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Green 240-pin DDR3 DIMM with black chips and silver heat spreader

A-Tech

A-Tech 16GB DDR3 1066 PC3-8500 ECC RDIMM 4Rx4 HP 501538-001 593915-S21 Server RAM

SKU CH-A395-V0PJ4

16GB DDR3-1066 ECC registered DIMM with 4Rx4 organisation and 1.5V operation for HP 501538-001 and 593915-S21 servers

  • Total capacity16 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • 16 GB capacity expands server memory headroom for larger workloads
  • DDR3 1066 MHz PC3-8500 speed matches HP 501538-001 and 593915-S21 specifications
  • ECC registered design detects and corrects data errors for reliable operation
  • 240-pin DIMM form factor fits standard DDR3 server slots
  • 5 V standard voltage ensures compatibility with existing DDR3 infrastructure

16GB DDR3 ECC Registered Server Memory

This A-Tech module delivers 16GB of DDR3 1066MHz PC3-8500 ECC RDIMM capacity for server and workstation systems. It uses a 240-pin DIMM form factor with a 4Rx4 rank configuration and major brand chips. The module operates at standard 1.5V DDR3 voltage with CL7 latency. It serves as a direct replacement for HP part numbers 501538-001 and 593915-S21.

Thermals and Power in Normal Use

Registered DDR3 modules at 1.5V draw modest power and run cool inside adequately ventilated server chassis. The ECC and registered design adds minimal overhead compared to unbuffered memory. Noise remains dependent on system fans rather than the memory itself. No additional cooling beyond standard airflow is required for typical workloads.

ECC Registered Design for Data Integrity

The combination of ECC error correction and registered buffering is the specification that determines suitability for mission-critical servers. This module provides both features to protect against data corruption and reduce electrical load on the memory controller. Systems requiring non-ECC or unbuffered memory cannot use this part. Verify your platform supports ECC RDIMM before purchase.

How it compares

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

Price $30.99
Cheaper than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $1.94 per GB
Cheaper than about 94% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Total capacity16 GB
Performance
Rated speedDDR3 1066 (PC3 8500)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Power
Rated voltage1.5 V

Questions about this item

How do I install this 240-pin DDR3 RDIMM and what step is often missed?

Power down the server, open the chassis, align the notch on the 240-pin DDR3 module with the slot key, press firmly until both retention clips click, then verify in BIOS that the 16GB registered ECC module is recognised at 1066MHz.

What maintenance or replacement will this 16GB ECC RDIMM need over time?

No scheduled maintenance is required; the module uses major-brand chips tested for reliability. Replace only if memory diagnostics report correctable ECC errors that exceed the platform threshold or if a capacity upgrade is needed.

What limit appears first when this CL7 1.5V registered DIMM runs under sustained load?

The registered buffer and ECC logic add one cycle of latency, so the practical ceiling is the DDR3 1066MHz bus speed and CL7 timing; sustained throughput cannot exceed the PC3-8500 bandwidth rating.

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