AMD released their Zen 2-based Ryzen 3000 processors in July this year, and they instantly became a smash hit with gamers, due to their solid performance, and good pricing. The company's flagship processor at this time is the Ryzen 9 3900X, priced at $500, featuring 12-cores/24-threads, with clocks reaching up to 4.6 GHz. Now BIOSTAR has posted an update to their motherboard CPU support list, which mentions a previously unannounced "Ryzen 9 3900", without the "X", running at 3.1 GHz base clock and having a TDP of 65 W (the 3900X has 105 W TDP).

It looks like the Ryzen 9 3900 non-X is a more power-efficient version of the 3900X with lower clocks. It's possible that it is made from chips that failed the clock-frequency certification for the 4.6 GHz boost clock of the 3900X, but that work fine otherwise. By dialing down the TDP of their chip, AMD could also build an interesting SKU for OEMs, that want to market the high core counts, but aren't willing to drive up the cost of their power and cooling setup.