AMD Ryzen 7000 Zen 4 Confirmed To Support DDR5-5200 Memory Speeds At Launch
Another point in the favor of that argument is the slide above from Apacer Industrial, discovered by Twitter leaker @momomo_us, which clearly marks down Zen 4-based Ryzen and EPYC processors for DDR5 memory running at up to 5200 MT/s. That's a fair whack faster than the DDR5-4800 officially supported by Intel's latest chips, although Intel's processors certainly aren't limited to just that.
The slide is buried in an obscure page that outlines the benefits of DDR5 memory over DDR4, like higher transfer rates, higher density, and on-module power management, and it certainly isn't official AMD material, which means it's possible that AMD's Ryzen 7000 chips could be spec'd for lower or even higher DDR5 speeds. Still, it's likely that Apacer was given these numbers by AMD, so we're ready to take them at face value.
Of course, AMD's aforementioned emphasis on Zen 4's ability to hot-clock DDR5 could just as easily be an indication that the Infinity Fabric clock on Ryzen 7000 processors ISN'T linked to memory speed anymore. After all, such a link is still likely to limit the peak memory speed, and DDR5 is already expected to scale past 7000 MT/s. Here's hoping that prices on the fancy RAM come down by the time AMD's next Ryzen chips hit the market, because they won't support DDR4.