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Constant 38C CPU Display

johnnyboy

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I have an Intel Core 2 Duo E8600 CPU and I tried running the tests but my temperature remains at 38C. I just recently installed a new Cool Master Hyper 212+. I don't know if the new cpu cooler has anything to do with my problem, but the program was running fine with temperatures fluctuating when I had my previous stock CPU fan on the CPU. Can anyone help me with my problem?
 
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Sounds like a stuck temperature sensor to me.

If you want temperature monitoring, you can always get a fan controller/temp monitor and use a temperature probe.

If you're not overclocking, I wouldn't worry about it. Just make sure you remove the cooler to ensure proper TIM spread, and you'll be good to go.

Which tests were you running by the way? I would recommend Intel Burn Test.
 

PVTCaboose1337

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In order to measure temperature, from what I understand, the computer uses a thermistor. This is a resistor that will change resistance with temperature. What happens when it breaks is the resistance will be constant, meaning temps will never change. In the earlier chips you could see it exposed by the core. However, with the advent of IHS's, I could foresee it getting crushed if the cooler gets pushed on it somehow.
 

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All the information on Intel's thermal issues/controls can be found repeated over and over in this section.


They aren't made to be accurate at lower temperatures, as it draws closer to 100*C they get more and more accurate to real temperatures.
 
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johnnyboy

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I am not overclocking at the moment. My test consisted of running many large apps at once, but I tried using the Intel Burn Test and my temperature reading actually went as high as 48C. I did screw the CPU fan on tightly since it was quite large, but since there was actual fluctuation I guess nothing was crushed.

My conclusion: my new CPU fan is extremely efficient at cooling.

Thanks for all your insights, I learned a lot, really appreciate the help!
 

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All the information on Intel's thermal issues/controls can be found repeated over and over in this section.


They aren't made to be accurate at lower temperatures, as it draws closer to 100*C they get more and more accurate to real temperatures.

Exactly, it won't read lower temps, and will actually get stuck at lower temps, but as the temperature actually gets higher it will go up.

People need to stop worrying about temperatures below 40°C when the sensor works when it is above 40°C.
 

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Just to confirm your suspicions, when I have my E8400 at it's stock clocks, I can't get the temp to read over 36C even when running prime95.

When/if you overclock, I'm willing to bet that you will see it rise. At over 4ghz, I can reach

about 52C with 1.344 vcore (cpuz reading) after an hour or more of prime95. Intel Burn Test will make it go above 60C.
 
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johnnyboy

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At over 4ghz, I can reach

about 52C with 1.344 vcore (cpuz reading) after an hour or more of pime95. Intel Burn Test will make it go above 60C.

I am considering overclocking, my CPU is currently clocked at 3.16GHZ @ 38C. What is a safe amount to overclock to without worrying about temperature issues?
 

Brilford Wimley

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E8600s can almost always be reliably overclocked to at least 4ghz. That depends entirely on your hardware though. You should post all of your specs.

From what I've heard, you don't want to go over a 1.4 vcore and try to keep the temp under 70C.
 
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I used to run HIGHLY clocked Wolfdales on air and on water. Here were my guidelines:

Air: 1.4V under 55C
Water: 1.5V under 65C

That's what I used, and I never killed a chip. Ran most of them at 4.5GHz.
 

johnnyboy

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E8600s can almost always be reliably overclocked to at least 4ghz. That depends entirely on your hardware though. You should post all of your specs.

These following items are inside my computer

COOLER MASTER Hyper 212 Plus CPU fan
GIGABYTE GA-EP45-UD3P LGA 775 Intel P45 ATX Intel Motherboard
Mushkin Enhanced 550250 580W ATX12V / EPS12V SLI Certified CrossFire Ready Modular Active PFC Power Supply
Intel Core 2 Duo E8500 Wolfdale 3.16GHz LGA 775 65W Dual-Core Processor BX80570E8500
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK
Western Digital VelociRaptor WD1500HLFS 150GB 10000 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

What would be a safe amount to overclock?
 

Brilford Wimley

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Good mobo, good ram, I'd say 4ghz+. Every chip is different, though.
 
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I am considering overclocking, my CPU is currently clocked at 3.16GHZ @ 38C. What is a safe amount to overclock to without worrying about temperature issues?

actually theres no best start on overclocking, i usually start from 10 percent from the stock clock, if its fine you can go higher.
And you cant mark it like the other although its the same rig, just trying
 

Brilford Wimley

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My rig is very similar to yours (ud3p and E8400 with 4gb RAM) and these are some general guidelines when I overclock :

In BIOS,

1. CPU Host Clock Control [Enabled]
2. CPU Host Frequency : set to 400 for 3.6ghz, 440 for 4ghz (If you have a 9x multi)
3. PCI Express Frequency [100 mhz] This is important for stability.
4. Performance Enhance [Standard]
5. System Memory Multiplier : I set it at 2.00B. This is what works in my rig. Yours could be different.
6. DRAM Timing Selectable [Auto] You may have to loosen timings if it's not stable [Manual]. Mine is stable at 5-5-5-15, but I have DDR2 800 instead of your 1066.
7. CPU VCore : [Auto] You will probably have to set it to [Manual] and increase voltage if you are going past 4ghz. Sometimes, it requires an increase even for a slight overclock.

Hope this helps!
 
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