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Green circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 4GB DDR3 1866MHz ECC UDIMM CL13 1.5V 2Rx8 240-Pin Server Memory

SKU CH-EJ3V-37CKB

4GB DDR3 1866MHz ECC unbuffered DIMM with CL13 latency and 1.5V operation for server upgrades

  • Total capacity4 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL13
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • 4GB DDR3 1866MHz module adds responsive capacity for server workloads
  • ECC unbuffered design detects and corrects single-bit errors to protect data integrity
  • CL13 latency at 1.5V standard voltage balances speed with stable power draw
  • 2Rx8 240-pin layout fits compatible DDR3 server and workstation boards
  • Tested with major-brand chips to deliver dependable performance in critical environments

Server DDR3 ECC module

This 4 GB DDR3 1866 MHz ECC UDIMM uses a 240-pin form factor and runs at 1.5 V with CL13 latency. It is built with major-brand chips in a 2Rx8 configuration for server and workstation platforms. The module is a direct replacement for Hynix HMT351U7CFR8C-RD and HMT351U7EFR8C-RD parts.

Compatibility checks

Verify that your system accepts DDR3 ECC unbuffered DIMMs at 1866 MHz (PC3-14900) and supports 1.5 V operation. Confirm the motherboard or server manual lists 2Rx8 modules and 240-pin UDIMM slots. Cross-reference the Hynix part numbers above to ensure the correct rank and density match.

Sustained workload behaviour

ECC circuitry corrects single-bit errors continuously, maintaining data integrity during long compute jobs or virtualisation tasks. Standard 1.5 V DDR3 voltage delivers stable power draw without thermal spikes under constant load. Major-brand chips and factory testing provide consistent throughput for extended server uptime.

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).

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Specifications

Product
Brand nameA-Tech
Total capacity4 GB
Performance
Rated speedDDR3 1866 (PC3 14900)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL13
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.5 V

Questions about this item

Does the package contain anything other than the single 4 GB DDR3 1866 MHz ECC UDIMM module itself?

The box includes only the 1x 4 GB DDR3 1866 MHz PC3-14900 ECC UDIMM 2Rx8 240-pin module; no cables, brackets or additional parts are supplied.

I see only one capacity listed — is there a larger or smaller version of this exact module available?

This listing is for the 4 GB 1866 MHz CL13 1.5 V ECC UDIMM; other capacities or speeds would be separate part numbers not covered here.

What real-world effect does the 1866 MHz PC3-14900 rating have once the DIMM is installed in a compatible server?

The module runs at 1866 MHz with CL13 latency at 1.5 V, delivering the rated PC3-14900 bandwidth when the system memory controller supports that speed.

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