you can of course.


... AAand all of the above is written in a mildly friendly sarcastic tounge-in-cheek kind of way. Humor is all it is. Got nothing for love for you bro ;-).

 

[blackened23]

I have some words for you here, but seeing as you apparently have an agenda with misrepresenting facts with a stock cooler test, i'll keep it to myself. Obviously i'm the idiot here. (i'm completely oblivious to the passive-aggressive tone in your post as well).

 

[cytg111]

Arh common, dont get emotionally involved pal .. I have no agenda whatsoever, if my logic is flawed then I'd like that pointed out in a civil manner, expanding my mind is the next best thing I know (sex comes first). Back to the facts, if dropping temps really do increase overclocking headroom on haswell that much(where as it did not as much ivey), I do not see the non-information here? I have no problem confessing a wrongful statement at all, but everything I've read in reviews about retail haswells(not the ES's first reviewed) and ppl's experiences in forums and this thread paints pretty clear picture for me. Only thing I'm deducing from the context of this thread is that haswell might not be OC limited in the same way Ivey was/is.

 

[Idontcare]

"For example we fired up Prime95 and within a few seconds we were hitting 100C and the CPU throttled back to prevent certain CPU death. We lowered the overclock to 4.3GHz and it still throttled, so we went down to 4.2GHz. "

"At 4.2GHz we saw the temperatures hit 90C, but then the fan kicked on and dropped it down into the 80's for the duration of the run."

It is just not worth it to get the K version at this time.

Just so you know, legitreviews used a STOCK cooler in that review. Gee, it gets hot when over-volted? I haven't used a stock cooler on any CPU, ever. And I don't know of ONE SINGLE overclocker that uses it.

My ivy 3770k would hit 101C at 4.2GHz with the stock HSF.

This should surprise no one to find the same HSF-limited OC'ing is observed with haswell 4770k.

 

[Sazuzaki]

intel chips generally runs hotter, I think its just in the right range.