A:Answer Unfortunately, you cannot switch a DDR4 RAM stick with a DDR5 RAM stick. DDR4 and DDR5 are different types of RAM that are not compatible with each other. DDR5 is the newer and faster type of RAM, but it is not backward compatible with DDR4. This means that you cannot use a DDR5 RAM stick in a DDR4 motherboard, and vice versa.
If you want to upgrade your RAM to DDR5, you will need to buy a new motherboard that supports DDR5. DDR5 motherboards are still relatively new and expensive, so you may want to wait a few years until the prices come down before upgrading.
In the meantime, you can still upgrade your RAM to a faster DDR4 stick. DDR4-3200 is a good option for gaming laptops, and it will give you a noticeable performance boost over DDR4-2666.