Hm shit, now that you mention it, I didn't even consider X399. The only downside seems to be the lack of support for 3200mhz ddr. In our case that board specifi

Hm shit, now that you mention it, I didn't even consider X399. The only downside seems to be the lack of support for 3200mhz ddr. In our case that board specifically doesn't have room for the 4th GPU so it's not an option for us. We've got a weird use case, we're using (black box) software that's sensitive to clock speed, scaling only to about 8 threads until it starts levelling off aggressively (to the point where a 3970X benchmarks as faster than a 3990X). So what we do is we run 4 instances, each with their own GPU and 8 cores assigned to it. I'd be surprised if this makes sense anywhere else (as EPYC has all sorts of other advantages in HPC).