Bad news for those who currently own a first or second-generation Ryzen Threadripper platform as it appears the next generation will not be backwards compatible with the previous ones. TechPowerUp picked up news that the TRX40 chipset based motherboards will not support first-generation and second-generation Threadrippers. Furthermore, you will only be able to use one of the new third-generation Threadrippers in a new TRX40-based motherboard.
We've been hearing from reliable sources rumors of this segmentation from AMD for a few days now, and tech journalist ReHWolution just tweeted its confirmation having obtained info on upcoming motherboards from ASRock. The company is working on the TRX40 Taichi and TRX40 Creator motherboards.
At this moment, it's unknown if there's a good technical reason why AMD decided to break backwards compatibility.