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What's causing my high CPU temp cuz I'm stumped :P

Tags:
  • Overheat
  • Thermal Compound
  • CPUs
  • BIOS
  • Fan Speed
Last response: in CPUs
July 15, 2014 3:07:26 PM

Hi all, first off just want to apologize if I've posted this in the wrong place or whatever due to my newly held noob status ;)  .

My specs are:

CPU: i5 4440
Mobo: Asrock Z87 pro 3
GPU: XFX R9 280X
PSU: Corsair CX600 (600watt)
Ram: Corsair Vengeance 8GB
SSD: Crusial M500 (240GB)
Case: Zalman Z9 plus

After finishing my first PC build I happily entered BIOS expecting a few bits and pieces but mainly a cake walk. However, I was horrified by my CPU temp in H/W monitor, which climbed and climbed before balancing out at about 53 C whilst idle with fans at full speed (1917-58 rpm)! My mobo peaked at 28 C and my case was 26 C (according to case thermometer) with an ambient temp of 23 C.

After doing a bit of research I decided to buy the necessary product and replace the pre-applied thermal paste, using Arctic silver Arctic clean and mx-2 thermal paste. My first effort using the pea method was less than perfect but I figured whatever. With fans set at full speed I achieved 43 C. A massive achievement but still too hot.

I had another crack, this time taking extra care, cleaning thoroughly before applying the paste. I achieved an idle temp of 40 C at full fan speed and 42.5 at performance speed (1500 rpm about). Much better but still too hot. I took my stock fan off again to see the thermal paste spread (I know this can cause air bubbles). It seemed damn near perfect. The center was covered along with the cores but the paste layer was still fairly thin.

So my conclusion... I can't personally apply the paste any better so I don't think this is the issue but I could be wrong. My cable management isn't great ( I really struggled with it) but surely if the case is 26 C then case airflow can't be the issue right (this seems confirmed by an unchanged temp when I took the side off)? I've read that BIOS isn't always accurate at low temps but equally I've read the opposite so i don't know. Either way I'm scared that if I install windows then I could cause damage to my CPU.

Thanks in advance guys, I hope I've included enough details.

P.S. Just purchased a 212 EVO off amazon but I still want to resolve this issue.

More about : causing high cpu temp cuz stumped

July 15, 2014 3:11:50 PM

Are you only reading the temperatures in BIOs? If so, try using software such as HWMonitor when in Windows and the temperatures should be lower. When you are in BIOs the CPU does not use power saving features so it runs at the base clock and max set voltage. All of the CPUs I had in the past had temperatures of about 40C-50C in BIOs :) 
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Anonymous
a b à CPUs
July 15, 2014 3:12:55 PM

How much of thermal paste did you apply? All you need a single dot of thermal paste and nothing more; it doesn't matter if it looks thin.
In my opinion, 40C is good to go. You should be worried if the temperature goes too high when you are gaming or rendering.
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a b à CPUs
July 15, 2014 3:14:35 PM

AMD chips work bests when you spread the TIM evenly and very thin over the entire die of the CPU because their heat spreader is a whole lot wider than the Intel spreader so you dont necessarily need to spread it so much. The pea or the stripe method should work fine.

As for your temps, Im an AMD overclocker and have very little experience with Intel chips but isnt temps in the 40's about par for the course especially with a stock heat sink only spinning at 1900 RPM? I know temps get into the 70's and even 80's for Intel overclockers when theyre stress testing.

Id slap that Hyper on there and see what it does for you and check out some Intel overclocking reviews and see what kind of temps theyre getting cause I dont think youre that far off from the norm.
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July 15, 2014 4:11:01 PM

Thanks for the quick replies guys :)  , really appreciate all your answers. I would be happy to install windows at 40 normally, the issue is 40 is the temp when the fans are manually maxed out. So i feel at little worried installing windows. Sadly that puts something like prime95 out of the picture for now :p .

CompuTronix, your guide was one of the first things I read funnily enough and was probably my first indication that BIOS may not be accurate. I've reread it whilst skipping over the overclocking parts and testing using software in windows (neither being applicable to me for now). I can't seem to find my answer unless my BIOS is just... well wrong.
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Best solution

a c 306 à CPUs
July 15, 2014 4:47:46 PM

Keep in mind that BIOS is running the CPU on a boot voltage that's transparent, and isn't shown as Vcore, so CPU temperature will always be higher in BIOS than it is in Windows.

Don't get stuck on CPU temperature in BIOS, and don't worry about your fans for the moment. 40C is only 104F, so most of us have probably had a fever that high!

Just ignore it and go ahead with installing Windows, then run Core Temp or Real Temp to see where you are. You'll be fine.

CT :sol: 
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July 15, 2014 4:53:42 PM

CompuTronix said:
Don't get stuck on CPU temperature in BIOS, and don't worry about your fans for the moment. 40C is hardly even warm. Just ignore it and go ahead with installing Windows, then run Core Temp or Real Temp to see where you are. You'll be fine.

CT :sol: 


Thanks CT, I'll install windows tomorrow morning and report back :D  .
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a c 306 à CPUs
July 15, 2014 5:06:11 PM

I'll be here for you. :sol: 
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July 16, 2014 7:07:51 AM

After monitoring temp, I was greeted with 31 C at Idle and at full load a max of 70 C. Naturally I'm pretty happy. Thx CT and everyone else who contributed. As a newbie to this forum I'm really happy with the friendliness, helpfulness and speed of people who are eager to help. Thx again, defo using and contributing in the future :D  .
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a c 306 à CPUs
July 16, 2014 10:27:12 AM

Congrats! Beers all around! :sol: 
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