NUC8i7HVK - No Undervolting Enabled

[PLust]

I recently bought NUC8i7HVK and the CPU runs really hot.

I've disabled Turbo Boost for now but this is no solution in the longer term.

My Question: Why aren't we allowed to undervolt CPU Vcore?

Can you please fix this with a bios update?

[PLust1]

I have the same problem, really want to set the vcore voltage offset to minus but lowest i can go is 0.

Really need to undervolt my unit since the cpu reaches 100 degrees celsius.

So it would be nice to enable vcore voltage offset with the next bios update.

[Ray_W_Intel]

So what you are asking for is a negative offset voltage?

You could set a static VID to the processor and then drop your Turbo Boost Power Max and Turbo Boost Short Power Max values from 65/65 down to 45/55 or something more realistic but asking for a negative offset isn't something that would be easy to validate as you would likely run into stability issues fairly quickly.

[PLust]

Yes, i want to be able to set negative offset voltage.

I've owned other NUC Units before and it was always possible to go down like -0.100 - -0.150 vcore offset.

This resulted in 5-10 degrees lower temps.

So please Intel patch this...

[MLevi]

If the normal operating temps are near 100 degrees C, then I recommend you return your unit for a replacement.

It should NOT operate at that temperature normally. The HVKs I've seen testing the overclocking reach those temps, but not normal, daily activity.

People are returning the units for replacement - you can search on this blog and others. It may be caused by the thermal transfer performance characteristics of the "Thermal Paste" material used. I've completely disassembled mine and replaced with an appropriate "slathering" of Grizzly. The enclosure was a pain until I watched this video: https://www.youtube.com/watch?v=-fiePyi6Xu0 Hades Canyon NUC Disassembly and Blowers-Cooling Solution - YouTube

When I disassembled the NUC (8i7HVK) and inspected the paste used by Intel, it was not fully covering the die. I wasn't getting any heat issues, but I wanted a different quality job on this to be "safe." I do this with ALL my computers because I do not want heat issues.

[idata]

Hello all,

Thank you for joining the Intel Community Support and for your feedback regarding this product. I would like to get some information about your systems. Please run the Intel® Processor Diagnostic Tool and attach the results so that we can review them and provide further details about this issue. Intel® Processor Diagnostic Tool https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-ToolI recommend you to reset your BIOS settings to default values. Wanner G.

[PLust1]

This topic is about a request to intel: Enable: Vcore Offset Voltage to be able to be set to a negative value.

Right now "0" is the lowest we can go for Vcore Offset Voltage.

With previous NUC's, for example NUC6i7KYK, it was possible to set the Vcore Offset Voltage to a negative value. For Example -0.100..

I could always lower the temperature of my CPU like 5-10 degrees with this.

[idata]

Hello all,

By reviewing system information we can determine if your processor is running very hot as it may vary depending on power management, BIOS settings, among others. I will do further research so that we can provide an answer regarding any future BIOS enhancements.In the meantime, I will review the information provided by MikeLevine to assist you as soon as possible. Wanner G.

[PLust]

Hello Intel,

My Bios Settings are all "Defauit" except for "Intel Turbo Boost", that i turned off, because off my CPU was reaching 100 degrees celsius all the time.

If you could allow us to set Vcore Voltage Offset to a negative value with the next Bios Update, me and many others would really appreciate it.

Since undervolting these high voltage mobile CPU's always helped a lot with temperatures in the past.

[Ray_W_Intel]

I posted this in another thread about temperatures but here it is in case you missed it on the other thread.

Try measuring temperatures with HWinfo64 and running prime95 with smallFFT workset and furmark at the same time. I know this seems counter-intuitive but the phase change thermal material between the CPU and heatsink may need a quick reconditioning and given that the cpu and gpu share the same heatsink this would at the very least be a good point of data for sure.

The idea is to run the prime95 and furmark for about 5min total and then shut down both workloads.

The reason this might work or help point out an issue with your units is that some general workloads are not enough to cause the TIM to change phase and flow, if you run the above workload for 5min maximum and then give the system time to come back down to normal temp this should isolate any TIM issue.

Keep in mind this won't need to be done every time you reload the system, should be a 1 time thing for reflowing the TIM.

I know you are looking to undervolt the cpu voltage and we are going to investigate if that is a possibility on this platform.

[PLust]

i already did prime95 + furmark for 30min.. temperatures are the same..

but now my nuc is making sounds like a water boiler... even at idle..

[idata]

Hello Dongerdinger,

Are you able to attach any information about those results?Wanner G.

[MLevi]

Wanner G.

Had another fail. Odd.

Followed testing regimen without adding HWiNFO64 to the mix.

[MLevi]

Follow-up Test, pass.

What's different?

Process

Right after the previous fail tonight, I shut down the NUC and rebooted five minutes later.

Using the established four minutes settling down period, ran IPDT again (v.1.0.27.W.MP). Attached pass file.

[PLust]

please just give us the possiblity to set Vcore Voltage Offset to a negative value.

if you could add this within the next bios update..

[MLevi]

Dongerdinger

I do appreciate you starting this thread, originally about the lack of settings for Vcore Voltage Offset to a negative value.

It's a fix that I know works.

But it doesn't address the overall thermal transfer/cooling engineering design of this model causing throttling and in a lot of cases thermal failures during testing.

I think something is wrong and support your request to change BIOS and add the VCore Voltage negative Offset, as an immediate work-around.

Its clear that the Intel team are investigating the problem. They need data from as many people as possible, in order to have the kind of data to analyze and make the right change to BIOS that you requested.

The NUC i have doesn't have many of the symptoms you've reported on yours. It does fail the IPDT test occasionally.

It would be great to see your test results, if anything for comparison purposes.

Mike

[PLust]

You mean this .txt file from IPDT?

Note: My current Turbost Boost is 3.9GHZ for Single and Multi, otherwise my CPU thermal Throttles all the time.

[PLust]

Hello Intel,

Any news for us?

[WZz]

Yes please give us the undervolt functions. I think it's quite possible because I saw someone unvervolted his kaby lake-g on his laptop (a Hp x360 I think)。 I think it's even better than overclock function.

[PLust1]

I heard that Vega is a really good undervolter too!

So it would be nice to get that Option in the Radeon RX Vega Software Settings aswell!

[PLust1]

I was wondering if we could get any answer if there will come a bios update for negative vcore voltage offset, otherwise i would return my unit.

Thanks.