Dell 4GB 1Rx8 PC3L-12800R, MPN HMT451R7BFR8A-PB-RFB, is a refurbished memory module for a PC or server that supports this memory type. It provides 4 GB of DDR3 memory in a single 1Rx8 module.
The module is registered (RDIMM) and ECC, with a PC3L-12800R rating and a 1600 MHz speed. Its 240-pin DIMM form factor identifies the physical memory format. These registered ECC features are intended for systems built to support this type of memory.
This is a used or refurbished item, as specified in the listing.