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Green 240-pin DDR3L UDIMM with black chips, ECC label

A-Tech

A-Tech 4GB DDR3L 1600 ECC UDIMM 1Rx8 1.35V 240-Pin Server Memory

SKU CH-5MHA-98A6E

4GB DDR3L 1600 ECC unbuffered DIMM built as a Samsung M391B5173EB0-YK0 and M391B5173QH0-YK0 equivalent at PC3L-12800 speed

  • Total capacity4 GB
  • Rated speedDDR3L 1600 (PC3L 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • ECC protection prevents data corruption in server workloads
  • 35V DDR3L reduces power draw versus standard DDR3
  • 1600 MHz CL11 timing delivers responsive throughput for virtualisation
  • 240-pin UDIMM fits standard unbuffered server slots
  • Samsung M391B5173EB0-YK0 and M391B5173QH0-YK0 direct replacements ensure drop-in compatibility

4GB DDR3L ECC UDIMM for servers

This 4GB DDR3L 1600 module adds error-correcting memory to compatible servers and workstations. It runs at 1.35V with CL11 latency in a single-rank 1Rx8 layout. The 240-pin unbuffered DIMM fits standard DDR3 slots that accept low-voltage ECC UDIMMs.

Direct Samsung replacement modules

The stick is validated as a compatible equivalent for Samsung M391B5173EB0-YK0 and M391B5173QH0-YK0 part numbers. Major-brand chips are used throughout and every unit undergoes quality-assurance testing before shipment. This reduces the risk of mismatched timings or voltage when swapping out original Samsung memory.

Single-rank 1Rx8 ECC unbuffered design

The module uses one rank of eight-bit-wide chips with ECC parity and no register buffer. Systems that require registered DIMMs or dual-rank population rules will not accept this module. Verify the motherboard manual for UDIMM-only slots and maximum rank-per-channel limits before ordering.

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 speedDDR3L 1600 (PC3L 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.35 V

Questions about this item

Will the 1Rx8 ECC chips need replacement under normal server workloads?

The module uses major-brand DRAM chips tested to A-Tech quality standards and carries a lifetime warranty; no scheduled chip replacement is required.

What limit appears first when the DIMM runs at DDR3L 1600 continuously?

The CL11 CAS latency at 1600 MHz sets the timing boundary, while the 1.35 V DDR3L voltage ceiling defines the thermal envelope.

How much heat and power does the 1.35 V UDIMM produce in 24/7 operation?

At 1.35 V the low-voltage DDR3L design draws less power and generates less heat than standard 1.5 V DDR3, keeping thermals modest in a 240-pin slot.

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