CPU Temperature Never Lower Than 34 Degrees

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dezzo
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CPU Temperature Never Lower Than 34 Degrees

Post by dezzo »

One of my desktops has an Intel Core 2 Duo E7500 CPU, and the lowest temperature reading I've seen for the CPU is 34 degrees C.

Even if the window is open and the cold winter air makes the room very cold, the CPU temperature never falls below 34 degrees. The CPU temp will rise with CPU activity, but always settles back at 34.
This seems very unusual to me, and my other computers will correctly register lower temperatures if the ambient temperature drops. I've seen my i7 system go as low as 16 degrees C when the room got very cold.

What could be causing this? Does the Intel E7500 CPU not allow for readings below 34 degrees, or could it be something else?

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The Coolest
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Re: CPU Temperature Never Lower Than 34 Degrees

Post by The Coolest »

The sensors in Intel's chips have an issue usually referred to as "sticky sensors", this is a problem where the sensor will not register a temperature.
In 45nm CPUs this problem is more pronounced. Many chips temperature "bottoms out" at a high enough temperature to notice.
In your case it seems to be at 34C, some others have reported even a 42c limit on their CPU.
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Core Temp - Accurate temperature monitor for Intel's Core/Core 2 and AMD64 processors

dezzo
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Re: CPU Temperature Never Lower Than 34 Degrees

Post by dezzo »

I see, that is interesting information.
I tried to find more information on the "sticky sensors" issue, but did not find very much on Google after a cursory search.

So, just to be clear... If my E7500 CPU is showing 34 degrees, than the CPU is actually 34 degrees or lower? There is no chance it is actually higher than 34? Any readings above 34 degrees will actually be accurate?

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Re: CPU Temperature Never Lower Than 34 Degrees

Post by The Coolest »

Right, it means that when you see 34c the CPU is either at 34 or lower.
Main rig:
AMD Ryzen 9 5950X (True Spirit 140 Direct) / Mobo: Asrock Fatal1ty X470 / EVO 970 500GB + WD Blue 250GB + HDD / GPU: Dell RX 570 4GB / Mem: 2x16GB DDR4-3200 G.Skill 32GTZKW TridentZ - 32GB total / PSU: Seasonic Prime Ultra Gold 650W
NAS:
Core i7 2600K 3.4GHz @ 4.3GHz (Scythe Mugen2) / Mobo: Biostar TP67XE / 2x Inland Pro 120GB + HDDs / GPU: ATi Mach64 VT2 / Mem: 4x4GB DDR3-1600 G.Skill 8GBXL RipJawsX - 16GB total / PSU: Seasonic S12II 620W.
Secondary rigs:
Core i3 7130U / MiniPC / SanDisk SDSSDP-128G / GPU: Intel HD 620 / Mem: 1x8GB DDR3L-1600
Xeon X3430 2.40GHz @ 3.06GHz or Core i3 540 3.06GHz @ 4.0GHz (Freezer 7 Pro) / Mobo: MSI H55M-ED55 / PNY CS1111 240GB / GPU: ATI FirePro V3800 / Mem: 4x2GB DDR3-1600 G.Skill 4GBRL RipJaws - 8GB total / PSU: Seasonic S12II 620W
AMD Phenom II X4 B93 / Mobo: ASUS M2A-VM / GPU: ATI Radeon Xpress X1250 / Crucial M4 120GB / Mem: 2x2GB DDR2-800 - 4GB total / PSU: Antec 380W.

Core Temp - Accurate temperature monitor for Intel's Core/Core 2 and AMD64 processors

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