Running at 100% rate and Unstable system

Hey,

I’m running 5600 XT, 5700 XT, and two 1660 Super

Mine looks weird as two of Radeon GPUs are running at 100%

and two 1660 Super is running at different rate.

Does anyone know what the problem is to this?

Furthermore, I cannot stabilize the system somehow.

When I change Radeon OC setting, the system goes down.

Is there way to stabilize my system?

Thanks in advance!