No, Mr. Dimm isn't the name of a Bond villain, nor is it the name of a less-than-smart school teacher in a teen comedy. MRDIMM is, in fact, an AMD- and JEDEC-backed attempt at standardising a kind of monstrously wide, fiendishly high-capacity, high-bandwidth, and somehow relatively cheap DDR5 memory. And now, Micron's unleashed it (via Wccftech) into the wild.
We regular folk are used to standard "unregistered" RAM sticks forming some of the best RAM for gaming, but servers often use "registered" DIMMs, or RDIMMs. These buffer their control instructions to improve reliability, which is more important for servers than home users. MRDIMM, meaning Multi-Ranked buffered DIMM, works on this RDIMM design but (you guessed it) adds multiple ranks of DRAM.
