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Green 240-pin DDR3 DIMM with black chips and gold contacts

Crucial

Crucial CT51272BB1067 4GB DDR3 1066 ECC Registered server RAM

SKU CH-4SZZ-JPEAJ MPN CT51272BB1067

4GB DDR3 1066 ECC registered server memory with CL7 latency and 1.50V operation

  • Total capacity4 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • ECC registered design protects data integrity in server workloads
  • DDR3 1066 speed with CL7 latency delivers responsive performance
  • 4GB dual-rank module increases memory capacity for virtualisation
  • 240-pin DDR3 form factor fits standard server DIMM slots
  • 50V operation matches platform power requirements

Server memory for registered DDR3 systems

This 4 GB Crucial module uses 240-pin DDR3 SDRAM rated at 1066 MT/s with CL7 latency and 1.50 V operation. It is built for servers and workstations that require ECC registered memory.

Capacity and headroom

The dual-ranked 512Meg x 72 organisation provides 4 GB per module so capacity scales with the number of populated slots. Registered buffering reduces electrical load on the memory controller allowing larger configurations than unbuffered DIMMs.

Thermals noise and power

Standard 1.50 V DDR3 voltage keeps power draw predictable in normal server workloads. Passive cooling via chassis airflow is sufficient as the module has no integrated fan. ECC operation adds minimal overhead while protecting data integrity.

How it compares

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

Price $57.99
Cheaper than about 82% 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 $14.50 per GB
Pricier than about 74% 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 nameCT51272BB1067
Total capacity4 GB
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Power
Rated voltage1.5 V

Questions about this item

Will this 4 GB DDR3 1066 CL7 registered ECC module work in a server that already has PC3-8500 unbuffered memory installed?

No — registered and unbuffered DIMMs cannot be mixed on the same memory bus, so this module must be used with other registered ECC DDR3 1066 modules.

How can I confirm the module is running at the rated DDR3 1066 speed and CL7 latency after installation?

Check the BIOS memory information or a tool such as CPU-Z; the SPD will show 1066 MT/s (PC3-8500) and CAS latency 7 at 1.50 V.

Does the CT51272BB1067 come with a heatsink or any installation hardware, or do I need to buy those separately?

The module is supplied as a bare 240-pin DIMM with 512Meg x 72 dual-rank chips; no heatsink, brackets or extra hardware are included.

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