3 Things to Know About RAM Speed in the ThinkCentre M75q Gen 2

The system caps RAM speed at 3200 MHz when both slots are filled That is the maximum speed regardless of what RAM you install.

Slower RAM runs at its own rated speed If you put in 2666 MHz sticks, the system will run them at 2666 MHz, not 3200 MHz.

Faster RAM gets downclocked to 3200 MHz Installing 3600 MHz memory will not give you extra speed—the memory controller forces it to match the 3200 MHz ceiling.