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Two green 204-pin DDR3 SODIMM modules with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 8GB DDR3 1066MHz CL7 SODIMM 2x4GB memory upgrade

SKU CH-MJHS-E637D

8GB DDR3 SODIMM kit at 1066 MHz CL7 for select Compaq Presario CQ56 and CQ57 notebooks

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8 GB total capacity from two 4 GB modules for everyday multitasking
  • DDR3 1066 MHz CL7 timing delivers responsive performance for compatible notebooks
  • Guaranteed fit with listed Compaq Presario CQ56 and CQ57 models
  • Unbuffered non-ECC 204-pin SO-DIMM installs without configuration
  • 5 V operation matches standard laptop power requirements

8GB DDR3 1066MHz kit for Compaq Presario

This 8GB kit supplies two 4GB DDR3 SO-DIMMs rated at 1066MHz with CL7 timing. It targets owners of listed Compaq Presario CQ56 and CQ57 notebooks who need a straightforward memory upgrade. The modules are unbuffered, non-ECC and run at 1.5V.

Sustained load behaviour

At the rated 1066MHz speed and 7-7-7 timings the modules maintain consistent throughput during extended sessions. The major-brand chipset and 2Rx8 organisation help keep latency stable when the system runs memory-intensive tasks for long periods. No heat spreader is fitted.

Upgrade context

The kit replaces the factory-installed memory in compatible CQ56 and CQ57 models, doubling capacity to 8GB where the original configuration was lower. The jump is worthwhile when the notebook struggles with multitasking or larger datasets. Buyers needing more than 8GB or a different DDR generation cannot use this kit.

How it compares

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

Price $39.99
Cheaper than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM512648500SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsCompaq Presario Cq57-229Wm, Cq57-250Sv, Cq56-115Dx
In the box
Included items2 Memory RAM Sticks

Questions about this item

How much power does the 1.5V DDR3 kit draw when the laptop runs all day?

The modules run at the standard 1.5V DDR3 voltage, so power draw stays within the notebook's normal memory budget during extended use.

Does my Compaq Presario CQ56-115DX need any extra parts to use these 204-pin SODIMMs?

No extra parts are required; the kit plugs directly into the two SODIMM slots already present in the CQ56-115DX.

Will the CL7 timing work alongside the original 1066MHz sticks already in my CQ57-229WM?

Yes, the CL7 7-7-7 timing matches the 1066MHz specification, so the new pair will run in step with any existing PC3-8500 modules.

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