DDR5 memory that comes with high capacity and speed was introduced last year when Intel introduced their Alder Lake series of processing chips, and AMD this year through their AMD Ryzen 7000 processing chips.
If you feel that DDR5 memory with a speed of 6000MT/s and a capacity of 32GB per stick, Intel and SK Hynix seem to be developing a new DDR5 memory module called MCR DIMM that promises faster capacity and speed than what is offered now.
MCR in this context is a Combined Ranks Multiplexer that allows memory chips in a dual-rank configuration (memory chips on both sides of a RAM stick) to be used in parallel.
Typically, when dual-rank memory is used, even if it has a high capacity, the amount of memory that can be sent to the CPU at one time is only 64 bits on each side of the memory, and this limits the speed of data that can be sent.
With this MCR technology, the memory can combine the memory from both parts of the RAM by 128bit, and this directly not only increases the speed of RAM data transmission, but also allows the memory supplier to add a large number of memory chips for users to benefit from.
Even so, a significant drawback can be seen through the use of this memory is the latency time required because the data sent needs to be entered into the cache first before it is sent.
Intel and SK Hynix also say that to take advantage of this MCR memory, the CPU part needs to support this memory so that latency issues are not a problem.
With speeds that can exceed 8000MT/s, SK Hynix said they want to bring this memory to the computing industry such as data centers and supercomputers, but did not say when it would start to be produced for those purposes.