Why is the maximum frequency of RAM on the mat. boards depends on the chipset level?

Question

Iron

Why does the maximum RAM frequency on modern motherboards depend on the chipset level?
After all, information from RAM goes directly to the processor and not through the chipset?

Answer 1

And why are products from the same conveyor (memory chips, processors, etc.) then sold at different frequencies?
There are three reasons:
- marketing - to take away all the price/market niches, while reducing the cost of development (only one or very similar products).
- related to the first reason - cheaper production of "cheap" solutions at the next stages.
- technological spread of parameters (tested and decided).
The second reason works for chipsets. Not everyone needs 4333 memory frequencies - most people need 2666. Not everyone needs 4 PCIe lanes on NVMe - many even install SATA. So why don't they sell the product simpler in circuit board design, manufacturing and cheaper?
And those who can "fork out" will buy the "older" model, because. in the "younger" there is no necessary functionality.