Hmm, seems pretty close. Not sure how the memory channels related to the performance. But the ampere board above has 8 64 bit channels @ 3200 MHz, the AMD Tur

Hmm, seems pretty close. Not sure how the memory channels related to the performance. But the ampere board above has 8 64 bit channels @ 3200 MHz, the AMD Turins have 24 32 bit channels @ 6400 Mhz. So the AMD memory system is 50% wider, 2x the clock, and 3x the channels. As for price the AMD Epyc Turin 9115 is $726 and a common supermicro motherboard is $750. Both the Ampere and AMD motherboards have 2x10G. No idea if the AMD's 16 cores with Zen 5 will be able to saturate the memory bus compared to 64 cores of the Amphere Altra. I do hope the AMD Strix Halo is reasonably priced (256 bits wide @ 8533 MHz), but if not the Nvidia Digit (GB10) looks promising. 128GB ram, likely a wider memory system, and 1 Pflop of FP4 sparse. It's going to be $3k, but with 128GB ram that is approaching reasonable. Seems like it's likely has around 500GB/sec of memory bandwidth, but that is speculation. Interesting Ampere board, thanks for the link.