jfriend00 :
mgodeke1995 :
I'm not stupid, I always keep my CPU below 99 degrees celsius and I'm using one of the best coolers, it's mounted directly on the die and it's a Thermalright IB-E Extreme. Also, I will say from experience with past overclocking that if you perfectly dial in the Vcore voltage, your CPU will become unstable and your system will crash before it gets so hot that it damages the CPU. As the temp increases it needs more voltage to remain stable, which creates sort of a "thermal throttling" if you will, but instead of the CPU actually throttling down, it just crashes. That happens due to the physics of how CPUs respond to voltage at different temps, not due to software of course.
If you had a good cooler installation, your CPU should not be above 85C and should never trigger thermal throttling. If you're in the high 90s, then something is likely wrong with the cooler installation. Either bad thermal mount to the die, insufficient cooler air flow or insufficient case air flow or something related.
FYI, I'm running a somewhat similar looking air cooler (Noctua NH-D15) on an i7-9700k and can run 5.0GHz with Prime95 for a long time and stay below 83C without turning any thermal throttling off.
Also, if you want people to help you here, lose the attitude. Just trying to help dude. Triggering thermal throttling means insufficient cooling for the load you're applying - period.
I Second this.
Now in response to the OP:
I'm 100% sure nobody in this forum will say any temp barely below 99C is safe for any chip. Very likely there will be temp spike it hits 100C or even above.
Please refer this Intel Temperature Guide:
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
Excerpt from the article:
"Here's the nominal operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are ideal."
Also take a closer look at
SECTION 6 - THROTTLE TEMPERATURE
9th Generation 14 nanometer i7 9700K / i5 9600K (TDP 95W / Idle 2W),
8th Generation 14 nanometer i7 8700K / i5 8600K (TDP 95W / Idle 2W),
7th Generation 14 nanometer i7 7700K / i5 7600K (TDP 91W / Idle 2W),
6th Generation 14 nanometer i7 6700K / i5 6600K (TDP 91W / Idle 2W):
Tj Max (Throttle temperature) = 100°C
5th Generation 14 nanometer i7 5775C / i5 5675C (TDP 65W / Idle 2W):
Tj Max (Throttle temperature) = 96°C
4th Generation 22 nanometer i7 4790K / i5 4690K (TDP 88W / Idle 2W),
4th Generation 22 nanometer i7 4770K / i5 4670K (TDP 84W / Idle 2W):
Tj Max (Throttle temperature) = 100°C
As you can see, the throttle temperature for these chips are quite high, instead of the 80C that you claimed.
Therefore, if you constantly hit thermal throttling (assuming this is the correct cause), then you must be running your chip around 100C all the times. I'm not sure anybody on this forum will say this is a good idea that is worth defending!
"Triggering thermal throttling doesn't necessarily mean insufficient cooling" - Yes it does. If you have the appropriate cooling, you will 100% NOT experience thermal throttling. After all, this is exactly what thermal throttling was created for!".
With regard to your Vcore, that is also an extremely high number that would shorten the life of your chip significantly. 1.4 Vcore should be the absolutely max you should go with. I have barely seen anybody going above 1.4, let alone 1.5 just for a 5.0 Ghz overclock.
Honestly, most i7 chips hit 5.0 Ghz with 1.25 Vcore easily, translating to a temp of less than 80C. If you chip requires 1.4~1.5 Vcore all the times to run just 5.0 Ghz, then you just have a really bad chip.
Regarding cooling solution, I have an average AIO (EVGA 280 clc with custom Noctua fans) and I'm running my
i7-8700k @5.2 Ghz with a max temp of 72C when stressing under Prime 95.5 version 26.6 small FFT test for 10 hours.
So when you say you have "
one of the best coolers", IDK how that translates to nearly 100C which cause thermal throttling. Whatever cooler you're currently having, if the vendor claimed it is one of the best coolers, I would say scam. Either this or your thermal paste is applied wayyyy wrong, which, even if so, shouldn't raise temp to 99~100C.