The RAM speed is constrained by either the CPU or the motherboard.
The RAM speed is constrained by either the CPU or the motherboard.
The Intel website states the i5-7200 can use DDR4 2133, but CPU-Z indicates a speed of 2666.
Values over 2133 are considered "overclock" and may not be supported by Intel. Usually functions properly.
It was likely in the North bridge before. Now, at least on AMD, the northbridge is on the CPU. Uncertain about Intel's setup.
Memory controller is located in the CPU for all CPUs for a long time now. Some, like AMD Ryzen, use a dedicated Chiplet for I/O including RAM. MB may restrict RAM frequency due to architectural issues, and BIOS might lack proper settings, requiring manual adjustment of all parameters instead of relying on JEDEC or XMP.