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Green printed circuit board with black memory chips and gold edge connectors, 240-pin DDR3 UDIMM form factor

A-Tech

A-Tech 4GB DDR3 1600MHz ECC UDIMM 2Rx8 Server Memory

SKU CH-JNSK-EGJKZ

4GB DDR3 1600MHz ECC UDIMM module with CL11 latency and 1.5V operation for server upgrades

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMicron Chipset
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity on critical workloads
  • 1600 MHz DDR3 speed handles demanding server tasks
  • 2Rx8 dual-rank layout maximises 4 GB module density
  • 50 V standard voltage ensures broad platform compatibility
  • 240-pin UDIMM form factor fits standard server slots

4GB DDR3 1600 ECC UDIMM for Servers

This A-Tech module provides 4GB of DDR3 1600MHz ECC unbuffered memory for server and workstation systems. It operates at 1.5V with CL11 latency and uses a 2Rx8 rank configuration on a 240-pin DIMM form factor. The module is a compatible replacement for the Micron MT18JSF51272AZ-1G6M1 part number.

Suits ECC UDIMM slots.

This memory suits administrators upgrading or repairing servers that accept unbuffered ECC DDR3 DIMMs. Builders whose platforms require registered or load-reduced DIMMs should look at different modules, as this stick will not function in those slots. Systems limited to non-ECC memory also cannot use this module.

240-pin DDR3 DIMM form factor decides fit

The single specification that decides compatibility is the 240-pin DDR3 DIMM form factor combined with unbuffered ECC operation. Verify your motherboard documentation for DDR3 1600MHz PC3-12800 UDIMM support and 2Rx8 rank acceptance before purchasing.

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 nameMT18JSF51272AZ-1G6M1
Total capacity4 GB
Performance
Rated speedDDR3 1600 (PC3 12800)
Processor
ChipsetMicron Chipset
Memory
CAS latencyCL11
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.5 V

Questions about this item

Does the DDR3 1600 PC3-12800 interface limit the module to CL11 timing at 1.50V?

Yes, this ECC UDIMM is specified at CL11 CAS latency and operates at the standard DDR3 voltage of 1.50V.

Will the 240-pin DIMM fit a standard server UDIMM slot keyed for 262-pin modules?

The module uses a 240-pin DIMM form factor; 262-pin is a different keying used for SO-DIMMs, so verify your board accepts 240-pin UDIMMs before ordering.

Is there a specific orientation step for installing this 2Rx8 ECC UDIMM that installers often miss?

Align the notch on the 240-pin edge connector with the slot key, press straight down until both retention clips click — forcing it backwards bends pins and prevents the ECC module from seating.

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