8700k running hot!

[Adz20]

Hi all,

 

I finished building my new 8700k gaming rig yesterday and the neccessary specs to determine temperatures are as follows:

 

Mobo: ASUS Z370-f (I know this had vdroop issues when it first released).

 

CPU: I7 8700K

 

Cooler: NZXT Kraken X62

 

Case: S340 elite

 

Rear/top case fans: NZXT AER RGB 120mm

 

So, I jumped on and ran some benchmarks to make sure everything seemed ok. At idle i get 28-32C but when I ran Prime95 my 8700k instantly hit 95C+. I quickly stopped the test thinking i had not seated my Kraken X62 properly but then remembered about the vdroop issues with the z370-f mobo. I updated the BIOS and checked my voltage under load and the vdroop seemed fixed. I ran Prime95 again and temperatures  were better but still hit 80-84C.

 

When running PUBG i only hit around 63C max where my old rig containing a 2600k (4.5GHz with Hyper 212X) used to hit around 84C.

 

So my question is...do you think something is wrong or do these temperatures seem normal? Any recommendations on what to try?

[Guest]

Prime 95 isnt the normal test.... Try running something else strenuous.

[firecrafter711]

do you have an oc and what voltage do you have?

[Adz20]

Just now, Abyss Gaming said:

Prime 95 isnt the normal test.... Try running something else strenuous.

I was under the impression Prime95 was the best application to run to stress test overclocks on the CPU which i had done successfully with my 2600K in the past.

 

What other applications do you suggest i use for more accurate results?

[AresKrieger]

Prime 95 isn't by any means a realistic test so those temps are in all likely hood normal for it, however is it running all cores at max turbo as that would increase temps quite a bit (not that prime 95 would run cool regardless)

[Adz20]

Just now, firecrafter711 said:

do you have an oc and what voltage do you have?

sorry i forgot to mention. Completely stock 8700k. No OC as yet.

[AresKrieger]

Just now, Adz20 said:

I was under the impression Prime95 was the best application to run to stress test overclocks on the CPU which i had done successfully with my 2600K in the past.

 

What other applications do you suggest i use for more accurate results?

Aida 64, intel xtu if you want to know real world max temp for your setup

[Guest]

Just now, Adz20 said:

I was under the impression Prime95 was the best application to run to stress test overclocks on the CPU which i had done successfully with my 2600K in the past.

 

What other applications do you suggest i use for more accurate results?

I cant think of the specific one but honestly any game or other program that uses the CPU heavily. I knwo the 8700k runs hot but it might not be THAT hot

[Guest]

Just now, AresKrieger said:

Aida 64, intel xtu if you want to know real world max temp for your setup

Aida 64 was it

[Adz20]

Just now, AresKrieger said:

Prime 95 isn't by any means a realistic test so those temps are in all likely hood normal for it, however is it running all cores at max turbo as that would increase temps quite a bit (not that prime 95 would run cool regardless)

I was running the small FFT's test with all 12 threads so yee basically flat out.

 

What is a better application to use when i want to overclock my 8700k to get accurate results?

[Adz20]

3 minutes ago, AresKrieger said:

Aida 64, intel xtu if you want to know real world max temp for your setup

Beat me to it haha, awesome. Will give that a try. Thanks a lot!

[AresKrieger]

3 minutes ago, Adz20 said:

I was running the small FFT's test with all 12 threads so yee basically flat out.

 

What is a better application to use when i want to overclock my 8700k to get accurate results?

Here's some addtional info

 

I use intel xtu it is good for getting a baseline on an oc if you run it long enough, Prime 95 is good to try and break an oc to test for stability but intel xtu will give more realistic temperature numbers, aida 64 is similar in that regard just I don't personally use it

 

Oh and what I'm talking about is a feature some ASUS boards have enabled by default that essentially OCs all the cores to the single core max turbo value

[Adz20]

4 minutes ago, Abyss Gaming said:

Aida 64 was it

Yee awesome thanks mate. Ill definitely try Aida 64 tonight!

[Adz20]

Just now, AresKrieger said:

Here's some addtional info

 

I use intel xtu it is good for getting a baseline on an oc if you run it long enough, Prime 95 is good to try and break an oc to test for stability but intel xtu will give more realistic temperature numbers, aida 64 is similar in that regard just I don't personally use it

 

Oh and what I'm talking about is a feature some ASUS boards have enabled by default that essentially OCs all the cores to the single core max turbo value

I see. I might try both out and see which one i like better :).

 

I realised that after I replied to you haha. Its all 100% stock at the moment so whatever is on by default is what it will be on. Ill have to check tonight.

[Trulop]

Jay did a video showing his Asus board having a setting turned on by default that allowed not just 1-2 cores to ramp up to the max turbo of 4.7, but all 6 which could be your problem. The all core turbo should be like 4.3 or so, so when you run a test, see if all of your cores are going higher than that. If so, check the bios and look for the specific option and turn it off (cant remember exact name of it)

[AlwaysFSX]

I think Prime95 uses AVX now, which the 8700k has support for. Running 2 threads of AVX per core is going to generate an insane amount of heat.

[Adz20]

2 minutes ago, Trulop said:

Jay did a video showing his Asus board having a setting turned on by default that allowed not just 1-2 cores to ramp up to the max turbo of 4.7, but all 6 which could be your problem. The all core turbo should be like 4.3 or so, so when you run a test, see if all of your cores are going higher than that. If so, check the bios and look for the specific option and turn it off (cant remember exact name of it)

yee youre right. I remember seeing that one too!

 

Now that you mention it i think the turbo option may be on because i reckon i remember seeing the CPU hitting 4.7GHz on CPU-Z.

[Trulop]

Just now, Adz20 said:

yee youre right. I remember seeing that one too!

 

Now that you mention it i think the turbo option may be on because i reckon i remember seeing the CPU hitting 4.7GHz on CPU-Z.

Definately check that out, cause from what i understand, its basically overclocking the CPU to hit 4.7, but not as efficiently as a manual overclock, which could mean more voltage than needed and increased temps. that CPU should OC pretty easily to the 5GHz mark and sometimes to the 5.2 area with good cooling. Not sure why Asus still hasnt fixed that default thing because they said that its supposed to be off by default lol

[Adz20]

6 minutes ago, Trulop said:

Definately check that out, cause from what i understand, its basically overclocking the CPU to hit 4.7, but not as efficiently as a manual overclock, which could mean more voltage than needed and increased temps. that CPU should OC pretty easily to the 5GHz mark and sometimes to the 5.2 area with good cooling. Not sure why Asus still hasnt fixed that default thing because they said that its supposed to be off by default lol

ahhhhh i see. Well that makes me feel a little better  hopefully this is the case and its just because of the turbo mode being on.

 

Yee thats not good. The vdroop issue seems really dangerous too if people didnt know about it the CPU could be running on 1.4V + at times when its only clocked around 4.3GHz so it could be running at crazy temperatures for no reason.

[ToastyBear]

Honestly. Thats just intel and their shit TIM for their CPU dies. I get 100c on prime95. Instant thermal throttle. 

 

This is on water with 20c average water temp. My water didnt even heat up yet. Immediate max out temps. You actually need to delid if you want better temps. Never thermal throttle after the delid. 80c instead of 100c on p95. 50-60c while gaming. 

[Adz20]

11 minutes ago, ToastyBear said:

Honestly. Thats just intel and their shit TIM for their CPU dies. I get 100c on prime95. Instant thermal throttle. 

 

This is on water with 20c average water temp. My water didnt even heat up yet. Immediate max out temps. You actually need to delid if you want better temps. Never thermal throttle after the delid. 80c instead of 100c on p95. 50-60c while gaming. 

Is this with a 8700k? Do you have it overclocked?

 

I will seriously consider delidding it since i will keep it for a good 3 years or so i think so it might be worth it.

[TahoeDust]

Use Prime95 v26.6 "Blend" to tune your initial overclock.  Use current version of Prime95 "Blend" to set an appropriate AVX offset.  Use Realbench to further test stability.

[Simon771]

@Adz20

 

Did you try to test it with AIDA64 alread? CPU + FPU + Cache stress testing for something like 20min?

20min is not much for when you are testing yout stability OC, but it's enough to know your max CPU temp.

 

Just wondering if thermal are that horrible on CoffeLake

[Adz20]

1 minute ago, Simon771 said:

@Adz20

 

Did you try to test it with AIDA64 alread? CPU + FPU + Cache stress testing for something like 20min?

20min is not much for when you are testing yout stability OC, but it's enough to know your max CPU temp.

 

Just wondering if thermal are that horrible on CoffeLake

nope im still at work at the moment but ill be home in the next few hours and can post the results then.

 

Im pretty confident it is because of the ASUS turbo OC mode being on in the BIOS that is causing it so i think its running close to 1.3V and 4.7GHz currently and i didnt take note.

[Simon771]

Just now, Adz20 said:

nope im still at work at the moment but ill be home in the next few hours and can post the results then.

 

Im pretty confident it is because of the ASUS turbo OC mode being on in the BIOS that is causing it so i think its running close to 1.3V and 4.7GHz currently and i didnt take note.

But if temps will be okay with aida64, you can just leave it at 4,7GHz boost on all cores.

Maybe you need to set +6 ofset for AVX, so you won't get that high temps with prime95, but you will never go above temp that you get with aida64 anyway.