No way possible to make the memory go faster than the processor can run it at.
If you never plan on using the memory in a newer notebook, you may as well buy the DDR4-2400 memory.
If the DDR4-3200 memory is the same price, you may as well buy that.
It won't hurt anything and then you could use it in a PC with an Intel 9th or 10 gen processor.
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