Strange Throttling 9700k (OrbitalWalsh)

[MxJames]

Hows it going buddy long time.

Still got that gigabyte z370 board, decided to upgrade the 8400 chip to a 9700k.

Had to strip and descale and refil my AIO anyway as it was making some strange noises.

Flashed the bio to F15b for 9th gen compatability.

Nearly doubled my cpu score in 3d mark and games were running much better.

Decided to put a moderate overclock on set vcore to 1.3 and multiplyer to 48

in prime95 and intel burn after about 8 mins the mhz will cycle every 3 seconds between 4800 and 800mhz when temps are under 60 degrees.

so i put bios back to stock just with XMP on. Still throttles back to 800hz on stock.

Games are fine because its only using about 60% cpu.

Also sometimes its showing my volts jump to 1.4 and even 2.0v once but im not sure if i believe that.

very strange any ideas chaps ?


EDIT: mobo is
Z370 AORUS Gaming K3

 

[Journey]

The motherboard VRM could be getting too hot.

 

[MxJames]

thanks, from what i read this gigabyte board has decent VRM? anyway to check if its getting hot and where are they lol

 

[robfosters]

@orbitalwalsh

 

[MxJames]

@orbitalwalsh

cheers

 

[Journey]

thanks, from what i read this gigabyte board has decent VRM? anyway to check if its getting hot and where are they lol

https://m.youtube.com/watch?v=HKeGOkJoiIA

 

[MxJames]

https://m.youtube.com/watch?v=HKeGOkJoiIA

oO nice one

 

[Journey]

oO nice one

Yeah, sorry it's an average board at best for high end 9th Gen power guzzling CPU's. Should be ok with games, especially if you do the mod.

 

[MxJames]

yea mate nice find. Any way to check before and after temps via a program on vrms ?

reckon i should get dif heat pad or just cut that washer for better fit ?

 

[Journey]

yea mate nice find. Any way to check before and after temps via a program on vrms ?

reckon i should get dif heat pad or just cut that washer for better fit ?

HWinfo64 should tell you the temps of everything if you run the sensors part of the program.

 

[MxJames]

VRM MOS ?

 

[MxJames]

OK VRM MOS 100 deg after 1 min 30 in aida64 at stock .......

 

[Journey]

OK VRM MOS 100 deg after 1 min 30 in aida64 at stock .......

Yes that is the one, VR MOS, you want to be no higher than 80c for sustained load. Eventually you'll either end up with a dead board, dead CPU, or both.

 

[MxJames]

yea not up for that lol Could you recomend any better heat pads than the ones they prob come with? if im gonna pull the coolers off i might aswell try everything

 

[orbitalwalsh]

Avoid Prime !
As a be 9700k causes a lot of heat , but specially with those two tests !!!

Using Gaming tests , or Cinebench to see how the VRMs perform

Better heatpads will help and airflow*sorry, looking after 3 Ill kids and wife to hands full

 

[MxJames]

all good man, glad to have got to the bottom. no real problem was just bugging me as to what tf was happening

 

[MxJames]

105 deg cinebench 2 mins

 

[Jay85]

Throttles at 110 i believe, if you're testing for stability try putting a small 40mm fan over the vrm heatsink. That dropped my vrm temps during testing down by 12c, enough to perform stability tests.

 

[MxJames]

cheers now i know problem i can address. ordered some grizzly thermal pad 8 and will see what i can do about other cooling also

 

[Journey]

105 deg cinebench 2 mins

Yes, this is normal for the Gaming 3 it was designed for lower power draw, and had a badly implemented VRM cooling solution. There are plenty of decent pads you can buy, I keep a stock of the Thermalright Thermal Pad which is rated for 12.8 W/mK.