Due to the AMD Ryzen 9 3950X's power requirements, many entry-level AMD motherboards might not support the 16-core monster. However, a ComputerBase reader noticed that the chip will work on ASRock's A320M-DVS R3.0 motherboard, which gives us a bit of hope.
A320 motherboards are at the bottom tier the motherboard stack with lower power delivery subsystems, so it's surprising ASRock has listed that its A320M-DVS R3.0 motherboard is compatible with the Ryzen 9 3950X. Shockingly, support is limited to this specific revision, as the newer A320M-DVS R4.0 model seemingly lacks support for the the CPU. Both revisions continue to employ a six-phase power delivery subsystem. Other than the slight aesthetic change, it's unclear what the difference is between the two motherboards that would make one compatible with the Ryzen 9 3950X but not the other.
In order to get the Ryzen 9 3950X to work on the A320M-DVS R3.0, it's necessary to update the motherboard's firmware to the latest 3.30 BIOS, which incorporates the AGESA 18.104.22.168ABB microcode. MSI has given us the heads-up that Ryzen owners can expect a new microcode that reportedly brings over 100 improvements next month. Perhaps there's a little something in there for A320 motherboard users.
AMD hasn't officially announced if the Ryzen 9 3950X will work on A320 motherboards. We probably won't find out until the 16-core part drops next month, assuming AMD doesn't run into any more setbacks.