DDR5 vs DDR4: How Much Performance Will You Gain From

If you compare two similar laptops, one using a DDR memory and the other using an LPDDR memory, you won't be able to notice the difference

slots to achieve this DDR4 and DDR5 sticks only Threadripper and Epyc and Xeons and HEDT are the same thing, just different SKUs of the same

ddr4 in ddr3 slot So most likely there won't be any AM5 Motherboards with both DDR4 & DDR5 DIMM Slots on it since DDR4 and DDR5 are not compatible to each other

ddr4 slot As noted already, DDR5 uses a different operating voltage than DDR4, has a different architecture, and has the key slot in a different location