It seems that DDR5 manufacturing is already ramping up this year:
Looking at the graph below, this doesn't seem to be just some edge-case test chips or custom sillicon. IMO at least one mainstream SKUs (even if just on server) need to support it to justify 7-8% of units shipped:
I wonder what SoCs will use it? I doubt It's only Sapphire-Rapid or Genoa, as these seem to be late 2021 products.
I wonder if AMD plans to do a new socket and I/O die for Zen 3 with DDR5 support. Wouldn't be
that unheard of, considering there have been CPUs supporting multiple generations of memory before. DDR2/3 were both supported by Phenom 2 and Core 2. Likewise DDR3/4 for Haswell.
EDIT:
Regardless the following Hynix slide really made me salivate for DDR5 for desktop. Notice how it mentions DDR4 only between 1600-3200 Mbps as
1.2V DDR4 does indeed only go to 3200 MHz. Yet overclocked 1.35V ram was available up to 3200MHz,
Only a couple months after launch and goes significantly beyond that.
Now according to anandtech DDR5 starts at 4800 Mbps. My guess is overclocked ram should be available at least up to 5600 Mbps (1.25V) near launch.
Cadence is confident that DDR5 ramp will begin with 16 Gb DRAMs at 4800 MT/sec/pin data transfer rate (something that was indirectly confirmed by SK Hynix’s
DDR5-4800 module showcase at CES 2020).
That looks to be quite an advantage: