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CPU temp 40°C in idle?
09-18-2013, 01:20 PM,
#1
CPU temp 40°C in idle?
My first time myself-builded PC is almost done, I'm only waiting for the optic drive in order to install windows 7.

However, while setting the SSD, I saw in the BIOS that CPU temp is 37-40 C° with the CPU fan in "full on" mode and I thought that's kinda strange with a CM hyper 212 evo mounted, isn't it? (The temperature in the room is 27-28 C°)

[Image: IMG_2300.jpg]

So I thought about some things that perhaps could be the cause of this:

1) I have failed with the thermal paste, indeed it was the first time, but I have read a lot in Internet, and I'm pretty sure that the quantity was the right one (I used the rice/pear method)
2) I have failed mounting the after market cooler;
while mounting I don't think that I have followed quite well the rule to screw a bit in every position, following the diagonal order.

My system specs are:

I5 3470, AsRock B75M R2.0, 8 GB corsair vengeance ram, msi gtx 660 oc tf III, and the case is a carbide 300R with 4 fans (1 rear, 2 front, 1 top, as you can see from the picture)

[Image: IMG_2299.jpg]

So what should I do? Remounting the CPU cooler, again and again, till I get lower temp? If so, can I do it leaving the motherboard mounted?

Thanks in advance
Have an happy day
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09-18-2013, 02:45 PM, (This post was last modified: 09-18-2013, 04:07 PM by MathieuB.)
#2
RE: CPU temp 40°C in idle?
Edited: 37-40C at idle is nothing to worry about, load temperatures are what matters.

That said, you can easily improve the temperatures by turning your CPU Cooler 90 degrees counter clockwise, so that the CPU Cooler fan push air through it and then the hot air exists via the fan on the back of the case.

Right now, the CPU Cooler fan doesn't have much space to pull air from and when you'll be playing video games, it will be pulling hot air coming from the video card, which is far from ideal.
Laptop: MSI GS30 Shadow-045 Dimensions: 12.6" x 8.9" x 0.8" 2.65lbs CPU: Intel Core i7-4870HQ Quad-Core + Hyper-Threading OC 2.5-3.9GHz RAM: 16GB DDR3 1600MHz Video Card: Intel Iris Pro 5200 Storage: 2x128GB SDD RAID0 Audio: ASUS Xonar U3 USB Sound Card + Audio-Technica ATH-M50 headphones Screen: 13.3" - 1920 x 1080 IPS + 27" Dell P2715Q IPS 3840 x 2160 Keyboard: Filco Majestouch MX Cherry Blue Mouse: Logitech MX518
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09-18-2013, 04:04 PM, (This post was last modified: 09-18-2013, 04:09 PM by PwnBroker.)
#3
RE: CPU temp 40°C in idle?
he said his room temp is 27-28 deg, thats about 10 deg over ambient at idle which sounds about right plus your gpu fans are stealing air from your cooler.

do like mat said and turn the 212 around itll cool much better.
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09-19-2013, 12:42 AM,
#4
RE: CPU temp 40°C in idle?
Thanks for your replies,

do you think I must clean the thermal paste from both sides and reapply it or is it possible to just rotate the cpu cooler and refit the screws?
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09-20-2013, 04:11 AM,
#5
RE: CPU temp 40°C in idle?
(09-19-2013, 12:42 AM)Notreally Wrote: Thanks for your replies,

do you think I must clean the thermal paste from both sides and reapply it or is it possible to just rotate the cpu cooler and refit the screws?

Nevermind, i reapplied thermal paste and rotate the cpu cooler, temps are a bit lower (stable at 37 but sometimes goes to 36 or 38; room temps are 25-26 however)

[Image: IMG_2306.jpg]

So I shouldn't worry about it? Better wait to do a cpu stress test and see the results right?

I'm a bit paranoid 'cause mounting that cpu cooler is a pain in the ass, and while mounting I usually move it a lot, for example, here are the pictures of the thermal paste after I removed the CPU cooler in order to rotate it (paste dropped a bit outside the CPU plate)

[Image: IMG_2305.jpg]

[Image: IMG_2303.jpg]
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09-20-2013, 08:45 AM,
#6
RE: CPU temp 40°C in idle?
yeah looks like you got it a bit off lol. the chip is right in the center of that heat spreader so it might have got a little hotter. the idle temp looks fine for your ambient temp, stress test it and see what you get.
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09-21-2013, 12:39 AM,
#7
CPU temp 40°C in idle?
Yes, everything said here.

If you are looking for software to stress test the CPU, recommend Prime95.
Run the stress test algorithm, and let it go for at least 1 hour.
CPU: Intel i7-2600K @4.2GHz Mobo: ASRock P67 EXTREME4 GEN3 RAM: Corsair Vengence 8GB 1600Mhz DDR3 GPU: Sapphire Radeon HD 7970 3GB
SSD: Samsung 830 Series 256GB SATA 6.0Gb/s HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 80 PLUS Modular ODD: SONY DVD 24x
CPU Cooler: Thermalright SilverArrow Sound: Creative SB X-Fi Titanium Fatal1ty PCI-E Case: CM Storm Trooper
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09-26-2013, 12:21 PM,
#8
RE: CPU temp 40°C in idle?
I did the CPU stress test, but I didn' t find results file, anyway I did a screenshot of prime95 after 1 hour of test:

[Image: results2.jpg]

and here the temperatures, a couple of seconds before shutting it down:

[Image: results.jpg]

Moreover I stressed the GPU too:

[Image: GPU.jpg]

So I think everything is just fine, or am I wrong?
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09-26-2013, 12:22 PM,
#9
RE: CPU temp 40°C in idle?
Perfectly safe temperatures for both the CPU and video card.
Laptop: MSI GS30 Shadow-045 Dimensions: 12.6" x 8.9" x 0.8" 2.65lbs CPU: Intel Core i7-4870HQ Quad-Core + Hyper-Threading OC 2.5-3.9GHz RAM: 16GB DDR3 1600MHz Video Card: Intel Iris Pro 5200 Storage: 2x128GB SDD RAID0 Audio: ASUS Xonar U3 USB Sound Card + Audio-Technica ATH-M50 headphones Screen: 13.3" - 1920 x 1080 IPS + 27" Dell P2715Q IPS 3840 x 2160 Keyboard: Filco Majestouch MX Cherry Blue Mouse: Logitech MX518
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09-27-2013, 05:35 AM,
#10
RE: CPU temp 40°C in idle?
(09-26-2013, 12:22 PM)MathieuB Wrote: Perfectly safe temperatures for both the CPU and video card.

Glad to hear that Mathieu, finally my first builded PC is ready to go!

By the way, this site was an indispensable help, thanks you all and keep it up guys! Smile
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