With the Ryzen 9 3900X, AMD dashed the hopes of enthusiasts and didn’t release a non-X version. It turns out there is a non-X model, but it is headed to OEM and system integrator (SI) builds, meaning you’ll have to buy the chip in pre-built systems.
However, the Ryzen 9 3900 also gives us a taste of what to expect from AMD’s new Eco-Mode feature, which allows you to downshift AMD processors into lower TDP envelopes with a single click in the BIOS or Ryzen Master software.
Read more @ Tom’s Hardware