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Two green DDR3 desktop memory modules with gold contacts

Simmtec, Inc

Simmtec, Inc 4GB (2x2GB) DDR3-1066 PC3-8500 2Rx8 desktop RAM

SKU CH-SS4W-FD28F

A 4 GB DDR3 desktop memory kit running at 1066 MHz PC3-8500 with two 2 GB unbuffered non-ECC modules at 1.5 V

  • Capacity4GB (2 x 2GB)
  • SpeedDDR3 1066 (PC3 8500)
  • 4 GB total capacity from two 2 GB modules for basic multitasking
  • 1066 MT/s DDR3 speed rated at PC3-8500 for responsive data transfer
  • 240-pin UDIMM form factor fits standard desktop DIMM slots
  • 2Rx8 dual-rank organisation improves memory controller efficiency
  • 5 V operating voltage matches JEDEC DDR3 specification

Desktop DDR3 Kit for Older Systems

This 4GB kit contains two 2GB unbuffered UDIMM modules built to the DDR3-1066 standard. It targets owners of legacy desktop platforms that require 240-pin memory running at 1.5V without ECC support.

Speed Rating Decides Compatibility

The modules operate at DDR3 1066 (PC3 8500) with a 2Rx8 organisation. Your motherboard must explicitly support this exact speed and density; faster or slower DDR3 kits will not substitute correctly.

Straightforward 240-Pin Installation

Align the notch on each module with the slot key and press firmly until the retention clips click. The most common issue is mixing these sticks with modules of a different voltage or rank, which prevents the system from posting.

Highlights

  • 4 GB total capacity from two 2 GB modules for basic multitasking
  • 1066 MT/s DDR3 speed rated at PC3-8500 for responsive data transfer
  • 240-pin UDIMM form factor fits standard desktop DIMM slots
  • 2Rx8 dual-rank organisation improves memory controller efficiency
  • 5 V operating voltage matches JEDEC DDR3 specification

Specifications

Capacity4GB (2 x 2GB)
SpeedDDR3 1066 (PC3 8500)

Questions about this item

What does the DDR3-1066 speed mean once the modules are installed?

The kit runs at 1066 MT/s, giving a peak bandwidth of PC3-8500. Your motherboard will set the exact rate at boot, so the modules operate at or below that ceiling.

How does the 240-pin UDIMM interface limit what the memory can do?

The 240-pin unbuffered DIMM slot carries only standard DDR3 signals. It cannot support registered, ECC or higher-voltage modules, so the kit is capped at non-ECC 1.5 V operation.

What physical space and power does the 2Rx8 kit need to fit?

Each stick is a standard-height 240-pin UDIMM that draws 1.5 V. Two adjacent desktop DIMM slots are required, with enough clearance for the module height.

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