UnknownName :
Is that okay?
I use LLC on High and it ran without bsod on prime95 with mqx temp of 95C
4.8 Ghz at 1.20 Vcore is good.
However, you also inform us that this clock speed was achieved
in conjunction with HIGH LLC (Load Line Calibration).
What LLC does is, it will increase your core voltage as the load gets higher to compensate for Vdrop (or Vdroop).
The higher your LLC setting (slope) is, the greater the voltage increase.
For example, at a very high LLC setting, your chip's Vcore is sitting at
1.20 V during idle. But when Prime95 puts it
under 100% tdp load, Vcore will shoot up to
1.30~1.35V, which of course translates to the high temperature you're seeing.
So yes, on paper, you achieve 4.8 GHZ at 1.20 Vcore.
But in reality, under load, you only achieve 4.8 GHZ at 1.30~1.35 Vcore.
My suggestion is that you
reduce your LLC setting. There are different levels of LLC and each specific motherboard will have a different way of presenting and modifying LLC. You will have to google how to do this with your particular motherboard (which you have not told us yet).
On a side note, 95C under prime95 is extremely high and should never be a good temp for long-term usage of your 8700k.
What version and what specific test of prime95 did you run?
If you haven't already, make sure you use
Prime95 version 26.6 and run
Small FFT test (not the Blend test, which yield lower temperature than Small FFT).
With regard to testing time, 15 minutes isn't enough to call a chip stable, at least to me personally. I would leave prime95 running for at least
2 hours ~ 6 hours (or overnight if you don't want to sit staring at your computer for hours).
Some people even do 10~12 hour Prime95 run but that's up to you. I believe 6 hour run is a good amount.
Lastly, just like everyone has said, if you plan to overclock your 8700k to any significant amount, you "MUST" upgrade to a better cooler. If you like water cooling, get at least a 240mm liquid cooler for entry level.
Cheers.
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