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Green circuit board SODIMM with black memory chips, 200-pin DDR2 laptop memory module

Computer Memory Solutions

Computer Memory Solutions CM512646400SO 4GB DDR2 800MHz SODIMM

SKU CH-HP46-GQG5G

4GB DDR2 800MHz SODIMM for HP/Compaq G56-129WM notebooks, CL6 1.8V unbuffered

  • Total capacity4 GB
  • Rated speedDDR2 800 (PC2 6400)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL6
  • Memory timings6-6-6
  • Rated voltage1.8 V
  • 4 GB capacity adds responsive multitasking headroom
  • DDR2 800 MHz speed matches notebook memory bus
  • CL6 1.8 V timing keeps power draw low
  • 200-pin SODIMM form factor fits HP G56-129WM slot
  • Lifetime exchange warranty covers manufacturing defects

Targeted DDR2 Notebook Upgrade

This 4 GB DDR2 800 MHz SODIMM module is built for the HP/Compaq G Notebook G56-129Wm. It delivers a single 200-pin stick rated at PC2-6400 with CL6 timing and 1.8 V operation. The unbuffered non-ECC design matches the original specification for a direct slot replacement.

Suitable for Capacity-Limited Owners

Owners of the G56-129Wm seeking the maximum supported memory will find this 4 GB module appropriate. Buyers needing more than 4 GB total capacity or those using a 32-bit operating system should look elsewhere, as the platform limits usable memory to roughly 3.5 GB without a 64-bit OS.

DDR2 200-Pin SODIMM Form Factor

The module uses the 200-pin DDR2 SO-DIMM interface required by the compatible notebook. Only systems accepting DDR2 800 MHz unbuffered memory at 1.8 V can use this part; any other memory generation or pin count will not fit the slot.

How it compares

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

Price $51.99
Cheaper than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $13.00 per GB
Pricier than about 59% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM512646400SO
Total capacity4 GB
Product type200-Pin DDR2 SO-DIMM
Performance
Rated speedDDR2 800 (PC2 6400)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL6
Memory timings6-6-6
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Compatible systemsHp/Compaq G Notebook G56-129Wm
In the box
Included items1 Memory RAM Stick

Questions about this item

Does the 1.8 V DDR2 module run hotter or draw more power than lower-voltage RAM during all-day use?

At 1.8 V the stick uses the standard DDR2 voltage, so its heat output and power draw match other DDR2-800 modules under continuous load.

My HP G56-129WM has two SODIMM slots — do I need anything else to install this 200-pin stick?

The notebook provides two 200-pin DDR2 sockets; you only need a small screwdriver to open the memory door and seat the module.

If I keep the original 2 GB stick and add this 4 GB module, will the G56-129WM recognise the full 6 GB?

With a 32-bit OS the system caps usable memory at 4 GB; a 64-bit OS is required to address the full 6 GB across both slots.

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