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Green 240-pin DDR3L UDIMM with black chips, 1Rx8 layout

A-Tech

A-Tech 4GB DDR3L 1333 ECC UDIMM 1Rx8 1.35V Server RAM

SKU CH-ECBJ-843Y9

4GB DDR3L 1333 ECC UDIMM module with 1Rx8 layout runs at 1.35V for low-power server upgrades

  • Total capacity4 GB
  • Rated speedDDR3L 1333 (PC3L 10600)
  • ChipsetMicron Chipset
  • CAS latencyCL9
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity in servers
  • 35V DDR3L cuts power draw and heat
  • 1333MHz CL9 speed handles heavy workloads
  • 240-pin UDIMM fits standard server slots
  • Tested Micron-compatible replacement ensures reliable operation

Capacity and form factor

This A-Tech module delivers 4 GB of DDR3L memory in a 240-pin UDIMM package. It is built for servers and workstations that require ECC protection and low-voltage operation at 1.35 V.

Who it suits and who it does not

The stick fits systems that accept DDR3L 1333 unbuffered ECC DIMMs with a 1Rx8 organisation. Buyers whose platforms demand registered memory, higher densities, or a different DDR generation should look elsewhere.

Deciding specification

The module runs at DDR3L 1333 (PC3L-10600) with CL9 latency and 1.35 V; matching those three values to the motherboard's supported memory list is the single check that confirms compatibility.

How it compares

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

Price $18.99
Cheaper than about 95% 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 $4.75 per GB
Cheaper than about 75% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Micron
Model nameMT9KDF51272AZ-1G4E1
Total capacity4 GB
Performance
Rated speedDDR3L 1333 (PC3L 10600)
Processor
ChipsetMicron Chipset
Memory
CAS latencyCL9
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.35 V

Questions about this item

How much heat does the 1.35V DDR3L module add when running continuously in a server?

The 1.35V DDR3L voltage reduces power draw compared to standard 1.5V DDR3, so the 4GB stick generates less heat during all-day workloads.

Does my motherboard need a 240-pin DDR3 slot that supports ECC unbuffered memory?

Yes — this is a 240-pin DDR3L UDIMM with ECC, so the board must accept unbuffered ECC modules at 1.35V.

Can I mix this 1Rx8 PC3L-10600 stick with older 1.5V DDR3 DIMMs?

Mixing 1.35V DDR3L with 1.5V DDR3 is not recommended; the system will default to the higher voltage and may destabilise the low-voltage module.

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