
If you were to install 1600 MT/s Crucial® memory with this CPU, you should expect the memory to downclock and run at 1333 MT/s because that’s the fastest speed the CPU will support. To answer this question, we must consider the many different combinations of. If you scroll down to the memory specifications section for the CPU on the Intel® website, you’ll notice it supports only up to 8GB of total memory, and DDR3 speeds of 1066/1333 MT/s. DDR4 memory running at its stock 2133MHz speed (shown as 1066.7MHz in CPU-Z). To illustrate some differences in CPUs, we will take a look at an older generation i7-2637M. Certain types of CPUs also support more advanced ECC memory like you would find in a server or workstation. So while a motherboard may support up to 2133 MT/s (Megatransfers per second) DDR3, most CPUs will not support that memory speed by default.


With modern CPUs the memory controller is built directly into the CPU itself, which means different types of CPUs may support different speeds of memory.

When looking at maximum memory speed supported for a specific motherboard or system, one thing that many people forget to take into account is the CPU.
