Heh, didn't think it was defensive. The 2nd gen epycs did have chips with reduced memory bandwidth, the 3rd gen didn't. I believe the posted URL from servethe

Heh, didn't think it was defensive. The 2nd gen epycs did have chips with reduced memory bandwidth, the 3rd gen didn't. I believe the posted URL from servethehome has a pretty good explanation. My theory is that the 2nd gen Epycs had a bottleneck in the chiplet uplink connections, so that 4 chiplets couldn't manage the full bandwidth. So maybe the 3rd gen increased those links so even 4 chiplets could still handle 100% of the available memory bandwidth. It does boggle my mine that a $2k apple desktop has 400GB/sec of memory bandwidth and that a $4k apple desktop has 800GB/sec of memory bandwidth.