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i7 3770K, high temps and (core 0) 10 degrees lower

post #1 of 6
Thread Starter 
Hello,

z77x-ud5h
i7 3770k
Corsair H100

I have a temperature problem with my 3770k, temperatures are high and there is a difference of 10 degrees between (core 0) and the other cores.

Example:

OC @ 4.5 ghz / 1.295 vcore bios / 1.256 multimeter

Test Prime95 20k FTT 15min
temps 74 83 84 78

I decided to delid and apply new thermal paste on the die, suspecting a bad spread. ( i used as5 on the die, i got coollaboratory liquid ultra on order)

Results:

OC @ 4.5 ghz / 1.295 vcore bios / 1.256 multimeter

Test Prime95 20k FTT 15min
temps 70 80 80 80

Ok i got one part of the problem solved, but there is still a 10 degrees gap on (core 0). I tried to clean and reapply thermal paste on the die and ihs 3 time to get a better spread but i get the same results.

Should i lap the base of my Corsair H100 and the IHS ? Or is it normal to have a 10 degrees gap on (core 0).

Thank you.
post #2 of 6
I have that issue but reversed, core 3 is usually ten lower. I haven't delid though. I think there was something about how the cores are arranged on the die that cause it.

That AS5 will take 200hr cure time to get to lowest temps and maybe that will help further.
post #3 of 6
what do u mean by 200hrs cure time?
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Encoder PC
(12 items)
 
3D movies
(9 items)
 
HTPC/Gaming PC
(11 items)
 
CPUMotherboardGraphicsRAM
4770k asus grphton  4550 4GB (2x2GB) Adata Gaming  
Hard DriveCoolingCoolingOS
1x 750GB, WD 640GB, 4x 1TB ( 3x Seagate 1TB & 1... EK Supreme HF (acteal/nickel) Phobya NB Eloop fans  Windows 7 
PowerCaseOtherOther
antec BP 550w SM8 ST30 240 UT60 
MotherboardGraphicsRAMHard Drive
ASUS M5A99X EVO AM3+  3450 gskill DDR3-1600 Western Digital  
Hard DriveCoolingCoolingOS
Western Digital  Corsair H50 corsair SP120 Windows 7 
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Caselab M8 
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post #4 of 6
Sometimes, especially with high overclock, one core is going to get hotter than the rest. That's just the nature of the beast. If you continue increasing the overclock, you'll find that the hot core will usually end up being the one that starts to produce errors and/or gets damaged first due to excessive voltage.

It could also be a calibration issue with the thermal sensor -- you have no way of really verifying that the sensor is accurate, it could be that the core is really the same temp as the others but the sensor becomes progressively more inaccurate as temps go higher.

Greg
post #5 of 6
Cure time is the time for the TIM to fully settle and achieve maximum heat transfer. AS5 has a long cure time. Other TIM's have much shorter or no cure times.

That also doesn't seem like a very good drop in temperatures. You only need a very small amount between the Bare Die and IHS.
Also is the block seated well to the socket? There might not be enough pressure which would allow for poor contact.

I'd expect between 60-70'c with a 4.5 overclock.
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i7 3770k Asus P8Z77-V EVGA GTX780 SC ACX Samsung DDR 3 (2 DIMMS) MV-3V4G3D/US 
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Samsung 830 SSD WD Caviar Black Asus DVD/RW Xigmatek s-1283 HDT (Air Cooling) 
CoolingCoolingOSMonitor
Scythe Slipstream 1200RPM (x2) Antec 140mm + Antec 120mm + Xigmatek 120mm (x2) Win 7 64bit Acer S243HL bmii - 24" 
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Corsair TX750 Corsair Carbide 300R MX 518 Auzentek X-Fi Forte 7.1 
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by Aparition View Post

That also doesn't seem like a very good drop in temperatures. You only need a very small amount between the Bare Die and IHS.
Also is the block seated well to the socket? There might not be enough pressure which would allow for poor contact.

I'd expect between 60-70'c with a 4.5 overclock.

Maybe my H100 mounting kit is to blame, i screw by hand and i get stopped by the screw making contact with the bracket, before i even have to apply any force. But again if i had poor contact woudnt the temps of all the cores even out instead of having 10 degrees lower temps on (core 0)?
Maybe i need to lap my H100 because i am getting good contact on only 1 side of the cpu.
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