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Green circuit board 204-pin DDR3 SODIMM module with black memory chips

OWC

OWC 2GB DDR3 1066 PC3-8500 CL7 1Rx8 204-pin 1.5V Non-ECC SODIMM HP CQ58

SKU CH-EFMB-RV2M3

A 2GB DDR3 1066MHz SODIMM module designed to upgrade HP CQ58 series laptops with CL7 latency and 1.5V operation

  • Capacity2GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Voltage1.5V
  • ECCNo
  • Boosts HP CQ58 responsiveness with a 2 GB DDR3 1066 MHz module
  • JEDEC and RoHS compliant for a warranty-safe upgrade
  • CL7 latency and 1.5 V voltage match original system specs
  • Single 1Rx8 rank 204-pin SODIMM fits the laptop slot directly
  • Designed and tested to meet or exceed OEM requirements

Targeted laptop upgrade

This OWC module is a 2GB DDR3 SODIMM built specifically for the HP CQ58 series. It runs at 1066MHz with CL7 latency and 1.5V operation. The unbuffered, non-ECC design matches the original factory specification for these notebooks.

Check your current configuration

Verify that your HP CQ58 uses DDR3 memory before ordering. Confirm the laptop has a free 204-pin slot or that you are replacing an existing module. The system must accept 1Rx8 rank organisation and PC3-8500 speed for correct operation.

Build and daily handling

The module uses a standard green PCB without a heat spreader, keeping the profile low for tight laptop chassis. Gold edge contacts resist oxidation during repeated seatings. JEDEC and RoHS compliance ensure the upgrade is warranty-safe for everyday use.

Highlights

  • Boosts HP CQ58 responsiveness with a 2 GB DDR3 1066 MHz module
  • JEDEC and RoHS compliant for a warranty-safe upgrade
  • CL7 latency and 1.5 V voltage match original system specs
  • Single 1Rx8 rank 204-pin SODIMM fits the laptop slot directly
  • Designed and tested to meet or exceed OEM requirements

Specifications

BrandOWC
Part Number8S5D31R802GB
Capacity2GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1066 (PC3 8500)
CAS LatencyCL7
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemHP CQ58 Series using DDR3 Memory

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Questions about this item

What comes in the box with the OWC 2GB DDR3 1066 SODIMM and is anything else needed to install it in an HP CQ58?

The package contains a single 2GB DDR3 1066 PC3-8500 CL7 1Rx8 204-pin 1.5V Non-ECC SODIMM module. No extra parts or tools are required for installation in a compatible HP CQ58 laptop.

How do I decide between the available capacities for this DDR3 1066 upgrade?

This listing is for the 2GB module only. If your HP CQ58 has two slots you can add a second identical 2GB stick for 4GB total, or replace the existing module if only one slot is free.

What does the PC3-8500 1066MHz CL7 rating actually deliver once the module is running in the laptop?

The module runs at 1066MHz with CAS latency 7 at 1.5V, matching the JEDEC DDR3 standard for PC3-8500. This gives the HP CQ58 the rated bandwidth and timing the chipset expects for stable operation.

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