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4670K Ramping up to 100 C instantly

post #1 of 8
Thread Starter 
I just put together my new PC with an i5 4670k. it runs at about 39 C on idle but as soon as a start a test like prime 95 or intel burn test, it ramps up to 100 C within 4 seconds. The software I am using is HW Monitor and Real Temp. I think this may be a software issue and not a hardware issue. I opened my case and stuck my had right over the heatsink where the air flows from the cpu while it was at 100 C and it felt very cool and normal. Considering 100C is a boiling point I think I should have felt hot air. What do you guys think??? here is my build below.

Build
CPU i5 4670K at stock settings
Mobo Asrock z87e itx wifi
Case Hadron Air
CPU cooler EVGA itx cpu cooler for hadron air
RAM 8 gb Corsair Veng LP
1 TB WD Black drive
MSI r9 270 GPU (idle at 29 C)
post #2 of 8
The heat you feel with you hand actually has nothing to do with how hot the processor is... just how much power it's consuming.

39C is pretty high for idle, I'd say you have not enough/too much TIM or some other thermal interface problem.
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Bruce
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post #3 of 8
Quote:
Originally Posted by MartinLongbow View Post

I just put together my new PC with an i5 4670k. it runs at about 39 C on idle but as soon as a start a test like prime 95 or intel burn test, it ramps up to 100 C within 4 seconds. The software I am using is HW Monitor and Real Temp. I think this may be a software issue and not a hardware issue. I opened my case and stuck my had right over the heatsink where the air flows from the cpu while it was at 100 C and it felt very cool and normal. Considering 100C is a boiling point I think I should have felt hot air. What do you guys think??? here is my build below.

Build
CPU i5 4670K at stock settings
Mobo Asrock z87e itx wifi
Case Hadron Air
CPU cooler EVGA itx cpu cooler for hadron air
RAM 8 gb Corsair Veng LP
1 TB WD Black drive
MSI r9 270 GPU (idle at 29 C)

I use the same software for monitoring temps and such. Real Temp and HWinfo has never let me down. To me it may be your CPU cooler not fully seated properly and/or poor application of thermal paste.
 
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Blowitoutourass 2
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by brucethemoose View Post

The heat you feel with you hand actually has nothing to do with how hot the processor is... just how much power it's consuming.

39C is pretty high for idle, I'd say you have not enough/too much TIM or some other thermal interface problem.

I initially had really high idle temps of around 50C. So I oriented the cooler differently and they lowered, also the amount of TM I saw when I took off the cooler seemed to be right. Although it didn't go all the way out to the edges of the cpu, should it? would something like that cause it to spike that quickly?
post #5 of 8
Quote:
Originally Posted by MartinLongbow View Post

I opened my case and stuck my had right over the heatsink where the air flows from the cpu while it was at 100 C and it felt very cool and normal.

This suggests heat is not transferring efficiently between the actual CPU and the heatsink (e.g. poor mounting, poor TIM application).
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post #6 of 8
Thread Starter 
Thanks everyone, well tonight I will remove the motherboard and try to reseat it. Previously when I reseated it I did it while the mobo was in the case, it was very tight for me to install so maybe it did not get a good contact.
post #7 of 8
Thread Starter 
Hey guys, so I reseated the cpu and it seemed to help! My idle temp went down to about 29c and the load temp was 70c. The load temp still seems a little high for it not being overclocked or anything. What do you guys think? And the fan speed for the cooler is at 85 percent
post #8 of 8
A CPU is quite small, so it doesn't really put out so much heat.
It can run at 100c while not putting off the heat of an oven at the same temperature.

The fact that it jumped up instantly was a sure sign the heatsink wasn't on properly, and since remounting it dropped the temps it's proof.

I believe 70c is about normal for it under a full load using the stock cooler. Since you have a non-stock cooler you might want to try remounting it again or just let it run for a while for the thermal paste to settle.
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