Another Report of Ryzen Threadripper 3000 Losing Backwards Compatibility

Italian hardware site ReHWolution has received some early information regarding ASRock’s unannounced TRX40 Taichi and Creator motherboards. Apparently, they’re not backwards compatible with first- or second-generation Threadripper CPUs. Ryzen Threadripper 3000 won’t work on X399 boards, either.

The underlying reason between this restriction remains a mystery. We know that the EPYC “Rome” MCM is pin-compatible with first-generation EPYC “Naples” chips due to the fact that the newer chips are drop-in compatible with older servers via a BIOS update. The TR4 socket, too, is nearly identical to SP3r2, but for four out of eight memory channels being blanked out.


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