Three company collaboration produces DDR5-8000 as MCR-DIMM. The trick here are data buffer chips, which Renesas has developed over a long period of time, which can effectively double the data rate. Intel wants to use the modules as a future solution and thus close some gaps in Optane.
Intel Optane is dead, Intel itself has already declared that. Sapphire Rapids are still coming onto the market with a new generation, but that's the end of it. The future lies in classic memory plus CXL modules. This is exactly where the new DDR5 memory comes in, making even more bandwidth available on this side, while CXL will dominate in other areas.
Intel's move to SK Hynix as a memory manufacturer this time is interesting. Optane was developed with Micron at the time, but never went beyond a niche product. It should not only revolutionize the world in RAM, but also be a snappy alternative to NAND. But high costs and other problems finally sealed the end, Micron had practically said goodbye to the topic internally years ago, Intel only pulled the ripcord in the summer of 2022.
Three years of development
However, the DDR5 Multiplexer Combined Ranks (MCR) Dual In-line Memory Modules are not as revolutionary as 3D XPoint, although many considerations and, above all, time have gone into them. This is shown, among other things, by the statement by Renesas, who developed the buffer chip: It took them three years to develop the chip from the idea and concept to a final product.