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18 Posts

02-26-2021

Germany

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Legion T7 34IMZ5: i9 CPU max clock speed issue

2021-02-26, 19:01 PM

I just received my PC model 90Q8004JGE and I noticed since the first power on that the CPU speed does not exceed 4.1-4.3GHz. The info was obtained from Vantage and Task Manager.

 

Later I managed to run a test with Lenovo Diagnostics UEFI on a USB stick and I get a very strange reading of the CPU max speed: 4.300 GHz.

 

I have at home another Lenovo Legion PC that I was about to return after buying the higher specs model, almost the same configuration (32GB RAM, 1TB SSD, model 90Q8004HGE). The Lenovo Diagnostics UEFI reports the correct CPU max speed of 5.300 GHz.

 

For sure there is something wrong with the newest machine that shows a lower speed. What should I do? I attach some logs and screenshots I captured.

 

--------This is the problematic 90Q8004JGE, CPU_MAX_SPEED: 4.300 GHz

SERIAL_NUMBER: ********
BIOS_VERSION: O4LKT19A
MACHINE_MODEL: Legion T7 34IMZ5
APPLICATION_VERSION: Version 04.17.000

BEGIN_EXECUTION
+++ 20210226T095502UTC CPU EXTENDED DIAGNOSTIC 1614333302000
UDI: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz - INTEL
DISPLAYNAME: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz - INTEL
CPU_MODEL: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz
CPU_VENDOR: INTEL
CPU_CORES: 10
CPU_ENABLED_CORES: 10
CPU_THREADS: 20
CPU_SIGNATURE: a0655
CPU_MAX_SPEED: 4.300 GHz
CPU_CURRENT_SPEED: 3.696 GHz

 

--------This is the good 90Q8004HGE, CPU_MAX_SPEED: 5.300 GHz

SERIAL_NUMBER: ********
BIOS_VERSION: O4LKT19A
MACHINE_MODEL: Legion T7 34IMZ5
APPLICATION_VERSION: Version 04.17.000

BEGIN_EXECUTION
+++ 20210226T191550UTC CPU QUICK DIAGNOSTIC 1614366950000
UDI: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz - INTEL
DISPLAYNAME: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz - INTEL

CPU_MODEL: Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz
CPU_VENDOR: INTEL
CPU_CORES: 10
CPU_ENABLED_CORES: 10
CPU_THREADS: 20
CPU_SIGNATURE: a0655
CPU_MAX_SPEED: 5.300 GHz
CPU_CURRENT_SPEED: 3.696 GHz

 

Moderator note: serial numbers removed to prevent abuse.

 

 

 

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18 Posts

02-26-2021

Germany

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Re:Legion T7 34IMZ5: i9 CPU max clock speed issue

2021-03-05, 18:39 PM

I remember checking this: not exceeding 50-55 degrees, 0% CPU throttling.

 

Good news I found a fix in the meantime. The BIOS version the PC was delivered with was O4LKT19A, so the latest one. I re-flashed the BIOS with the same version but prior to that I disabled a specific setting that prevents flashing the current or an older version. After this the CPU is listed with max speed of 5.3 GHz instead of 4.3 GHz as per the initial screenshots.

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2568 Posts

04-23-2019

United States of America

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  • Message 2 of 22

Re:i9 CPU issue

2021-02-26, 20:08 PM

Hello @rosioara,

 

Welcome to the Community Forums.

 

I would recommend trying to update the BIOS if you haven't tried that already.

You can find the update here: https://pcsupport.lenovo.com/jp/en/products/desktops-and-all-in-ones/legion-series/legion-t7-34imz5/90q8/90q8004jge/s5000zk6/downloads/driver-list/component?name=BIOS%2FUEFI



Hope this helps.
Regards,
Jack_Lenovo1



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18 Posts

02-26-2021

Germany

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Re:i9 CPU issue

2021-02-26, 20:09 PM

BIOS already updated...

 

I am adding CPUID screenshots from Aida64 with the 'problematic' CPU vs 'normal' CPU. The first has the extra line 'Max Turbo Boost Multipliers' with values at around 41-43x...

 

 

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50 Posts

02-26-2021

United Kingdom of Great Britain and Northern Ireland

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  • Message 4 of 22

Re:Legion T7 34IMZ5 i9 CPU issue

2021-02-27, 8:05 AM

Have you changed the power setting from balanced to high performance ?

 

You need to sellect performance mode in vantage and high performance in the Windows setting menu under power settings

 

I have an i7 10700k and mine goes right up to 5.1ghz 

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18 Posts

02-26-2021

Germany

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Re:Legion T7 34IMZ5 i9 CPU issue

2021-02-27, 8:12 AM

Yes, I did that too. I am quite confident the 4.3 GHz limit is hardcoded (wrongly) in a way into this CPU as the Aida64 CPUID shows. The other identical CPU does not have the flags.

 

Also, the Lenovo Diagnostics UEFI tool runs outside Windows, you have to boot it from an USB stick. The generated reports clearly show 4.300 GHz on one computer and the correct 5.300 GHz on the other.

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18 Posts

02-26-2021

Germany

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Re:Legion T7 34IMZ5 i9 CPU issue

2021-02-27, 10:00 AM

I really hope a Lenovo engineer will look at this post.

 

 

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768 Posts

04-13-2012

Iceland

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Re:Legion T7 34IMZ5 i9 CPU issue

2021-03-05, 16:20 PM

Hello.

Is this particular to a Lenovo system or does the problematic CPU show this in other systems too?

All the best!
Atli Jarl.

ThinkStation P620 - 3955WX/64GB // ThinkPad X1E Gen3 - i7-10850H/32GB
ThinkPad P1 - i7-8750H/32GB // ThinkPad P70 - Xeon E3-1505M/64GB
ThinkPad W540 - i7-4800MQ/32GB // ThinkPad W520 - i7-2720QM/32GB
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14 Posts

02-01-2015

Kuala Lumpur

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  • Message 8 of 22

Re:Legion T7 34IMZ5 i9 CPU issue

2021-03-05, 18:18 PM
Hey there. Can we get the temps of the machine under load? I believe AIDA64 has a built in System Stability Test + temp charts.
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18 Posts

02-26-2021

Germany

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  • Message 9 of 22

Re:Legion T7 34IMZ5: i9 CPU max clock speed issue

2021-03-05, 18:39 PM

I remember checking this: not exceeding 50-55 degrees, 0% CPU throttling.

 

Good news I found a fix in the meantime. The BIOS version the PC was delivered with was O4LKT19A, so the latest one. I re-flashed the BIOS with the same version but prior to that I disabled a specific setting that prevents flashing the current or an older version. After this the CPU is listed with max speed of 5.3 GHz instead of 4.3 GHz as per the initial screenshots.

0 person found this solution to be helpful.

This helped me too

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14 Posts

03-05-2021

Finland

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Re:Legion T7 34IMZ5: i9 CPU max clock speed issue

2021-03-05, 19:28 PM

Hi,

 

So did it actually improve your performance? Could you please run Cinebench r23? I only got 8086 multi core points. Not good at all. It should be around 15113 multi core points in full load.

 

If you managed to improve its performance, could you please share your method? Seems like you have a way more knowledge of the system handling.

Best,

Juha

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