[SOLVED] 10850K high core temps

[Nighthawk117]

Hi guys,

I recently swapped a Gigabyte Z490 Vision G motherboard for an MSI Mag Z490 Tomahawk due to stability issues. One thing I've noticed is that core temps seem to be higher than what they were, previously my core temps were always below 70C and in the mid to high 60's, but now they are significantly higher.

My temps are:

https://imgur.com/EbvdHwB

View: https://imgur.com/EbvdHwB


I run my 10850K at 4.5Ghz not 4.8Ghz because it runs very hot at 4.8 on a 240mm AIO. Please note I have the multiplier set to 45 and turbo boost is disabled, this is the configuration I used on previous board. There seems to be a much bigger variation between package and core temp this time of up to 10C. The only things that have changed are the board and I'm using Artic MX-5 thermal paste instead of Noctua NT-H1. I've tried a re-paste just in case of poor application but it made no difference. The package poor draw is no higher than it was before. Any thoughts on why the temps may have changed?

My specs are below:

Cpu: Core i9 10850K @ 4.5Ghz
Cooler: Asus Strix LC 240mm
Motherboard: MSI Mag Z490 Tomahawk
Ram: 32GB Corsair Vengeance 3000mhz
GPU: Palit Nvidia 3080
SSD: 2 x 1TB nvme, 2 x 500GB sata
HDD: 2 x 4TB
PSU: Seasonic Focus GX Gold 1000W
Case: Meshify C

Thanks

 

[Deleted member 362816]

I assume this motherboard may be pushing more voltage resulting in the higher temps.

 

[Nighthawk117]

That was my thoughts as well but VID for the cores looks no higher than before and package power is actually slightly lower. Any experience with boards reporting different temps?

 

[uWebb429]

HWMonitor is not reporting your CPU package or core temperatures correctly. Not sure which ones are wrong. The CPU package temperature includes data from all of the individual core sensors. It is impossible for the individual cores to be at 41°C and the package to only be at 31°C. Use HWiNFO instead.

Many Z490 motherboards at default settings are sending too much voltage to the CPU. This is especially a problem for the 10850K. Intel deliberately added more voltage to these CPUs so they could run reliably. A 10850K has a high voltage table built into it because it was not good enough to be a 10900K.

Reduce the voltage in the BIOS and you can significantly reduce your full load CPU temperatures. A negative offset of -50 mV to -100 mV is usually 100% stable. At 4.8 GHz all core and fully loaded with Cinebench, the heat is easy to manage with an AIO cooler. Run HWiNFO to see what it reports for VCore voltage during this test.

No need to slow your 10850K down. Just lower its voltage.

Your idle power consumption looks high. If you want to lower this, make sure the core and package C states are enabled in the BIOS. The 10850K can be very efficient when idle, even when running at 5000 MHz.

 

[Nighthawk117]

Hi guys, thanks for you advice. uWebb429 I think you've solved it, I've downloaded HWiNFO and the latest version of HWMonitor, core temps look like I was expecting now on both of them, so maybe older version had an issue with this board or something. Screenie below, I don't seem to have vcore listed on either of them. I think when I was in the bios it was around 1.26 or something like that. I'll check on the C-States I thought they were enabled, I deliberately played with the multiplier rather than the voltage because I didn't want to lose the power saving stuff and I don't know what I'm doing with negative voltage offsets.

https://imgur.com/2IIenHE

View: https://imgur.com/2IIenHE


Thanks

 

[uWebb429]

I don't seem to have vcore listed

The VCCIO and VCCSA (system agent) voltages are OK. The Core VID voltage is not important.

Vcore voltage is listed in your screenshot.

If you run your CPU at an all core speed of 4.8 GHz, you will probably see the VCore over 1.30 V which is usually 0.10 V more than what it needs to be stable. Excessive voltage is what causes unnecessary heat.

Run something simple and consistent like Cinebench R20 or R23. It is best to monitor the CPU voltage when the CPU is loaded and running at a steady speed.

https://www.techpowerup.com/download/maxon-cinebench/

If you ever want to lower your voltage instead of your CPU speed, here is how to set a -0.075V voltage offset when using an Asus BIOS. Your motherboard likely has a similar setting.

 

[Nighthawk117]

The VCCIO and VCCSA (system agent) voltages are OK. The Core VID voltage is not important.

Vcore voltage is listed in your screenshot.

If you run your CPU at an all core speed of 4.8 GHz, you will probably see the VCore over 1.30 V which is usually 0.10 V more than what it needs to be stable. Excessive voltage is what causes unnecessary heat.

Run something simple and consistent like Cinebench R20 or R23. It is best to monitor the CPU voltage when the CPU is loaded and running at a steady speed.

https://www.techpowerup.com/download/maxon-cinebench/

If you ever want to lower your voltage instead of your CPU speed, here is how to set a -0.075V voltage offset when using an Asus BIOS. Your motherboard likely has a similar setting.

So it is, I completely missed that :/, I did go into the bios and it stated 1.208v. It defaulted to 4.8Ghz with power limits removed when I first installed it, the vcore was indeed over 1.3v on both boards. I'm not an overclocker I've always run my cpu's at stock so I have very limited knowledge in this area. If I specified a negative offset would I need to change anything else? Would I need to play with load line calibration or anything like that because I don't really understand the other bits? Re Cinebench I have R23 installed, I used that to test cpu after installing it.

Thanks

 

[uWebb429]

If I specified a negative offset would I need to change anything else?

Usually not. Start conservatively. Try setting a negative offset of -0.050 V. Run Cinebench at 4.8 GHz and compare temps and Vcore voltage to what you were getting previously with no offset.

I have never used a Z490 Gigabyte or MSI motherboard so you will need to experiment if you want to pursue this. Your temperatures are fine as is. Most people worry too much about CPU temperatures when there is really no reason to. Intel sets the thermal throttling temperature to 100°C because they know their CPUs can run reliably at this temperature.

I put this to the test and found out that Intel is right. Their CPUs really can run at 100°C.
Not that I recommend doing this every day but it is nice to know. Temperatures of 70°C, 80°C or 90°C are all within spec. Limiting your CPU to 4.5 GHz is really not necessary.

 

[Nighthawk117]

Thanks for the info, I might have a play around with this and see what mileage I get. Your first screen shot with it at 4.8Ghz is interesting at 1.172v. Can I ask what voltage offset you used for that? Also what cooler do you use?

https://imgur.com/70gfbmj

View: https://i.imgur.com/70gfbmj.png


Thanks

 

[uWebb429]

Can I ask what voltage offset you used for that?

I can honestly say that I am not sure. That picture was taken a long time ago.

How much offset voltage you should use depends on your load line calibration settings. Every motherboard is unique so it is always best to find out what works for your motherboard.

At the moment I am using zero offset voltage. I adjusted my load line settings instead. This gives the CPU 1.190 V for Vcore voltage when running Cinebench R20.

Enabling the C states reduces the minimum voltage to next to nothing when idle. When a core enters the C7 C state, it is at 0 volts because it is disconnected from the voltage rail.

 

[Nighthawk117]

Ah ok that's interesting, I'll look into it. C-States were set to Auto in the bios, I've changed them to enabled, my min package power is 9W's according to HWMonitor, that seems fairly low to me. It might go lower perhaps, but I have a couple of background tasks running at the moment, I guess they might keep the cpu awake.

Thanks for taking the time to respond, you've been very helpful