i7 8700K high temperatures with NZXT Kraken X63 liquid cooler

[Zerbee]

Hey! I just mounted an NZXT Kraken X63 because I wanted to overclock my i7 8700K. I clocked it to 4.8 Ghz at 1.350V but I'm getting very high temperatures during stress tests. 
Have tried various stress tests such as OCCT, Intel Burntest and with all of them the CPU sometimes comes up in spikes at even 97 degrees, and steady around 89-92 degrees. 
In for example BFV which is pretty CPU demanding, I am at about 77-82 degrees, while in Rainbow Six Siege around 55-60 degrees.
I have connected everything correctly, the pump runs at 2800rpm, the fans are connected to SYS_FAN on the motherboard so that I'm able to make a custom fan curve. 
I have tried both Arctic Silver and Thermal Grizzly thermal paste with only minor changes. Also tried to run without overclock but then it's only about 2 degrees colder..

Specs:
MSI MAG Z390 Tomahawk motherboard
32GB Corsair DDR4
i7 8700K @ 4.8Ghz
ASUS RTX 2070 Super OC
ASUS Rog 850W PSU

What could be wrong? Is there any function in the BIOS I need to change?

[Sauron]

They're not that high given the overclock... and they're definitely not dangerous. You can try reapplying the thermal paste but there's no guarantee it will get better.

[xhackforeverxdx]

Have the same cpu at 4.7 with 1.25 core and even i spike into the 90s on heavy stresstests with a half decent 240 aio running fine like that since i bought it haha and no its not my cooler had 2 diff ones and even a big air cooler spiked into the 90s i just gave up at that point 

[Zerbee]

12 minutes ago, Sauron said:

They're not that high given the overclock... and they're definitely not dangerous. You can try reapplying the thermal paste but there's no guarantee it will get better.

Hm alright

 

My friend that has the exact same case, CPU and cooler is only getting top spikes at around 86-ish.. we even use the same thermal paste. Aswell as he's running at 5Ghz with offset at -300Mhz. I don't get why my spikes are getting so high, ran another stress test and got 100 at the highest point.

[Zerbee]

Just now, xhackforeverxdx said:

Have the same cpu at 4.7 with 1.25 core and even i spike into the 90s on heavy stresstests with a half decent 240 aio running fine like that since i bought it haha and no its not my cooler had 2 diff ones and even a big air cooler spiked into the 90s i just gave up at that point 

Well, guess i'll have to deal with this then :')

[-rascal-]

13 minutes ago, Zerbee said:

Hm alright

 

My friend that has the exact same case, CPU and cooler is only getting top spikes at around 86-ish.. we even use the same thermal paste. Aswell as he's running at 5Ghz with offset at -300Mhz. I don't get why my spikes are getting so high, ran another stress test and got 100 at the highest point.

 

AVX offset of -300 MHz?

So your friend is running 5.0 GHz, but 4.7 GHz when AXV instruction sets are detected / used.

 

Are you able to run 4.8 GHz stable with slightly reduced voltage?

Like...1.34V / 1.32V, etc?

 

Are you seeing 97*C for the hottest core, or is this the CPU package?

 

"Power Viruses" like OCCT / Prime95 will work the CPU harder than games, and typical tasks -- that is the whole purpose of it.

Temperatures being much more...mild...when actually gaming is normal.

 

[DarkSmith2]

Before and after delidding:

 

My 8700k hasnt ever seen 80°C. 

If temp spikes occur, its most likey either bad cooler mounting, bad aio pump or bad factory thermal paste application below IHS / crooked glued IHS.
When its not just inconsistent load or bad readings.

[-rascal-]

23 minutes ago, DarkSmith2 said:

Before and after delidding:

 

My 8700k hasnt ever seen 80°C. 

If temp spikes occur, its most likey either bad cooler mounting, bad aio pump or bad factory thermal paste application below IHS / crooked glued IHS.
When its not just inconsistent load or bad readings.

 

Damn, that's pretty significant temperature drop with a simply delid.

Hmmm...might have to consider doing that too with my i7-8086K.

Did you use a delid tool, and reseal it afterwards?

 

[DarkSmith2]

25 minutes ago, -rascal- said:

 

Damn, that's pretty significant temperature drop with a simply delid.

Hmmm...might have to consider doing that too with my i7-8086K.

Did you use a delid tool, and reseal it afterwards?

 

I did use Chinamate2 from ebay. (its not really called chinamate2) LUL one of those cheap things, It was like 5bucks including shipping.
looks like this:

 

I didnt reseal it because there is no point in doing that. Its just held in place by the ILM (Intel mechanism that holds your CPU in its socket)
It doesnt move anywhere, its pretty secure.

[Zerbee]

1 hour ago, -rascal- said:

 

AVX offset of -300 MHz?

So your friend is running 5.0 GHz, but 4.7 GHz when AXV instruction sets are detected / used.

 

Are you able to run 4.8 GHz stable with slightly reduced voltage?

Like...1.34V / 1.32V, etc?

 

Are you seeing 97*C for the hottest core, or is this the CPU package?

 

"Power Viruses" like OCCT / Prime95 will work the CPU harder than games, and typical tasks -- that is the whole purpose of it.

Temperatures being much more...mild...when actually gaming is normal.

 

Yeah AVX offset -300Mhz. And like i said he’s getting a top peak at around 86 when stress testing at 1.350V. But somehow i get 10-15 degrees higher peaks.

 

I tried putting everything back to Auto settings and tried with MSI Enhanced turbo which runs it at 4.7Ghz with auto voltage (max 1.350V), but still in a run of Flight Simulator 2020 as soon as it loaded in the textures and map it quickly peaked at 97 degrees and went back down to around 86.

 

I’m seeing 97 at the hottest core, yes.

 

Yeah i know stress tests pushes it to the limit, but like i said 97 degrees spikes in Flight Simulator doesn’t feel right..

[Zerbee]

1 hour ago, DarkSmith2 said:

Before and after delidding:

 

My 8700k hasnt ever seen 80°C. 

If temp spikes occur, its most likey either bad cooler mounting, bad aio pump or bad factory thermal paste application below IHS / crooked glued IHS.
When its not just inconsistent load or bad readings.

Hm.. well everything is mounted as it should. Pump running at 2800rpm, replaced thermal paste 3 times with same temps..

[xg32]

10 minutes ago, Zerbee said:

Hm.. well everything is mounted as it should. Pump running at 2800rpm, replaced thermal paste 3 times with same temps..

the 8700k just has poor ihs and contact without a delid, which is usually a 20-25C diff, it's an option, though running 85-90C in intensive games are fine, i'd try lowering the voltage to see if it's stable if you don't wanna delid.

[DarkSmith2]

56 minutes ago, Zerbee said:

Hm.. well everything is mounted as it should. Pump running at 2800rpm, replaced thermal paste 3 times with same temps..

Just because your pump reports 2800rpm, doesnt mean that this is actually accurate. this is how AiO's die all the time.. 

 

I had 3 AiO's that had failing pumps, non of them showed any significant symptom of dieing besides temperature spikes, and maybe sometimes a little noise.

its enough if its just a dropout here and there, it can be so small that it cant even be read via software.

43 minutes ago, xg32 said:

the 8700k just has poor ihs and contact without a delid, which is usually a 20-25C diff, it's an option, though running 85-90C in intensive games are fine, i'd try lowering the voltage to see if it's stable if you don't wanna delid.

yea but in this case 100°C - ~20°C at 1.35v = 80°C doesnt sound good. If you reach that with a 240mm aio on a delided 8700k, something is up with your cooling. Either not powerful enough or defective. I mean its max. ~140watt of heat to dissipate... 240mm aios should be able to dissipate atleast 180watts of heat.

[SFFDesigns]

If you want to delid, you can. Not all 8700K's have the same binning, so your might just not be a great overclocker (my 3700X isn't either).

 

I'd recommend paying $35 for silicon lottery to delid though if you do

[Zerbee]

10 hours ago, xg32 said:

the 8700k just has poor ihs and contact without a delid, which is usually a 20-25C diff, it's an option, though running 85-90C in intensive games are fine, i'd try lowering the voltage to see if it's stable if you don't wanna delid.

Alright. What is considered a stable voltage for 4.7/4.8Ghz?

[Zerbee]

11 hours ago, DarkSmith2 said:

Just because your pump reports 2800rpm, doesnt mean that this is actually accurate. this is how AiO's die all the time.. 

 

I had 3 AiO's that had failing pumps, non of them showed any significant symptom of dieing besides temperature spikes, and maybe sometimes a little noise.

its enough if its just a dropout here and there, it can be so small that it cant even be read via software.

yea but in this case 100°C - ~20°C at 1.35v = 80°C doesnt sound good. If you reach that with a 240mm aio on a delided 8700k, something is up with your cooling. Either not powerful enough or defective. I mean its max. ~140watt of heat to dissipate... 240mm aios should be able to dissipate atleast 180watts of heat.

I mean of course the pump might not run at 2800rpm even though it’s saying so, but since the value’s jumping up and down around 2780-2820, and getting lower when i put it in silent mode i’m assuming it’s working as it should. I can also feel small vibrations coming from the pump.

 

but yeah it doesn’t feel right with 95 degrees spikes for a 280mm cooler on a 8700K at ”only” 4.7 Ghz. My CPU is NOT delided though.

 

however on idle im getting 35-38 degrees and in less intense games around 55-62, but then again whenever background applications are running i get these spikes at up to 95.

[xg32]

2 hours ago, Zerbee said:

Alright. What is considered a stable voltage for 4.7/4.8Ghz?

iirc 4.7 was the lowest bin (been awhile) and it was somewhere around 1.32v, that was the worst case scenario though, so try lowering it from there as long as it's stable.

[Mick Naughty]

 If youre up for it, the cheap ebay tool and some lm is a good investment. 

I can run mine in the mid 40's if I wanted. But I do have a custom loop. 

I have a good overclocking chip on a cheap board. Run 5.0 at 1.32.