[SOLVED] i9 9900k high idle temp

[conordart]

Hello everyone.

I have finished building my new computer and I feel my CPU is running to hot.

my specs are
i9 9900k stock
vcore fluctuates from 1.048 to 1.199 V
asus rog maximus hero XI
Corsair H115i AIO
coolermaster master 5 case.

My ambient temperature is 27.8C

While my pc is idling I am getting 40-46C on HWMonitor and under load from prime95 v26.6 running small FFTs, I am getting 93C after 10mins of running.
Also i am currenly running all fans in the case and on the cooler in performance/extreme mode.

Is this normal or should I be worried? whats a safe temperature to run at under load and while idling?

I have tested with bf5 and it stays around 65-70C from the Dual intelligent processors 5 program.

Thank you!

 

[Memphisto]

Hey there conordart!

I dont have a 9900k myself, but i heard, that those are a bit toasty...
Best check out the article from tomshardware here:
https://www.tomshardware.com/reviews/intel-core-i9-9900k-9th-gen-cpu,5847-12.html

tho you could still go in and check again that your cooler is sitting properly...
which thermal paste did you use?

Greetz
Memphisto

 

[smorizio]

some people have found with the new cpu the top lid of the cpu is not flat so that most coolers are not tuching the full top of the cpu. jaytwocents on his youtube had one of those chips. he found out that if you try and spin the cpu chip it wont spin. he sanded down the top of the lid of the cpu a bit and his temps went down as the air cooler had more contact with the cpu chip.

 

[vMax]

No you should just not be getting those temps at idle...at worst mid 30's degrees C and your cooler is more than okay. I would definitely re-install the H115i to double make sure that is not the issue with new thermal paste..Also check to make sure the pump is working properly as you should be able to read the pump speed on HW Info....

 

[The Original Ralph]

some people have found with the new cpu the top lid of the cpu is not flat so that most coolers are not tuching the full top of the cpu. jaytwocents on his youtube had one of those chips. he found out that if you try and spin the cpu chip it wont spin. he sanded down the top of the lid of the cpu a bit and his temps went down as the air cooler had more contact with the cpu chip.

got a link to that video - i've search youtube twice now and can't find it

tks

 

[The Original Ralph]

Hello everyone.

I have finished building my new computer and I feel my CPU is running to hot.

my specs are
i9 9900k stock
vcore fluctuates from 1.048 to 1.199 V
asus rog maximus hero XI
Corsair H115i AIO
coolermaster master 5 case.

My ambient temperature is 27.8C

While my pc is idling I am getting 40-46C on HWMonitor and under load from prime95 v26.6 running small FFTs, I am getting 93C after 10mins of running.
Also i am currenly running all fans in the case and on the cooler in performance/extreme mode.

Is this normal or should I be worried? whats a safe temperature to run at under load and while idling?

I have tested with bf5 and it stays around 65-70C from the Dual intelligent processors 5 program.

Thank you!

i'm getting close to assembling my i9-9900k setup hopefully this afternoon, but from every report i've read about temps
i'll be happy to see those temps - 93 in Prime95, cpu load should have been 100%, and according to Tom's review they measured the cpu drawing 200 watts - i just read the damn review this morning and now can't find it. Can your water pump be turned up to help those idle temps come down some?

but they ran in upper 50s (58 iirc) under stress testing using a water chiller in their cooling system (chilled the water to 20C)

what's your cpu load showing when running BF5?

fwiw

 

[conordart]

some people have found with the new cpu the top lid of the cpu is not flat so that most coolers are not tuching the full top of the cpu. jaytwocents on his youtube had one of those chips. he found out that if you try and spin the cpu chip it wont spin. he sanded down the top of the lid of the cpu a bit and his temps went down as the air cooler had more contact with the cpu chip.

Shot bru, Im looking to get some thermal paste, I just have to wait a few days to get a quality paste, I wont buy a cheapy.
Then Ill check if its level too and report back so we can all learn from this too.

 

[The Original Ralph]

what thermal paste did you order? i was going to suggest the Thermal Grizzly Kyronaut https://www.tomshardware.com/reviews/thermal-paste-comparison,5108-8.html

just pulled my 9900k back off the motherboard (hadn't installed the cooler yet) and put a straightedge across it. Mine's showing it's concave (ie dished out) with the gap, eyeballing it, looks like maybe 001" to.002" (2 thousandths) . That may be distortion from the solder - it would have stayed hot there while the edges of the IHS cooled first and they would have curled upward some. I recall my earlier noctua heatsink was convex by a few thousandths and back then i assumed noctua planned for the heatsink to push into the IHS, moreso in the center, and over some usage the IHS would conform to the heatsink, each time it heated it would soften some

i'm going to leave my IHS alone and see what temps i get

 

[conordart]

what thermal paste did you order? i was going to suggest the Thermal Grizzly Kyronaut https://www.tomshardware.com/reviews/thermal-paste-comparison,5108-8.html

just pulled my 9900k back off the motherboard (hadn't installed the cooler yet) and put a straightedge across it. Mine's showing it's concave (ie dished out) with the gap, eyeballing it, looks like maybe 001" to.002" (2 thousandths) . That may be distortion from the solder - it would have stayed hot there while the edges of the IHS cooled first and they would have curled upward some. I recall my earlier noctua heatsink was convex by a few thousandths and back then i assumed noctua planned for the heatsink to push into the IHS, moreso in the center, and over some usage the IHS would conform to the heatsink, each time it heated it would soften some

i'm going to leave my IHS alone and see what temps i get

I was just testing now and Im getting about 60% at 2k rez and on a 1080ti with BF 5

Also I got Deepcool Z3 High Performance Thermal Paste as I'm from South Africa and to get anything really i have to wait a few days, so i thought id get that and see if that will help.

Any idea if that z3 is any good I guess it cant be worse then if i did seat the pump correctly? I was thinking of getting Cooler Master Mastergel Maker Nano, do you rate it will be way better? otherwise I'll apply the z3 tomorrow when it arrives and then order the mastergel, which will come next week I rate.

 

[vMax]

what thermal paste did you order? i was going to suggest the Thermal Grizzly Kyronaut https://www.tomshardware.com/reviews/thermal-paste-comparison,5108-8.html

just pulled my 9900k back off the motherboard (hadn't installed the cooler yet) and put a straightedge across it. Mine's showing it's concave (ie dished out) with the gap, eyeballing it, looks like maybe 001" to.002" (2 thousandths) . That may be distortion from the solder - it would have stayed hot there while the edges of the IHS cooled first and they would have curled upward some. I recall my earlier noctua heatsink was convex by a few thousandths and back then i assumed noctua planned for the heatsink to push into the IHS, moreso in the center, and over some usage the IHS would conform to the heatsink, each time it heated it would soften some

i'm going to leave my IHS alone and see what temps i get

I was just testing now and Im getting about 60% at 2k rez and on a 1080ti with BF 5

Also I got Deepcool Z3 High Performance Thermal Paste as I'm from South Africa and to get anything really i have to wait a few days, so i thought id get that and see if that will help.

Any idea if that z3 is any good I guess it cant be worse then if i did seat the pump correctly? I was thinking of getting Cooler Master Mastergel Maker Nano, do you rate it will be way better? otherwise I'll apply the z3 tomorrow when it arrives and then order the mastergel, which will come next week I rate.

I presume you mean 60 degrees rather than 60%? which is more than okay. As to the thermal paste, I don't know the Deepcool one..should be okay but the Cooler Master MasterGel Maker is very good not the Nano but the Master Gel Maker and on power With Thermal Grizzly Kryonaut, Noctua NT-H1 and the Gelid GC extreme....all are great..

 

[conordart]

what thermal paste did you order? i was going to suggest the Thermal Grizzly Kyronaut https://www.tomshardware.com/reviews/thermal-paste-comparison,5108-8.html

just pulled my 9900k back off the motherboard (hadn't installed the cooler yet) and put a straightedge across it. Mine's showing it's concave (ie dished out) with the gap, eyeballing it, looks like maybe 001" to.002" (2 thousandths) . That may be distortion from the solder - it would have stayed hot there while the edges of the IHS cooled first and they would have curled upward some. I recall my earlier noctua heatsink was convex by a few thousandths and back then i assumed noctua planned for the heatsink to push into the IHS, moreso in the center, and over some usage the IHS would conform to the heatsink, each time it heated it would soften some

i'm going to leave my IHS alone and see what temps i get

I was just testing now and Im getting about 60% at 2k rez and on a 1080ti with BF 5

Also I got Deepcool Z3 High Performance Thermal Paste as I'm from South Africa and to get anything really i have to wait a few days, so i thought id get that and see if that will help.

Any idea if that z3 is any good I guess it cant be worse then if i did seat the pump correctly? I was thinking of getting Cooler Master Mastergel Maker Nano, do you rate it will be way better? otherwise I'll apply the z3 tomorrow when it arrives and then order the mastergel, which will come next week I rate.

I presume you mean 60 degrees rather than 60%? which is more than okay. As to the thermal paste, I don't know the Deepcool one..should be okay but the Cooler Master MasterGel Maker is very good not the Nano but the Master Gel Maker and on power With Thermal Grizzly Kryonaut, Noctua NT-H1 and the Gelid GC extreme....all are great..

I did mean 60% usage of the cpu,at around 70-75C which i rate is definitely to high. i'l try see if I can source a better paste for sure. I will update once I have applied the z3 thermal paste tomorrow.

 

[The Original Ralph]

I was just testing now and Im getting about 60% at 2k rez and on a 1080ti with BF 5

Also I got Deepcool Z3 High Performance Thermal Paste as I'm from South Africa and to get anything really i have to wait a few days, so i thought id get that and see if that will help.

Any idea if that z3 is any good I guess it cant be worse then if i did seat the pump correctly? I was thinking of getting Cooler Master Mastergel Maker Nano, do you rate it will be way better? otherwise I'll apply the z3 tomorrow when it arrives and then order the mastergel, which will come next week I rate.

hit that link i posted, it;s a chart of thermal paste comparisons, and i don't see your Deepcool listed so can't offer an opinion - Coolaboratory and Thermal Grizzly Kyronaut are up near the top - i'd stay away from the Thermal Conductnaut as it seems to etch the IHS on the CPU, same with the Coolaboratory - they're both liquid metal and don't play nice with aluminum and i'd assume they etch the IHS same as the Thermal Conductnaut

65-70C at 60% load on the 9900k isn't that bad, i'd be able to live with it, but suspect you're going to be able to dial it down some, playing with thermal pastes etc. You might also want to make sure you've got more air blowing into the computer case than out, ie you don't want negative pressure in the case - keep in mind your radiator fan is throwing air out, if you have a GPU, most exhaust air out of the case, and if you've got a regular exhaust fan throwing air out, then you've got negative air pressure. With that water cooler, i'd think you could turn that rear exhaust fan so it's feeding air into the case

read what i said about my 9900k being concave on it's top side, ie the IHS - next time you have your cooler off find a straight edge and hold it across both your CPU with a flash light behind it and do the same with the bottom side of the heatsink - if it's convex, i'd leave them alone and see if temps don't come down some more over time
and in case, concave = like the inside of a bowl, convex = like the outside of that bowl

here's a shot of my 9900k with a straightedge across it - use a thin straightedge as a thick one, like a ruler or whatever, will make it harder to see the full depth of the gap

 

[The Original Ralph]

something else i saw on one of the videos on youtube that might help - they were evaluating an alphacool water cooler, and tried mounting it two ways, first way was so the logo was north to south and the 2nd way, basically turning it so the logo read from west to east.

Reason, under the IHS, the actual die on the cpu is a soldered block that is about the configuration of a dollar bill - if your heatsink has a similiar config, it can effect how fast it can absorb heat.

you might try it both ways - i don't think it's going to drop temps 10C but it can drop them 2 or even 3C

fwiw

 

[theruan]

Yes, you should be worried, this water cooling system isn't even close enough for this cpu, before changing thermal paste you should just find a way to measure the temps in the radiator, if it's going high then you have one of this:
radiator is installed inside and the air going out is too hot, maybe due to graphics card?!
If this is the case you can try to move to the top if you can, move outside or mount a stronger cooler or a double cooler on top of the radiator.

Or again as I said earlier, this isn't good for this cpu, this cpu has a base 95w tdp, but it can go easily to around 200w in turbo.
95w means around 1ºC/s for 20~30 ml of cooling liquid, this cooling system doesn't have much liquid and doesn't have where to store the heat, therefore it will easily reach max temp.
In other words, without using turbo and without the radiator fan being on, it should reach about > 80ºC after (80ºC - 27ºC) 63*3(as u likely have about 100ml of liquid in there) = 189s.
Considering that the cooler isn't bad it will ofc drop the heat, but not even close to what is needed.

For CPUs that have a TDP that goes often above 100w a reservoir is very much needed, another radiator wouldn't be a bad idea either, and if possible an external radiator, not internal, as internal temps can easily go at least 5~10ºC above room temp.

 

[conordart]

Alright so here's an update, I reapplied the thermal paste, and the temps aren't from 40-46 anymore they its saying around 40C now.

I did check that icue says my temp is 36C so I'm not really sure who to believe.

So tomorrow I'm going to pickup some better thermal paste and update my case to the coolermaster h500p because I feel my case isn't getting the best airflow it can get.

I have been advised that I am wasting my money if i get the h150i as my h115 will do the trick fine.

So I will update after I apply the new thermal paste, I can only get the cooler Master Mastergel Maker Nano thermal paste for now, as the rest I need to import, and I feel my case is one of the issues.

Is the cooler Master Mastergel Maker Nano not good?

 

[theruan]

Alright so here's an update, I reapplied the thermal paste, and the temps aren't from 40-46 anymore they its saying around 40C now.

I did check that icue says my temp is 36C so I'm not really sure who to believe.

So tomorrow I'm going to pickup some better thermal paste and update my case to the coolermaster h500p because I feel my case isn't getting the best airflow it can get.

I have been advised that I am wasting my money if i get the h150i as my h115 will do the trick fine.

So I will update after I apply the new thermal paste, I can only get the cooler Master Mastergel Maker Nano thermal paste for now, as the rest I need to import, and I feel my case is one of the issues.

Is the cooler Master Mastergel Maker Nano not good?

I'm not sure, but I think the icue isn't reporting core temp, which is your main concern.

Also the idle temperature should never be your base to know if the system is ok or not, as idle usually generates very little heat, something around 1/3 or less of normal TDP.

 

[conordart]

I ended up getting a few ml140 corsair fans that go 2000rpm,and they have brought the temperature down to around 34-37C with an ambient temp of around 28-30C now.

I also noticed i messed up the fan config before and all fans where blowing out the case, so now I have proper airflow thats helping alot.

In prime95 I am getting 72C on full load and BF5 I'm getting around 65C so I feel like those temps are definitely better then before.

I also reapplied a better thermal paste too.

Thanks for all your advice everyone I appreciate it.

 

[smorizio]

https://www.youtube.com/watch?v=EALCvMxvLyA

 

[The Original Ralph]

pulled the same straight edge across my heatsink, and same as the last noctua, it's convex (so it ought to fit right into the concave IHS i pictured above. Maybe not perfectly, but i'd rather go with it like that than sand either the IHS or the heatsink

 

[The Original Ralph]

assembled my rig this afternoon, using Thermal Grizzly Kyronaut with the Noctua NH-D15S, i was able to hit 4.9MHz across all 8 cores with temps in the mid to high 80Cs at 1.225 cpu Vcore running Prime95 vs 26.2 small FFTs and that was a fast "tweaking" job

suspect i'll hit 5.0 tomorrow but Prime95 is not the real test - my video rendering will, i suspect, show even better temps, which is where i'm really focused

fwiw