We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Capacity4GB
  • SpeedDDR3 1866 (PC3 14900)
  • CAS LatencyCL13
  • Voltage1.50V
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • 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.

Highlights

  • 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

Specifications

BrandA-Tech
Capacity4GB
SpeedDDR3 1866 (PC3 14900)
CAS LatencyCL13
Voltage1.50V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.