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Green 240-pin DDR3 UDIMM module with black chips and gold contacts

A-Tech

A-Tech 4GB DDR3 1866 ECC UDIMM 1Rx8 Server RAM

SKU CH-QWF3-H8B2G

4GB DDR3 1866 ECC UDIMM module with CL13 latency and 1.50V operation for server memory upgrades

  • Capacity4GB
  • SpeedDDR3 1866 (PC3 14900)
  • CAS LatencyCL13
  • Voltage1.50V
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ECC protection guards data integrity with built-in error correction
  • 1866 MHz DDR3 speed delivers responsive server performance
  • 5 V standard voltage ensures broad platform compatibility
  • 240-pin UDIMM form factor fits standard server slots
  • 1Rx8 single-rank layout supports flexible memory configurations

4GB DDR3 ECC UDIMM for Servers

This 4GB DDR3 1866MHz ECC unbuffered DIMM uses a 1Rx8 layout with CL13 latency at 1.5V. It targets administrators maintaining or expanding older server and workstation platforms that require DDR3 ECC memory in a 240-pin form factor.

Direct Hynix Replacement Module

The module is specified as a compatible equivalent for Hynix part numbers HMT451U7AFR8C-RD, HMT451U7BFR8C-RD and HMT451U7DFR8C-RD. Using major-brand chips, it allows a like-for-like swap without firmware changes, restoring original capacity and error-correction behaviour in qualified systems.

DDR3 1866 PC3-14900 Interface Limits

The DDR3 1866 PC3-14900 standard caps per-module bandwidth and density at this speed grade. Systems needing higher throughput, larger individual modules, or registered DIMM buffering cannot be satisfied by this unbuffered DDR3 specification.

Highlights

  • ECC protection guards data integrity with built-in error correction
  • 1866 MHz DDR3 speed delivers responsive server performance
  • 5 V standard voltage ensures broad platform compatibility
  • 240-pin UDIMM form factor fits standard server slots
  • 1Rx8 single-rank layout supports flexible memory configurations

Specifications

BrandA-Tech
Capacity4GB
SpeedDDR3 1866 (PC3 14900)
CAS LatencyCL13
Voltage1.50V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

Questions about this item

Will the 1Rx8 ECC chips on this 4 GB DDR3 1866 module ever need replacement under normal server use?

The Major Brand Chipset and 1Rx8 layout are built for continuous server workloads; ECC corrects single-bit errors on the fly so the module itself does not require scheduled replacement.

What limit appears first when this CL13 1.50 V DDR3 1866 stick runs at full load for hours?

The 1.50 V standard voltage and CL13 latency set the thermal ceiling; sustained full-speed operation will hit the DDR3 JEDEC thermal limit before any timing or voltage headroom is exhausted.

How much heat and fan noise does this 240-pin unbuffered ECC DIMM add when the server runs all day?

At 1.50 V the module draws only standard DDR3 power, adding minimal heat that existing server airflow handles without extra fan speed or audible noise increase.

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