Now that both Samsung and Micron are shipping their 16 Gb DDR4 memory chips to third parties, we're seeing wider availability of 32 GB unbuffered memory modules (UDIMMs). To date, eight brands have either introduced, or started to sell their 32 GB unbuffered DIMMs, and in the coming months more manufacturers are expected to follow. The Basics Before we proceed, let us recap the basics here. Because of the way memory sub-systems work, high-capacity memory modules (in our case, 32 GB and higher) for workstations and servers are built differently than regular DIMMs for client PCs (which are called unbuffered DIMMs, or UDIMMs). Registered DIMMs (RDIMMs) carry a register chip that buffers the address and command signals, whereas the Load Reduced DIMMs (LRDIMMs) replace the register...

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