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Green 240-pin DDR3 UDIMM with black memory chips and a white label

A-Tech

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

SKU CH-EZ5R-WZ4QD

4GB DDR3 1866 ECC unbuffered UDIMM with CL13 latency and 1.5V operation

  • Total capacity4 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMicron Chipset
  • CAS latencyCL13
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity with built-in error correction
  • 1866 MHz DDR3 speed accelerates server workloads at PC3-14900 bandwidth
  • 50 V standard voltage keeps power draw predictable
  • 1Rx8 single-rank layout simplifies memory configuration
  • 240-pin UDIMM form factor fits compatible server boards

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.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 96% of the 6,523 comparable items (median $188.99).
Total capacity 4 GB
Lower than about 95% of the 6,064 comparable items (median 32 GB).
Price per GB $4.25 per GB
Cheaper than about 79% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Micron
Model nameMT9JSF51272AZ-1G9E2, MT9JSF51272AZ-1G9P1
Total capacity4 GB
Performance
Rated speedDDR3 1866 (PC3 14900)
Processor
ChipsetMicron Chipset
Memory
CAS latencyCL13
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.5 V

Questions about this item

How can I confirm the module is running at 1866 MHz with ECC active after installation?

Check the BIOS memory information screen; it should show DDR3 1866 speed, 1.50 V voltage, ECC enabled and the correct 4 GB capacity.

What comes in the package and do I need any extra parts to install it?

The box contains one 4 GB 240-pin DDR3 UDIMM; no cables, brackets or additional components are required for installation.

Which version should I choose if my server lists Micron MT9JSF51272AZ-1G9E2 or MT9JSF51272AZ-1G9P1?

This module is a compatible replacement for both Micron part numbers, so either listing points to the same 4 GB DDR3 1866 ECC UDIMM.

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