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Should I re-apply the thermal paste?

post #1 of 7
Thread Starter 
Hi,
I'm fairly new to the OC scene and a few months back I build my first rig. At the moment my system is stable at 4.5 GHz (1.285V), however during Intel Burn Tests at max one of the cores is 10 degrees colder then the others.
When idle there is no difference, also below 60 degrees the difference does not exceed 5 degrees.
Since I believe the thermal sensor are designed for high temperatures I doubt that it's an inaccurate sensor. The largest difference would otherwise be at idle.
So, should I re-apply the thermal paste?
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yes
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post #2 of 7
I think the difference in temperature between cores is quite normal if we're talking about the i5-2500k here. Don't bother reapplying the thermal paste unless it's really bothering you that much.
    
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post #3 of 7
Thread Starter 
Hmmm, I just find it odd that only core is significantly cooler than the others. Also I find 72 degrees rather high for the applied voltage.
yes
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post #4 of 7
Just check your hottest core. If your hottest core is showing good cooling performance I'd say your good.
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post #5 of 7
Intel Burn Test stresses your CPU a lot harder than other stress tests. Getting above 70c is quite normal with IBT. Also, I used to worry about this when I first got my i5-2500k too. I reseated my Heatsink twice and Core 0 was always cooler than the other cores by 5-10c when running IBT.

I personally get about 76c max temps on IBT and about 68c max with Prime95
    
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Crucial M4 2.5-Inch Solid State Drive SATA 6Gb/s Western Digital Caviar Black Lite-On 24X Antec Kuhler 920 
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Windows 7 Professional Asus VW266H x2 Rosewill RK-9000 with MX Cherry Red switches Corsair TX650 
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CPUMotherboardGraphicsRAM
Intel Core i5 2500K Asus SABERTOOTH P67 NVIDIA GeForce GTX 560 Ti Corsair Vengeance 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 2.5-Inch Solid State Drive SATA 6Gb/s Western Digital Caviar Black Lite-On 24X Antec Kuhler 920 
OSMonitorKeyboardPower
Windows 7 Professional Asus VW266H x2 Rosewill RK-9000 with MX Cherry Red switches Corsair TX650 
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Lian Li PC-K63 Logitech G400 Steelseries S&S Asus Xonar STX Sound Card 
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Corsair SP2500 
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post #6 of 7
Thread Starter 
thanks for the help and quick replies!
I'll let it stay as it is then.

What temperature should I set the max at during IBT for futher overclocks?
yes
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.5GHz Asus P8Z68-V IGP HD3000 @ 1.9GHz  Kingston 8 GB 1600 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Vertex 3  Samsung EG 2TB WD Red 3 TB Samsung SH-S223C 
CoolingOSMonitorKeyboard
Scythe mugen 2 Rev. B Windows 8 Pro LG 32LG3000 Logitech K360 Purple Boulder 
PowerCaseMouse
Antec Basiq BP550Plus Xigmatek Midgard Logitech MX Air 
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Reply
yes
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.5GHz Asus P8Z68-V IGP HD3000 @ 1.9GHz  Kingston 8 GB 1600 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Vertex 3  Samsung EG 2TB WD Red 3 TB Samsung SH-S223C 
CoolingOSMonitorKeyboard
Scythe mugen 2 Rev. B Windows 8 Pro LG 32LG3000 Logitech K360 Purple Boulder 
PowerCaseMouse
Antec Basiq BP550Plus Xigmatek Midgard Logitech MX Air 
  hide details  
Reply
post #7 of 7
It depends on your comfort level. I personally would not want my processor going over 80c for a 24/7 machine.
    
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Asus SABERTOOTH P67 NVIDIA GeForce GTX 560 Ti Corsair Vengeance 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 2.5-Inch Solid State Drive SATA 6Gb/s Western Digital Caviar Black Lite-On 24X Antec Kuhler 920 
OSMonitorKeyboardPower
Windows 7 Professional Asus VW266H x2 Rosewill RK-9000 with MX Cherry Red switches Corsair TX650 
CaseMouseMouse PadAudio
Lian Li PC-K63 Logitech G400 Steelseries S&S Asus Xonar STX Sound Card 
Audio
Corsair SP2500 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Core i5 2500K Asus SABERTOOTH P67 NVIDIA GeForce GTX 560 Ti Corsair Vengeance 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 2.5-Inch Solid State Drive SATA 6Gb/s Western Digital Caviar Black Lite-On 24X Antec Kuhler 920 
OSMonitorKeyboardPower
Windows 7 Professional Asus VW266H x2 Rosewill RK-9000 with MX Cherry Red switches Corsair TX650 
CaseMouseMouse PadAudio
Lian Li PC-K63 Logitech G400 Steelseries S&S Asus Xonar STX Sound Card 
Audio
Corsair SP2500 
  hide details  
Reply
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