i7 - 4790K @ 100C - Please Help

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Libertarian1984

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Jul 14, 2014
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I am building my first computer and I am running into high temps (99C-100C). I tried looking up the answer but it seems every build is different, so here I am. Any help you can give would be great. Below are the particulars.

All testing was done with Prime95 small Fft's and HW Monitor/Real Temp

Temps

-H100i no overclock stable at 60C
-H100i with overclock at 4.8ghz and 1.375 volts - 99C but still stable (Ran for only 10min)
-Stock cooler runs at 99C with no overclock
*had problems originaly with H100i bracket being loose and when i tried to replace it I broke a standoff
*I always applied new thermal paste when switching coolers

Could it be?

-My power supply is way to big (I was going to add a Gtx 780 later) could that be causing this?
-I was terrified putting in the CPU, would a bent pin cause this? I really don't want to remove and check it.

Whole build

Motherboard: ASUS Z7-A
CPU- 4790K
Graphics- Quadro K2000
Memory- Adadt XPG 16GB MHZ 1600 (I tested it with Memtest86 and it looks fine)
Power Supply- XFX P1-850B-BEFX 850W
Cooling- Corsair H100i
SSD- 500GB Samsung Evo
Hard Drive- WD 1TB Black
Case- Fractal Define R4

Any help you guys can give would be greatly appreciated. I am so stuck. I don't know where to even begin. This being my first build I can't even swap parts out until I find the culprit. Sorry for babbling.
 
Solution
CompuTronix
Your temperatures are too high because your Vcore is too high.

For 22 nanometer processors, voltages above 1.300 are definitely NOT recommended. High Vcore is the primary cause of Electromigration - https://www.google.com/?gws_rd=ssl#q=Electromigration - which prematurely erodes the traces and junctions within the processor's layers and nano-circuits. This will eventually result in blue-screen crashes (BSOD), which will become increasingly frequent over time.

CPU's become more susceptible to Electromigration with each Die-shrink, so 22 Nanometer architecture is less tolerant of over-volting.

I strongly recommend that you back it down. Whatever stable clock speed you can achieve at 1.300 Vcore should be considered as the best...
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derekmd

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Dec 15, 2011
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My 4790k runs just like yours at that voltage. I am currently at 1.160 @ 4.4 using a H105i cooler. at 1.3vcore I am in the mid 90s running linpack. From my current knowledge, most people are deliding to get that kinda OC and keep temps down. My advice is lower the OC and voltage and be happy.

Good Luck.
 
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CompuTronix

CompuTronix

Intel Master
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Nov 13, 2006
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Your temperatures are too high because your Vcore is too high.

For 22 nanometer processors, voltages above 1.300 are definitely NOT recommended. High Vcore is the primary cause of Electromigration - https://www.google.com/?gws_rd=ssl#q=Electromigration - which prematurely erodes the traces and junctions within the processor's layers and nano-circuits. This will eventually result in blue-screen crashes (BSOD), which will become increasingly frequent over time.

CPU's become more susceptible to Electromigration with each Die-shrink, so 22 Nanometer architecture is less tolerant of over-volting.

I strongly recommend that you back it down. Whatever stable clock speed you can achieve at 1.300 Vcore should be considered as the best overclock your processor is capable of giving.

You might want to give this a read: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

From the Guide:

" ... Vcore settings should not exceed the following:

-> Core 2

1st. Generation 65 Nanometer ... 1.50 Vcore
2nd Generation 45 Nanometer ... 1.40 Vcore

-> Core i

1st. Generation 45 Nanometer ... 1.40 Vcore
2nd Generation 32 Nanometer ... 1.35 Vcore
3rd Generation 22 Nanometer ... 1.30 Vcore
4th Generation 22 Nanometer ... 1.30 Vcore ... "

CT :sol:
 
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Solution
CompuTronix

CompuTronix

Intel Master
Moderator
Nov 13, 2006
6,374
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Also:

" ... The 22 Nanometer Problem:

Core i 3rd and 4th Generation processors are very sensitive to small increases in voltage and frequency. When overclocked, temperatures can skyrocket above 90C at 100% workload, so high-end air or liquid cooling is critical. 22 Nanometer processors are more difficult to cool than previous Generations for three reasons:

(1) The 3rd and 4th Generation 22 Nanometer Die has 35% less surface area in contact with the underside of the Integrated Heat Spreader (IHS) than the 2nd Generation 32 Nanometer Die.

(2) 3rd and 4th Generation processors have over 20% more transistors packed into this smaller Die size than 2nd Generation processors.

(3) 3rd and 4th Generation processors use Thermal Interface Material (TIM) between the top of the Die and the underside of the IHS instead of solder, which was used in 2nd Generation and earlier processors.

Since the bonding material which seals the perimeter of the IHS to the package is slightly too thick, this tends to increase the space between the underside of the IHS and the Die, which can cause the TIM to compress unevenly. The effect of this manufacturing procedure is that many processors show a wide variation between Core temperatures, or one Core which runs much hotter than it's neighbors.

This has encouraged some overclockers to "de-lid" or remove their processor's IHS, which basically involves thoroughly removing the bonding material, replacing only the TIM and then restoring the IHS. Typical results are significantly lower Core temperatures and less variation between Cores. There are several YouTube videos that show different methods, but beware that it will obviously void your warranty, and it's not difficult to damage or destroy your processor.

Intel has addressed these thermal problems in their Haswell refresh. The Devil's Canyon processors have an improved IHS alloy and a new Polymer TIM. Although not as thermally efficient as solder, temperatures have been improved by several degrees.

Regardless, 4th Generation processors differ from their 3rd Generation counterparts in that they have the voltage regulators on-Die which increases their TDP (Thermal Design Power), so 4th Generation processors run hotter at 100% workload than any of their predecessors. ... "

CT :sol:
 
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