Originally Posted by DNMock
Isn't PCIE 5.0 still a good 3 or 4 years out on consumer level stuff?
PCIE 4.0 final specs came out 2 years before PCIE 5.0.
4.0 bring new things, like OCuLink-2, and of course the higher clocks. But PCIE 5.0 isn't bringing something new, but mostly the big different is compression and data transfer protocol. Meaning PCIE 4.0 is using a similar transfer protocol as 3.0, but with higher clocks. 5.0 brings better data transfer protocols which allow higher bandwidth on the same new higher clocks.
There are 6 differences between 4.0 and 5.0, and they are mostly in a few features that were developed just after pcie 4.0 was completed.
So, what it means is that a motherboard that support PCIE 4.0 could potentially support PCIE 5.0 with the right firmware. That is why it is expected to already be available on the servers side in 2021 (along with DDR5) and it was leaked that intel will release new chips that support them.
Once it is on the server side, and when 7nm becomes common, we might see 5.0 starting to make its way into high end desktops.