Awful Lafitté pro III performance

[ced]

Hello,
I've just done a performance test on my Lafitté pro III , using Passmark benchmark.

I am astounded by the bad performance of my laptop, excepted for the samsung 990 pro ssd hard drive that works perfectly.
What I don't understand is how, the CPU mark for my laptop can be 75% lower than the average i7-1360P CPUmark score , mine is around 5000 whereas the average CPUmark score for i7-1360P is 20 000 !!
For instance, my laptop does 31 math integer MOps/sec whereas the i7-1360P, does in average 71 MOps/sec
My laptop does 15,6 MOps/sec floating point instructions vs 48 MOps/sec floating point instructions in average for i7-1360P according to Passmark
The rest is the same
How is this difference possible ???

Is the motherboard or the RAM the source of these bad results ?
I have done the test twice with same results, without any other process running except windows explorer, and with Best performance power setting.
The global benchmark result states that my laptop belongs to the worse 25% results submitted worldwide to their database :-(
Thanks for your help !
My configuration:

 

[Martinr36]

What OS are you using and where did you acquire it

 

[ced]

It is windows 11 pro, installed making a clean install following the instructions in this site: https://www.microsoft.com/en-us/windowsinsider/cleaninstall

 

[Martinr36]

I would try a reinstall but delete the existing partitions first, this is the method i use:

Download a new copy of Windows using the Media Creation Tool (Second option on linked page) to an 8GB (min) USB.
Boot that USB and choose a Custom Install.
Delete all UEFI partitions on the system drive (EFI System, Recovery, MSR Reserved, Primary).
Select the unallocated space that results and click the Next button. The installer will create the correct partitions and install Windows.
Run Windows Update repeatedly, even across reboots, until no more updates are found.
You may need/want to download and install the latest graphics driver from the Nvidia/AMD website (they change so regularly the latest version isn't always in the Windows libraries).

This is also worth a watch

 

[ced]

My bad, I had set Best performance in Windows 11 settings, but I had let Power Saving setting in Control Center.
Putting Performance setting in Control center , the good performances of the i7_1360P are back