Big Sur very slow boot after ram upgrade

[kinesis]

Hey everyone!
After upgrading my ram from 64 to 128, Big Sur opens but it's very slow.. around 10mn..
Any idea would be appreciated
Specs:
Big Sur

Intel I9 10900
Gigabyte Z490 Vision G
AMD Radeon 5600 xt
Samsung SSD 1t
I'm using OpenCore Configurator
I have a dual boot and win 11 works perfectly.

Thanks for your time and help!
Best

 

[wstrohm]

Do you have your matched pairs of RAM in every other slot?

 

[kinesis]

Do you have your matched pairs of RAM in every other slot?

Thank's for your answer
yes. I installed 4x32 :/