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Green rectangular DDR3 DIMM with black chips and gold contacts

Axiom

Axiom 672631-B21-AX 16GB DDR3-1600 ECC Registered server RAM

SKU CH-1G4B-TJRHR MPN 672631-B21-AX

16 GB DDR3-1600 ECC registered DIMM adds reliable capacity to compatible servers

  • Total capacity16 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • Buffer typeRegistered
  • Product type240-Pin DDR3 SDRAM
  • 16 GB DDR3-1600 capacity for high-density server workloads
  • ECC registered design detects and corrects data errors
  • 240-pin RDIMM form factor fits compatible DDR3 slots
  • PC3-12800 speed rating delivers 1600 MHz bandwidth
  • Qualified for HP Gen 8 systems using part numbers 672631-B21 684031-001 672612-081

Capacity and Speed

This Axiom server memory module provides 16GB of capacity and operates at DDR3 1600 (PC3 12800). It is built as a 240-pin RDIMM for systems requiring registered ECC memory.

Target Use Cases

This module suits administrators upgrading compatible HP Gen 8 servers that require registered ECC DDR3 memory. Buyers needing unbuffered UDIMMs or non-ECC memory for workstation or desktop platforms cannot use this part.

Form Factor and Protocol

The memory uses a 240-pin DDR3 interface with registered signal buffering and ECC error correction. Verify that your server platform specifically supports registered DDR3 RDIMMs before purchase.

How it compares

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

Price $107.99
Cheaper than about 66% 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 $6.75 per GB
Cheaper than about 56% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameAxiom
Model name672631-B21-AX
Total capacity16 GB
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
ECC supportYes
Buffer typeRegistered
Size & build
Shipping weight0.09 kg
Package size152 × 76 × 25 mm

Questions about this item

Does this 240-pin DDR3-1600 RDIMM need a motherboard slot that accepts registered ECC memory?

Yes, the module is registered and ECC-enabled, so the system must support registered ECC DIMMs in its 240-pin DDR3 slots.

Can I keep this 16 GB Axiom 672631-B21-AX module installed while adding other DDR3 registered DIMMs of different capacities?

The module follows the DDR3-1600 PC3-12800 registered ECC specification; mixing capacities is possible when the platform allows mixed-capacity registered populations.

How can I confirm the 16 GB DDR3-1600 ECC registered stick is recognised at the correct speed after installation?

Check the BIOS or OS memory report — it should show 16 GB at 1600 MHz PC3-12800 with ECC active.

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