Incorrect BCLK frequency on Intel platforms

Aleq · Post by **Aleq** » Tue Oct 19, 2021 2:18 pm

Hi,
can you please check what is wrong with the frequency display on Intel Tigerlake? I'm getting numbers like 22 MHz etc

Screenshot
https://ctrlv.cz/3vuq

Thanks,
A.

Post by **The Coolest** » Tue Oct 19, 2021 9:36 pm

Please post a register dump. In Tools menu.

KamikazeXeX · Post by **KamikazeXeX** » Fri Nov 05, 2021 4:51 pm

Hiya,

I'm experiencing some issues with Core Temp since upgrading to Windows 11, for some odd reason the BCLK frequency is registering as 6x higher (600 as opposed to 100) than it should be, everything else appears to be working as expected.

CoreTemp.png

I've provided a register dump in the attachments.

Thanks in advance.

jab8356 · Post by **jab8356** » Thu Dec 30, 2021 1:49 pm

I have attached a screenshot and dump file.

Post by **The Coolest** » Thu Dec 30, 2021 4:39 pm

Hi,
Is this consistent if you refresh/restart Core Temp? Or does the bus frequency always change?

jab8356 · Post by **jab8356** » Thu Dec 30, 2021 5:17 pm

After refresh and restart, the frequency stays the same as the screenshot.

HDCL · Post by **HDCL** » Mon Jan 03, 2022 10:23 pm

I just built a new PC with an Intel 12700K and Asus motherboard. Core Temp was working correctly but when I enabled Hyper-V and during some Bios setting adjustments, now the BCLK value shows 9.77 Mhz instead of 100Mhz and so the reported frequency is wrong - 469 MHz instead of 4700 MHz.

Also, Core Temp reports this CPU as having 12 cores and 24 threads when it has only 20 threads. The 8 performance cores are hyper threaded (16 threads) + 4 efficiency cores.

The built in Asus AI Tweak utility is correctly reporting the actual frequency.

See attached for screenshots. The CPU is under a Cinebench R23 run, hence the high power draw and temps.

Post by **The Coolest** » Tue Jan 04, 2022 4:24 pm

Please post a register dump, Tools -> Register dump.

HDCL · Post by **HDCL** » Tue Jan 04, 2022 6:05 pm

After one sleep->resume cycle, now the BCLK is correct. The next time this happens, I will post the registry dump file. This seems to happen after a full reboot.

Post by **The Coolest** » Tue Jan 04, 2022 6:28 pm

The dump file will be useful for me to understand why the thread count is incorrect.

HDCL · Post by **HDCL** » Tue Jan 04, 2022 7:02 pm

File attached. Interesting that the dump file shows the correct core/thread count but the UI does not reflect it (still shows 12 cores/24 threads)

HDCL · Post by **HDCL** » Tue Jan 04, 2022 9:12 pm

Just rebooted - BCLK is wrong now again. New Dump file attached

HDCL · Post by **HDCL** » Wed Jan 05, 2022 4:04 pm

And after a single sleep->resume cycle, the BCLK is now correct again.

So to reproduce, I have to reboot once. To fix it, reboot and then sleep->resume.

KamikazeXeX · Post by **KamikazeXeX** » Sat Jan 29, 2022 3:07 pm

A quick update, after reading some of the other bug reports with similar sounding issues of bad BCLK reporting, after reading THIS thread, the same sleep & resume cycle "fixes" my frequency reporting issue too, the issue re-occurs after shutdown/restarts.

jab8356 · Post by **jab8356** » Mon Mar 14, 2022 10:16 pm

Just wondering if anything came of this?

Gabriel · Post by **Gabriel** » Tue Apr 26, 2022 1:08 pm

It's reading 99.63 when every other source shows 100. Core dump attached.

Gabriel · Post by **Gabriel** » Fri Apr 29, 2022 12:25 am

When set to 101 core temp gadget reads 100. I have used this set-up for years and really like it, I just wish it would read correctly with this 12600k cpu and x690 gaming x MB..
Hardware info reads correctly, it's just the gadget that reads wrong...

Gabriel · Post by **Gabriel** » Fri Apr 29, 2022 12:58 am

And???? What happened? Was this corrected?

mtosev · Post by **mtosev** » Thu May 12, 2022 11:59 am

Well, I think the screenshot shows what the issues are.

cpuzcoretemp.png

If any additional information is needed I'm happy to provide it.

Post by **The Coolest** » Thu May 12, 2022 8:43 pm

Does the frequency change if you press F5 (or restart the program)?
If not, please attach a register dump (Tools menu) and I'll take a look.

sonmi · Post by **sonmi** » Sat May 14, 2022 7:37 pm

Core Temp reports an incorrect frequency if and only if HVCI is enabled. Register dump attached.

Intel i7 11700
Gigabyte B560M D3H
32 GB DRAM dual channel
Sabrent 500 GB SSD
Corsair RM750 PSU

mtosev · Post by **mtosev** » Mon May 16, 2022 1:39 pm

The Coolest wrote: ↑Thu May 12, 2022 8:43 pm Does the frequency change if you press F5 (or restart the program)?
If not, please attach a register dump (Tools menu) and I'll take a look.

I rebooted the computer because Windows needed to install some updates and it stays the same. Pressing F5 didn't change anything as well.

ReneL · Post by **ReneL** » Tue May 24, 2022 4:06 pm

I have the same problem after the last BIOS update. The changelog of this update says: Update Intel Micro code for security vulnerabilities.

Screenshot 2022-05-24 175755.jpg

After pressing F5 or restart the application didn't change something.

ReneL · Post by **ReneL** » Tue May 24, 2022 4:11 pm

And this is after rebooting the machine: 30 GHz

KamikazeXeX · Post by **KamikazeXeX** » Sun Jun 12, 2022 2:49 pm

Another update to this situation, I reinstalled Windows 11 from fresh last night (my old OS had pre-existing issuses since my in-place upgrade from Windows 10 to 11 that I just never bothered solving).

After install, I installed:
Motherboard/GPU drivers
Development tools (VS2019 + Rider)
Regular RGB software.
All OS updates.

CoreTemp worked correctly over the multiple restarts, I booted the PC up today and it's once again reporting BCLK incorrectly (same issue as before, 6x higher).

I've tried uninstalling the software that was installed after CoreTemp and that's had no effect, I've added a new register dump in case there's anything new that could pinpoint the issue, additonally, the same Sleep->Resume cycle that remedied the issue before now results in wildly high BCLK frequency, I've also attached a screenshot of that.

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