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Green 240-pin DDR2 server module with heat spreader

Crucial

Crucial CT12872AF667 1GB DDR2 667 ECC Fully Buffered Server RAM

SKU CH-55WM-H4Q55 MPN CT12872AF667

1GB DDR2 667 ECC fully buffered server memory with CL5 timing and heat spreader

  • Total capacity1 GB
  • Rated speedDDR2 667 (PC2 5300)
  • CAS latencyCL5
  • Memory timings5-5-5-12
  • Rated voltage1.8 V
  • Buffer typeFully Buffered
  • 1GB capacity for DDR2 server workloads
  • Fully buffered ECC protects data integrity
  • 667 MHz speed with CL5 latency
  • 240-pin DDR2 SDRAM form factor
  • 80 V operation for power efficiency

1GB DDR2 Fully Buffered Module

This 1GB DDR2 module is built for servers that require fully buffered ECC memory. It runs at 667 MHz with a CAS latency of CL5 and operates at 1.80V. The 240-pin form factor fits compatible DDR2 server platforms.

Suited for legacy server maintenance

This module suits administrators maintaining older DDR2 servers that specifically call for fully buffered ECC DIMMs. It is not for builders working with unbuffered or registered DDR2 systems, nor for any platform that uses a different memory generation.

Capacity and headroom

The single 1GB stick provides a modest capacity bump for supported configurations. It handles light server workloads and basic virtualization within that limit. Larger datasets or multi-VM environments will exhaust the available memory quickly.

How it compares

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

Price $42.99
Cheaper than about 86% of the 6,523 comparable items (median $188.99).
Total capacity 1 GB
Lower than about 99% of the 6,064 comparable items (median 32 GB).
Price per GB $42.99 per GB
Pricier than about 90% 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 nameCrucial
Model nameCT12872AF667
Total capacity1 GB
Product type240-Pin DDR2 SDRAM
Performance
Rated speedDDR2 667 (PC2 5300)
Memory
CAS latencyCL5
Memory timings5-5-5-12
ECC supportYes
Buffer typeFully Buffered
Heat spreaderYes
Power
Rated voltage1.8 V
Size & build
Shipping weight0.09 kg
Package size165 × 71 × 10 mm

Questions about this item

What motherboard slot and chipset are required for this 240-pin DDR2 667 fully buffered ECC module?

The module fits a 240-pin DDR2 socket and needs a chipset that supports fully buffered ECC DDR2 667 (PC2 5300) at 1.80 V with CL5 5-5-5-12 timing.

Will this CT12872AF667 run at its rated speed if the server currently uses DDR2 667 registered (not fully buffered) memory?

No, fully buffered and registered DDR2 use different electrical interfaces and cannot be mixed; the system must support fully buffered DIMMs.

How can I confirm the module is operating at DDR2 667 with ECC active after installation?

Check the BIOS memory information or OS hardware report for 667 MT/s, CL5 5-5-5-12 timings, 1.80 V and ECC enabled status.

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