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Which Temp Reading is More Accurate?

post #1 of 6
Thread Starter 
Hey guys, I have a quick question.

So, I have an EVGA x58 4way Classified and for those who don't know, after post, the debugging display switches to display CPU temps.

I have an i7 920 running at 4.1ghz at 1.341V (I will try and lower that soon) and it is being cooled by a Corsair H70 with upgraded fans.

So here is my question:
My Mobo displays my current temp at 31C, whereas software (currently CPUID's Hardware monitor says it is at 48C.

So which one is more correct? Is either more accurate? Because that is a big difference in temps.

Thanks Guys, I appreciate it.
My System
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CPUMotherboardGraphicsRAM
Core i7 920 @ 4.0GHz-1.27Vcore w/HT EVGA Classified E762 4-way Sli 2x GTX 670 SC 4GB in SLI 12GB Mushkin @ 1699MHz at Cas7 
Hard DriveOSMonitorKeyboard
Raid 0 with 4x 250GB Samsung 840s for 1TB SSD w... Windows 7 Ultimate 64bit Triple LG 23" LED IPS monitors Custom Max Keyboard Nighthawk 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 4.0GHz-1.27Vcore w/HT EVGA Classified E762 4-way Sli 2x GTX 670 SC 4GB in SLI 12GB Mushkin @ 1699MHz at Cas7 
Hard DriveOSMonitorKeyboard
Raid 0 with 4x 250GB Samsung 840s for 1TB SSD w... Windows 7 Ultimate 64bit Triple LG 23" LED IPS monitors Custom Max Keyboard Nighthawk 
PowerCaseMouseMouse Pad
Corsair AX1200i Modded HAF 932 Black Edition Logitech G600 Razer Destructor 
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post #2 of 6
Hmm are you sure the temp that the motherboard is showing is for the CPU? I would download coretemp to see what you get with that, also you need to reset the tjmax to get the right temperature readings.
Kpnamja
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Seagate 500GB & 2TB Samsung 830 LG Blu-ray Thermaltake Frio 
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Kpnamja
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i5-2500k ASUS P8P67 PRO Saphire R9 290 Tri-X OC G.Skill 8GB 1866Mhz 
Hard DriveHard DriveOptical DriveCooling
Seagate 500GB & 2TB Samsung 830 LG Blu-ray Thermaltake Frio 
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Windows 7 64-bit Asus 23.6" & Dell 27" Ducky-9008 Brown Corsair HX750 
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by kpnamja View Post
Hmm are you sure the temp that the motherboard is showing is for the CPU? I would download coretemp to see what you get with that, also you need to reset the tjmax to get the right temperature readings.
Yep. Even Hardware Monitor displays both CPU temps from the Mobo reading and CPU temps from what it says it is.

And I am not worried about Max right now. I just posted the "current temps."

But if it matters, my max CPU according to mobo is 34C and my max via Hardware monitor is 52C
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 4.0GHz-1.27Vcore w/HT EVGA Classified E762 4-way Sli 2x GTX 670 SC 4GB in SLI 12GB Mushkin @ 1699MHz at Cas7 
Hard DriveOSMonitorKeyboard
Raid 0 with 4x 250GB Samsung 840s for 1TB SSD w... Windows 7 Ultimate 64bit Triple LG 23" LED IPS monitors Custom Max Keyboard Nighthawk 
PowerCaseMouseMouse Pad
Corsair AX1200i Modded HAF 932 Black Edition Logitech G600 Razer Destructor 
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Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 @ 4.0GHz-1.27Vcore w/HT EVGA Classified E762 4-way Sli 2x GTX 670 SC 4GB in SLI 12GB Mushkin @ 1699MHz at Cas7 
Hard DriveOSMonitorKeyboard
Raid 0 with 4x 250GB Samsung 840s for 1TB SSD w... Windows 7 Ultimate 64bit Triple LG 23" LED IPS monitors Custom Max Keyboard Nighthawk 
PowerCaseMouseMouse Pad
Corsair AX1200i Modded HAF 932 Black Edition Logitech G600 Razer Destructor 
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Reply
post #4 of 6
Well coretemp, Hardwaremonitor, and fanspeed temperature that display could all be incorrect. But i would at least download 2 of them to see if they differ, but most likely i would trust your motherboard unless its bugged
Kpnamja
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k ASUS P8P67 PRO Saphire R9 290 Tri-X OC G.Skill 8GB 1866Mhz 
Hard DriveHard DriveOptical DriveCooling
Seagate 500GB & 2TB Samsung 830 LG Blu-ray Thermaltake Frio 
OSMonitorKeyboardPower
Windows 7 64-bit Asus 23.6" & Dell 27" Ducky-9008 Brown Corsair HX750 
CaseAudio
NZXT Phantom Black/Orange RX-900 
  hide details  
Reply
Kpnamja
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k ASUS P8P67 PRO Saphire R9 290 Tri-X OC G.Skill 8GB 1866Mhz 
Hard DriveHard DriveOptical DriveCooling
Seagate 500GB & 2TB Samsung 830 LG Blu-ray Thermaltake Frio 
OSMonitorKeyboardPower
Windows 7 64-bit Asus 23.6" & Dell 27" Ducky-9008 Brown Corsair HX750 
CaseAudio
NZXT Phantom Black/Orange RX-900 
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post #5 of 6
In HWMonitor it shows CPU temp and the core temps. The LCD poster should be the same as the CPU temp. They are showing different temps CPU being slightly colder because they are different sensors.

Most of the time when temps get talked about here on OCN we are talking about the core temps or Tjunction temps. When Intel lists the max Tcase temp it is talking about the one listed as CPU in HWMonitor (or can also be listed as CPUTIN) and the temp on the LCD poster.
Monster IIr
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Tinker
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Monster IIr
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Tinker
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CPUMotherboardGraphicsRAM
i5 3570K ASRock Z77 Extreme6 MSI R7970 G.SKILL Ripjaws X 
Hard DriveHard DriveHard DriveHard Drive
WD Black 640GB Crucial M4 SSD Corsair 840 SSD Seagate  
Optical DriveCoolingOSMonitor
Samsung Cogage Arrow Windows 7 Alienware AW2310 
MonitorKeyboardPowerCase
Dell ST2410 BlackWidow Ultimate Corsair 850TX CM Sniper 
MouseMouse PadAudioAudio
Corsair M60 FUNC X-Fi Titanium HD  Sennheiser PC360 
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 FTW XFX 5850 Mushkin Blackline 4GB 
Hard DriveOptical DriveCoolingOS
Caviar Blue 640 Asus Corsair A70 Windows 7 
MonitorKeyboardPowerCase
Dell ST2410 Rosewill RK-800G Seasonic M12II 620 NZXT Gamma 
MouseMouse PadAudioAudio
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post #6 of 6
The temperature on the board is the surface temperature of the CPU; programs like RealTemp or CoreTemp measure the core temperatures.

For example:


Note how the CPU temperature is much cooler than the core temperatures.
Lian Li
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Lian Li
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Hard DriveHard DriveCoolingCooling
500GB Samsung F3 1TB Hitatchi EK Supreme HF Aquacomputer Kryographics Block/Passive Backplate 
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