CPU 95 degrees in minit with prime95

[Steensels]

Hello everyone,

I'm currently looking into my cpu temps, as they seem high to me. While doing so i discovered the temps fly from 50 to 65 degrees when the slightest load is put on it.

To sum it up

SYSTEM
Intel I7-2600 with stock cooler
Asrock Z77e-itx
OCZ extreme 650W
Samsung 850 evo 500GB
2x8GB DDR3 Kingston RAM
Cooler master elite 130
EDIT: Radeon HD6950

Temps
- Right after boot: 65 degrees
- Idling for a while: 45-50 degrees
- Light usage (browsing + video) 55-60 degrees
- Prime95 (V26.6 was recommended by someone for this cpu)
- The moment i press start, cpu temperature goes from 45 to 60 instantly
- Temperature keeps increasing after that by 1 per second +/- untill 89-90
- Temperature continues to increase untill i stop prime95 when it reaches 96 degrees

Temperatures measured (in separate runs) with speccy, realtemp, HWmonitor? and something else i found somewhere recommended. They all show +/- the same temperatures.

Prime95 V26.6 and latest have both been tried, same results. Both using the first option: Small FFTs

I have reseated the stock cooler with new thermal paste, although i'm not sure if it has been done correctly. Followed what most guides advised: pea sized drop in the middle and on with that cooler.

Now about that cooler, it doesn't just go on there, it requieres fiddling with 2 of the 4 pins to succesfully mount it.

Any chance it's not 100% guaranteed to be seated correctly even when the pins are through the motherboard?
Did order a new cooler, noctua NH-L9i, will arrive tomorrow.

EDIT2: When running prime95 under the same conditions as described above, in the same room with another computer, one that is in a confined space in that room, the temperatures of that device only go up very slowly compared to this one.
It's a lenovo prebuild machine running the following
I5-3470S
2X4GB DDR3
Some SFX(?) power supply that most websites consider not to be enough (180w)
Kingston SV300 SSD 500GB
No GPU

I think i got all the information written down, if i forgot something, feel free to ask.

Thanks in advance!
Glenn

 

[WildCard999]

Your issue is the stock cooler, that Noctua NH-L9i will be drastically better.

 

[t53186]

I'd suggest that the cooler is not properly seated, temps are on the high side and change too rapidly.

 

[dudmont]

Previous poster is correct, rapid temp changes with any load whatsoever indicates poor interface between chip and heatsink. Reseat and redo the TIM.

 

[Steensels]

Your issue is the stock cooler, that Noctua NH-L9i will be drastically better.

I want to believe that is the sole issue, i really do.
But it used to run great in another case with another motherboard.

So what changed
- CPU and cooler came preinstalled in the previous motherboard
- Smaller case (from cm 690 II to elite 130) although these temps are with an open case.

I might have the wrong expectations from prime95
So what dit i expect
- Temps maxing out at 70-75 degrees, as this is what I read on many different threads as recommendations for a healthy setup.

I trust and hope the cooler will be better, because it costs 10 times more. Have good experience with noctua's NH-U14S in my gaming rig.

PS: The pc in question runs with a radeon HD6950 which i'm going to edit in because i forgot.

 

[Steensels]

I'd suggest that the cooler is not properly seated, temps are on the high side and change too rapidly.

Thank you for your contribution, I will do it again, but I'm not sure what else i can do, the pins won't just slide in. It takes some fiddeling with them to get them in there.

Is it possible that one of the pins goes through the motherboard but the cooler still isn't seated correctly? Like in a faulty pin or something?

Might just wait untill tomorrow to try the noctua cooler.

What should i expect from prime95? Something as a general rule to know it's good or it's not.
eg: should the temps rise to 96 with a huge hint it's going up more?
eg2: should it be stable at some point?

 

[WildCard999]

While you may of installed the stock cooler incorrectly I know that if you keep taking it off and putting it back on can damage/loosen the pins slightly were it may not make the best contact on the CPU causing your higher temps.

 

[Steensels]

While you may of installed the stock cooler incorrectly I know that if you keep taking it off and putting it back on can damage/loosen the pins slightly were it may not make the best contact on the CPU causing your higher temps.

They feel loose, might be like that even new, i wouldn't know honestly.
Guess i'll have to wait for the new cooler to arrive.

In the meantime, i find lots of pictures about cooling paste after removal of the cooler.
Should the entire cpu be covered with paste when i remove the cooler tomorrow? Or just a circle like the back of the stock cooler?
Last time i removed the cooler, there was a circle on the cpu. Meaning corners weren't covered.

 

[WildCard999]

The Noctua will arrive with paste already on it, use that.

 

[Steensels]

The Noctua will arrive with paste already on it, use that.

That could be usefull, although i wasn't expecting that because the NH-U14S came without it.

Is there a difference between the pre-applied paste and a DIY job asside from having the correct amount preapplied?

 

[WildCard999]

Well if it doesn't come with it the method I use is putting about a grain of rice sized amount on the CPU then use a store card/gift card to spread it evenly over the CPU as thinly as possible while covering the entirety of it then mount the CPU, been using this method for quite a long time with good results.

I doubt there would be much of a difference as long as the same amount it used.

 

[dudmont]

One of the things about those pushpin coolers, they don't always play nice. And if it's not seated perfectly, you don't get enough pressure on the chip to get the TIM spread nicely and it doesn't contact enough to soak up the heat from the chip(this is almost certainly what you have going on). The Noctua will come with a nice foldout that gives you step by step instructions on the installation. Return to this thread, if you don't have success in cooling that CPU down, when you get the new cooler installed.
BTW, your lentil/rice method of applying TIM is correct, so long as you have enough pressure from the heatsink, it will spread nicely and perfectly fine, by itself.

 

[Steensels]

Well if it doesn't come with it the method I use is putting about a grain of rice sized amount on the CPU then use a store card/gift card to spread it evenly over the CPU as thinly as possible while covering the entirety of it then mount the CPU, been using this method for quite a long time with good results.

I doubt there would be much of a difference as long as the same amount it used.

Thanks for your time and ideas.
The noctua cooler arrived, and temps are around 40, just tried prime95 and temps went up slowly, being somewhat stable around 75 degrees.

Did put a drop in the middle without spreading, as a test if it really was the stock cooler not making a decent connection.

Thanks again.

Best regards
Glenn

 

[WildCard999]

So yea those temps are much better, being under 80C will keep that CPU from thermal throttling and while Prime95 is good for testing it's stress testing is a bit more then you'll find in normal usage such as gaming and even basic video rendering. I wouldn't be surprised if it stayed under 70C during normal usage.