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A-Tech 4GB DDR3 1866 ECC UDIMM 240-pin green circuit board with black chips

A-Tech

A-Tech 4GB DDR3 1866 ECC UDIMM 2Rx8 for Micron MT18JSF51272AZ-1G9 Server Memory

SKU CH-YJAQ-TBZ2D

4GB DDR3 1866MHz ECC unbuffered DIMM for Micron MT18JSF51272AZ-1G9 with CL13 latency and 1.5V operation

  • Total capacity4 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL13
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • 4GB capacity handles heavier workloads
  • 1866MHz DDR3 speed accelerates data throughput
  • CL13 latency reduces access delays
  • ECC UDIMM protects against data errors
  • 240-pin DIMM fits standard server slots

Server memory upgrade

This 4GB DDR3 1866 ECC UDIMM module replaces the Micron MT18JSF51272AZ-1G9 in compatible servers and workstations. It runs at CL13 latency with a standard 1.50V supply and uses a 2Rx8 organisation on major-brand chips. The unbuffered DIMM targets administrators who need reliable capacity for everyday workloads.

Build integration

The 240-pin DIMM plugs directly into a DDR3 ECC UDIMM slot on the motherboard, requiring no registered buffer or additional cooling. ECC support lets the platform detect and correct single-bit errors, freeing the system from silent data corruption during long compute jobs. Verify the board accepts unbuffered ECC modules at this speed before installation.

Who it suits

Ideal for IT teams expanding memory in validated DDR3 server platforms that specify PC3-14900 unbuffered ECC. Not for builders who need registered or load-reduced DIMMs, higher densities per slot, or a newer DDR generation. Buyers without a qualified hardware compatibility list should confirm support with the system vendor first.

How it compares

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

Price $19.99
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 $5.00 per GB
Cheaper than about 73% 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 2Rx8 dual-rank organisation limit how many of these 4 GB DDR3 1866 modules a server board can populate per channel?

Each module is a 2Rx8 dual-rank part, so the maximum number per channel depends on the server board's rank limit for DDR3 1866 memory.

What heat or power load should I expect when the ECC UDIMM runs continuously at 1.50 V?

The module operates at the standard DDR3 1.50 V without extra cooling requirements; sustained server workloads stay within normal DDR3 thermal limits.

My system needs a 240-pin DDR3 DIMM slot — is that the only requirement for this 1866 MHz ECC stick?

Yes, the board must provide a 240-pin DDR3 UDIMM slot that supports ECC and 1866 MHz speed for the module to function.

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