Question DDR3 -> DDR4 = faster boot time ?

Would switching from the same amount of DDR3 to DDR4 make a noticeable difference in boot time of Window 10?
Yes, but no.

To go from DDR3 to DDR4, you would need to change the motherboard.
Along with a fresh OS install.

Given a fresh OS install, it will boot 'faster' than what it is doing now.

So any difference would not really be from the RAM, but rather the new OS.


What is your boot time now?
 
Would switching from DDR3 RAM to the same amount of DDR4 RAM make a noticeable difference in boot time of Window 10?

If the system in your sig is what you are inquiring about, you cannot do it. It would need to be a whole new system. It looks like you are using a HDD. Swap that for a 2.5" Sata SSD and you will see a world of difference in all load times.