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Green circuit board with black memory chips and gold edge connectors

SAMSUNG

SAMSUNG M391B5673FH0-CF8 2GB DDR3-1066 240-Pin memory upgrade

SKU CH-0DFF-Z3CBW

2GB DDR3-1066 dual-rank 240-pin server memory module for system-specific upgrades

  • 2GB DDR3-1066 capacity for server workloads
  • Dual-rank 2Rx8 organisation improves memory throughput
  • PC3-8500E rating matches 1066 MT/s system buses
  • 240-pin DIMM form factor fits standard server slots
  • Samsung manufacture ensures component-level reliability

System-specific DDR3 server module

This 2 GB DDR3-1066 module uses a 240-pin form factor and a dual-rank 2Rx8 organisation. It is built for servers and workstations that require PC3-8500E registered ECC memory. The Samsung part number M391B5673FH0-CF8 identifies the exact specification.

Steady throughput under load

Dual-rank construction allows the memory controller to interleave accesses across both ranks, sustaining bandwidth during prolonged workloads. Registered buffering reduces electrical load on the bus, helping stability when all slots are populated. The PC3-8500E rating guarantees 1066 MT/s operation at standard timings.

Straightforward slot installation

Align the notch with the key in the 240-pin DIMM socket and press firmly until the retention clips engage. The module height follows the standard DDR3 profile, so it fits most server chassis air-flow paths. A common issue is mixing registered and unbuffered DIMMs, which prevents the system from posting.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 90% of the 21,161 comparable items (median $397.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How much heat does the DDR3-1066 module generate when running continuously in a server?

Standard DDR3 server modules operate within JEDEC thermal limits; typical power draw is low enough that normal chassis airflow keeps temperatures in spec.

Does this 240-pin DIMM need ECC support on the motherboard to function?

The module is an ECC-registered (PC3-8500E) part; it requires a motherboard and chipset that support registered ECC DDR3 memory.

Can I mix this dual-rank PC3-8500E stick with older single-rank DDR3 modules in the same channel?

Mixing ranks is possible if the platform supports it, but the memory controller will run all modules at the slowest common speed and timing.

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