Someone should edit the title to make it clear it only has 252GB of “AI” memory

Agree, the CPU memory is about 400GB/s vs. Apple M5 Ultra at 1.2TB/s. But the M5 only has that, not the 7TB/s portion. So this box could* still be faster when using the full 748GB if both RAM types can be used without the slower part bogging everything down. *That comes down to implementation. Maybe somebody can chime in on this.