Used
16GBDDR4
Samsung M393A2K40DB2-CVF 16GB DDR4-2933 ECC RDIMM Server Memory (Used, Tested)
Samsung
$130.38
In stock1
DDR4 ECC RDIMM Server Memory
DDR4 registered ECC memory, or RDIMM, is the memory used by the server generations seen most often on the used market. That covers Dell PowerEdge, HPE ProLiant and Supermicro systems built on Intel Xeon E5 v3 and v4, Xeon Scalable and AMD EPYC platforms. A register chip on each module buffers address and command signals, which lets a server hold many more modules per channel than unbuffered memory, and ECC corrects single-bit errors on the fly. When you buy, match three things: speed (for example PC4-2933), rank and width (such as 2Rx4), and module type, because RDIMMs cannot be mixed with UDIMMs or LRDIMMs in the same system. The whole channel runs at the speed of the slowest module. Our listings carry the exact part number, and every module is tested in a real server board before it ships.
2 in stock · Tested in-house · 30-day returns
DDR4 ECC RDIMM Server Memory: common questions
Can I mix RDIMMs with different speeds?+
Yes, as long as they are all RDIMMs. The memory runs at the speed of the slowest module, so a faster module simply downclocks. Mixing ranks is usually allowed but check your server’s population rules.
Can I use RDIMMs in a desktop motherboard?+
Only if the board and CPU support registered memory, which most consumer desktop boards do not. Workstation and server boards for Xeon and EPYC do.
What do 1Rx4 and 2Rx4 mean?+
The first number is the rank count and x4 or x8 is the DRAM chip width. Servers have rules on how many ranks each channel accepts, so match what your system already runs when adding modules.
What warranty comes with used memory?+
Used memory carries a 90-day warranty, and every order has 30-day returns.