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.

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.