8086K Advice

[Unkindness]

Finally got my CPU and have been reading up on a bit of Overclocking.

Currently have it clocked to 5Ghz on all cores.

Running Prime 95 stress on it to see how she goes but notices a bit of a difference in core temps. 20 minutes in and it's looking strange.

Cores #0,2,3,4,5 are all between 80 and 93 degrees Celsius but #1 is at 51!

Am I missing something here? Running a Z390 Aorus Master with a D15S cooler in a Meshify C. Monitoring with HWiNFO64 with TjMAX of 100 C.

Cheers

[Sauron]

It might be a faulty sensor or a bug in the software. Either way, 93⁰ C is a bit too warm for comfort... your cooler should handle that better. Make sure it's properly seated and that the thermal paste is making good contact.

[jones177]

I run a i7 8086k at 5ghz all cores with the same cooler.

The temps you get in Prime95 depend how you set it up. I use der8auer's settings with minimum & maximum FFT set to 1344 aloge with run FFTs in place. With that setup I get 91c max. 

The point running Prime95 is if you are not crashing you win. 

 

For real world temps I use Cinebench. I max at 88C on it.  

 

 

 

 

 

[Unkindness]

I ran it for about half an hour with no crash and only stopped coz of the temp on that core. Will play with it tomorrow and see what I come up with

[Kalm_Traveler]

is it delidded + liquid metal yet? 

 

if not, I would strongly recommend that. Drops temps by quite a bit. When I had mine I believe across the board I saw about a 17 c average temp reduction.

[_Aontaigh_]

7 hours ago, Sauron said:

It might be a faulty sensor or a bug in the software. Either way, 93⁰ C is a bit too warm for comfort... your cooler should handle that better. Make sure it's properly seated and that the thermal paste is making good contact.

 

When it comes to Prime95, which is nothing more than a power virus, temperatures can be entirely disregarded as long as they are below the processor's TJ Max.

 

Prime95, when used properly, is the absolute king of stability testing. It should not be used for thermal tests and it is in no way indicative of real word current draws.

[_Aontaigh_]

7 hours ago, Sauron said:

It might be a faulty sensor or a bug in the software. Either way, 93⁰ C is a bit too warm for comfort... your cooler should handle that better. Make sure it's properly seated and that the thermal paste is making good contact.

 

When it comes to Prime95, which is nothing more than a power virus, temperatures can be entirely disregarded as long as they are below the processor's TJ Max.

 

Prime95, when used properly, is the absolute king of stability testing. It should not be used for thermal tests and it is in no way indicative of real word current draws.

 

8 hours ago, Unkindness said:

Cores #0,2,3,4,5 are all between 80 and 93 degrees Celsius but #1 is at 51!

Am I missing something here? Running a Z390 Aorus Master with a D15S cooler in a Meshify C. Monitoring with HWiNFO64 with TjMAX of 100 C.

Cheers

 

 

Does one of your threads say "Work Stopped" as seen in the above screenshot for Worker #3?

[Sauron]

11 minutes ago, _Aontaigh_ said:

 

When it comes to Prime95, which is nothing more than a power virus, temperatures can be entirely disregarded as long as they are below the processor's TJ Max.

 

Prime95, when used properly, is the absolute king of stability testing. It should not be used for thermal tests and it is in no way indicative of real word current draws.

Sure, but I'm saying it's still pretty high even for prime95 and could be an indicator of a bad cooler mount. Since his concern is also based on temperature, I wouldn't dismiss the idea. Then again @jones177 says he got similar temps with a similar setup, so I may have overestimated the nh-d15.

 

Either way an oddity such as this one is more likely to be caused by a bug with the sensor monitor or a defective sensor.

[Unkindness]

@_Aontaigh_, @jones177and @Sauron 

 

I'm brand new to all of this so all input is helping me greatly so first off, thank you guys. 

 

After doing a bit of a look over the logs, it does appear that prime wasn't running properly.

 

It looks like that #1 was running less than 5% with the heat sensor picking up background heat from the other cores. #4 also seemed not to running at full wack either, around 60-75%, which would explain the temp range of 80-93 over 5 cores being so large. I was expecting a range of maybe 90-95 knowing what type of stress Prime puts on systems. 

 

I did have a brief 5 minute run last night and all cores came up at full tilt and relatively even temp increases but couldn't get meaningful temps on such a short run.

[Unkindness]

16 hours ago, Kalm_Traveler1 said:

is it delidded + liquid metal yet? 

 

if not, I would strongly recommend that. Drops temps by quite a bit. When I had mine I believe across the board I saw about a 17 c average temp reduction.

No interest in doing this. Very new to PC building and not risking my CPU.

I know the chip can take the 5ghz clock, my cooler is doing as advertised and my board is designed for it so happy taking that risk.

I don't and probably won't be using the PC for a workload that will replicate the stresses that prime puts on it anyway.

[_Aontaigh_]

I would recommend you use version Prime 95 v26.6 [Official Download: https://www.mersenneforum.org/showthread.php?t=15504]

 

Later versions use the AVX and AVX2 instruction sets, among others introduced, which are extremely unrealistic loads for virtually all users.

 

If you get the message "Worker Stopped", as shown in that earlier screenshot, it means that core did not calculate a number to the accuracy expected meaning your overclock is unstable. The next step would be to incrementally increase vCore until you are able to run the test for a number of hours.

[Unkindness]

So I'm having more issues. I was playing with the overclock and the vCore voltage today and found I could get stable overclock at 4.5 and 5 but 5.2 was pushing it a bit.

So once I got it stable I started the p95 stress and after about 15 minutes, I started to get TjMAX on all cores at 5 and 4.5.

I'm wondering because all my fans bar the exhaust are pressure fans, could I be suffering with not enough airflow in the case? Could it be I have too much thermal paste because I was a touch heavy handed with it? Have I just a bad set up? Airflow is 2x 140mm Noctua Chromax intakes and 1x 120mm Fractual Design Dynamic exhaust with the standard fan in the D-15.

Also, I found that p95 kept crashing when I manually set the volts at 1.25, 1.3, 1.35 and 1.4 but ran until TjMAX on auto volts in the BIOS, can this be another reason it's so unstable at higher frequencies?