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Green 240-pin DDR3 UDIMM module with black chips, single 4GB stick

Simmtec, Inc

Simmtec, Inc 4GB DDR3-1066 PC3-8500 2Rx8 1.5V UDIMM desktop RAM

SKU CH-Q6W5-7VZ88

A 4 GB DDR3 desktop module running at 1066 MHz with PC3-8500 bandwidth, 240-pin UDIMM form factor and dual-voltage 1.35 V / 1.5 V operation

  • Capacity4GB
  • SpeedDDR3 1066 (PC3 8500)
  • Adds 4 GB of system memory for smoother multitasking
  • Runs at 1066 MHz DDR3 speed with PC3-8500 bandwidth
  • Dual-voltage design operates at 1.5 V or 1.35 V for flexible compatibility
  • 240-pin UDIMM form factor fits standard desktop DIMM slots
  • Built with major-brand chips meeting JEDEC standards for reliable operation

4GB DDR3-1066 UDIMM for desktop PCs

This 4GB unbuffered DIMM runs at DDR3 1066 (PC3-8500) and is built for older desktop platforms that still use 240-pin DDR3 slots. It suits repair jobs, budget upgrades or secondary systems where capacity matters more than speed.

DDR3 1066 speed and 2Rx8 organisation

The module operates at 1066 MT/s with a 2Rx8 chip layout, delivering PC3-8500 bandwidth. Match this exact speed and rank configuration to the motherboard specification; faster or differently ranked DDR3 may not post or may down-clock unpredictably.

Standard 240-pin UDIMM installation

Align the notch with the slot key, press firmly until the side clips click, and verify seating before powering on. Common issues include mixing this 1.5 V module with 1.35 V-only boards or populating slots in the wrong channel order, both of which can prevent boot.

Highlights

  • Adds 4 GB of system memory for smoother multitasking
  • Runs at 1066 MHz DDR3 speed with PC3-8500 bandwidth
  • Dual-voltage design operates at 1.5 V or 1.35 V for flexible compatibility
  • 240-pin UDIMM form factor fits standard desktop DIMM slots
  • Built with major-brand chips meeting JEDEC standards for reliable operation

Specifications

Capacity4GB
SpeedDDR3 1066 (PC3 8500)

Questions about this item

What does the 1066 MHz rating mean once the module is installed in a desktop?

The module will run at up to 1066 MT/s, delivering a PC3-8500 data rate when the memory controller is set to that speed.

How does the DDR3 interface limit performance with this stick?

DDR3 tops out at the JEDEC 1066 standard here, so bandwidth is capped at the PC3-8500 level regardless of faster CPU support.

What physical slot and clearance does the 240-pin UDIMM need?

It fits a standard 240-pin DDR3 DIMM socket and requires the usual UDIMM height clearance in the chassis.

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