Comment by smolder

I am only hypothesizing here, but I do not expect these to be useful on AMDs current AM5 platform due to the design of the memory controller.

The reason is there is currently a drop off in memory subsystem performance when you go above DDR5-6000 speeds on Ryzen 7x00 (and AFAIK Ryzen 9x00), because above that, the memory controller inside the chip can't run in lock-step with the memory frequency. Much of the enthusiast memory out there that is capable of higher speeds already, like say DDR5-7200, doesn't pair well with AMD chips as a result, as in that case the memory controller is forced to work at a 1:2 instead of a 1:1 ratio, introducing latency into the memory subsystem that results in overall worse performance.

On the other hand, if these CUDIMMs can hit high enough frequencies (like 10k+ MT/s,) it's possible that the benefits will outweigh the negative related to this quirk of the memory controller. Until I see this tested or someone with more expertise clarifies this point, it's hard to say. Perhaps DDR5-9600 will result in better performance than the current DDR5-6000 "sweet spot".