A-Tech 4GB DDR3 1866 ECC UDIMM 1Rx8 240-Pin Server Memory

4GB DDR3 1866 ECC UDIMM for servers

This 4GB DDR3 1866 ECC UDIMM module targets servers and workstations that require error-correcting unbuffered memory. It replaces Micron MT9JSF51272AZ-1G9E2 and MT9JSF51272AZ-1G9P1 parts in compatible platforms. The single-rank 1Rx8 organisation suits systems that populate multiple slots per channel.

Installation notes for 240-pin DDR3

The module uses the standard 240-pin DDR3 DIMM keying and installs like any unbuffered DDR3 stick. Align the notch, press evenly until the latches click, and verify the BIOS reports 1866 MT/s at CL13. Mismatched ranks or mixing registered and unbuffered DIMMS are the usual reasons a system will not post.

4GB capacity and DDR3 1866 headroom

Four gigabytes handles light virtualisation, file-serving and legacy application workloads without paging. Heavy databases, large VM counts or memory-intensive analytics will exhaust the module quickly. The 1.50V DDR3 standard voltage limits overclocking headroom, so the rated 1866 speed is the practical ceiling.