i9 9900k running hot after OC

[gxdofsiege6]

So i recently OCed my i9 9900k to 5ghz. Im using an MSI Z390 MEG ACE board and a corsair h150i to cool it. I followed MSI's instructions on how to OC the 9900k and tweaked all the bios settings they suggested. I have it set to 1.32v and when I run cinebench it reaches to the low 90s and I get a score of around low 2000s (dont know if thats normal considering most scores i seen were around the 2100 mark). The fans that are mounted to my radiator are the stock corsair sp fans that came with the corsair crystal 570x and my 3 exhaust fans are the corsair fans that came with the water cooler. What should I do to lower these temps? Should I buy a certain type of case fans? Any suggestions will help.

 

[MeanMachine41]

Changing fans to ML fans will make for a quieter system but not much by way of heat dissipation and best is to change your fan curve in Bios or add additional case fans.
That being said, at 5GHz yes the i9-9900k does run hot. You may be able to reduce your Core Voltage (that would help) and some have managed to set Core Voltage to 1.28V at 5.0GHz and stable. Much depends on the sample you have (Silicone Lottery)

I find it better to have the air passing thru the Radiator from outside to inside especially if you have a none reference GPU. Remember that air inside a case is never lower than ambient room temp. Makes a huge difference if your air conditioned.

 

[The Original Ralph]

i've got the same CPU and motherboard - love the board btw, especially after going thru one Asrock Taichi and two Gigabyte boards.

What MM41 said about ambient temp - we keep the house at 72F (22C) - i'm at 4.9 with a 1.245 Vcore. Rendering videos (the main program i use keeps the CPU at 96-99% load, and my temps are usually in the low to high 70Cs. The wife unit turned the heat up to 74F today while i was rendering, and five minutes later the alarm on my monitoring program sounded intermittently - one core was hitting 85C - just 2 degrees Farenheit did that.

Something else to keep in mind - you should have more fans blowing air into the case, than exhausting - and your GPU is exhausting air in addition to the 3 radiator fans. With more fans exhausting than blowing air in, you've got negative air pressure which means the radiator fans are working harder and still delivering less air thru the radiator. An easy way to see if that's an issue would be to take the case cover off.

DarkBreeze put up a pretty decent guide to OCing with some tips on adjusting or tweaking Vcore - that 1.32V may be the Vcore you need to run stable, but i'd try DarkBreeze's tips to bring it down - the lower you can bring it down, the lower the temps. Link below to DarkBreeze's OC guide

http://www.tomshardware.com/faq/id-3761568/beginners-guide-overclocking-cpu-explicit-testing-guidelines.html

Those stress tests are nice exercises to prove your system stable at whatever settings, but don't live for stress testing - what kind of temps are you seeing when you're doing whatever, ie gaming etc?

When i get liquid cooling set up, i plan to turn the case's normal exhaust fan around to blow air into the case, and fabricate an acrylic shroud to aim the air down at the VRM heatsinks. just an idea

 

[devbiker]

The stock fans with the H150i PRO are ML fans - just the quiet edition, so lower RPMs than the stand-alone ML (non-RGB) fans that you can purchase. The SP-RGB fans cannot be controlled from the cooler - they'll run at full blast all the time. This is fine if you don't mind the noise but they won't really perform any better than the stock ML fans with the cooler.

As MeanMachine41 said, changing the fans isn't likely to make much, if any difference but that's impossible to say right now as you didn't include the temp of the H150i coolant.

 

[gxdofsiege6]

Changing fans to ML fans will make for a quieter system but not much by way of heat dissipation and best is to change your fan curve in Bios or add additional case fans.
That being said, at 5GHz yes the i9-9900k does run hot. You may be able to reduce your Core Voltage (that would help) and some have managed to set Core Voltage to 1.28V at 5.0GHz and stable. Much depends on the sample you have (Silicone Lottery)

I find it better to have the air passing thru the Radiator from outside to inside especially if you have a none reference GPU. Remember that air inside a case is never lower than ambient room temp. Makes a huge difference if your air conditioned.

Yes I managed to lower my core voltage to 1.28 and its stable. And I ran a test and it was in the low 70s which is pretty good. And If u had to give me good advice for case fans what should I buy/replace? Should I replace my fans on the radiator or my exhaust ml fans? I dont care about aesthetics just whatever is the best fans.

 

[gxdofsiege6]

i've got the same CPU and motherboard - love the board btw, especially after going thru one Asrock Taichi and two Gigabyte boards.

What MM41 said about ambient temp - we keep the house at 72F (22C) - i'm at 4.9 with a 1.245 Vcore. Rendering videos (the main program i use keeps the CPU at 96-99% load, and my temps are usually in the low to high 70Cs. The wife unit turned the heat up to 74F today while i was rendering, and five minutes later the alarm on my monitoring program sounded intermittently - one core was hitting 85C - just 2 degrees Farenheit did that.

Something else to keep in mind - you should have more fans blowing air into the case, than exhausting - and your GPU is exhausting air in addition to the 3 radiator fans. With more fans exhausting than blowing air in, you've got negative air pressure which means the radiator fans are working harder and still delivering less air thru the radiator. An easy way to see if that's an issue would be to take the case cover off.

DarkBreeze put up a pretty decent guide to OCing with some tips on adjusting or tweaking Vcore - that 1.32V may be the Vcore you need to run stable, but i'd try DarkBreeze's tips to bring it down - the lower you can bring it down, the lower the temps. Link below to DarkBreeze's OC guide

http://www.tomshardware.com/faq/id-3761568/beginners-guide-overclocking-cpu-explicit-testing-guidelines.html

Those stress tests are nice exercises to prove your system stable at whatever settings, but don't live for stress testing - what kind of temps are you seeing when you're doing whatever, ie gaming etc?

When i get liquid cooling set up, i plan to turn the case's normal exhaust fan around to blow air into the case, and fabricate an acrylic shroud to aim the air down at the VRM heatsinks. just an idea

Thanks for the info! I will definitely check out that link.

 

[gxdofsiege6]

The stock fans with the H150i PRO are ML fans - just the quiet edition, so lower RPMs than the stand-alone ML (non-RGB) fans that you can purchase. The SP-RGB fans cannot be controlled from the cooler - they'll run at full blast all the time. This is fine if you don't mind the noise but they won't really perform any better than the stock ML fans with the cooler.

As MeanMachine41 said, changing the fans isn't likely to make much, if any difference but that's impossible to say right now as you didn't include the temp of the H150i coolant.

Ok makes sense. I dont know much about case fans and which ones are the best and what not but as long as my temps are not close to thermal throttling im fine which it seems like my temps are fine now (running low 70s after cinebench test)

 

[stefan.marwede]

Hi, I Have the 9900K on a ASRock Phantom Gaming 9 board with the new Chipset 390 on 4.9GHZ on all Cores at the same time with the Noctua NH-D15 cooler Stable on Prime @ 70 - 80° an on Cinebench @ 90 - 95°. The V-Core is between 0.850V and 1.280V. I Think this are good results

Let me now what is you're setup.