Re: Ryzen 1800X - Instant system crash when running sequence of FMA3 instructions. Request for verification.
The issue with Flops was found and fixed in the beginning of february.
The current µcode version dates to 01/27/2017, so the fix is obviously not included yet (due to the time required for validation).
Flops is only affected when the SMT is enabled, so disabling the SMT can be used as a temporary work-around (until the actual fix arrives).