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Green rectangular circuit board with gold edge connector and black memory chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 4GB DDR3 1066 CL7 SODIMM memory upgrade

SKU CH-Y48X-AG721

4GB DDR3 1066 CL7 SODIMM for Toshiba Satellite C655D-S5515 and C655D-S5511 laptops

  • Total capacity4 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 4GB capacity upgrades your Toshiba Satellite C655D
  • DDR3 1066 speed matches system specification
  • CL7 timing delivers responsive data access
  • 204-pin SODIMM fits the laptop memory slot
  • Unbuffered non-ECC design suits consumer notebooks

4 GB DDR3 1066 SO-DIMM for Satellite C655D

This 4 GB DDR3 1066 CL7 SO-DIMM is built specifically for the Toshiba Satellite C655D-S5515 and C655D-S5511 notebooks. It uses a 204-pin unbuffered layout with 2Rx8 organisation and runs at 1.5 V. The module adds a single 4 GB stick to systems that accept up to 8 GB total across two sockets.

Steady throughput at CL7 7-7-7 timings

At the rated 1066 MHz speed the stick keeps its 7-7-7 timings during extended workloads rather than relaxing after a short burst. The major-brand chipset and 256 x 8 chip configuration sustain the PC3-8500 data rate without throttling. This behaviour helps older Satellite chassis that lack aggressive cooling.

Slim profile fits tight SODIMM slots

No heat spreader means the board stays at the standard SO-DIMM height, so it slides into the Satellite's stacked slots without clearance issues. The 204-pin edge connector matches the factory keying exactly. Buyers needing more than 4 GB per socket or wanting ECC registered memory will need a different module.

How it compares

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

Price $19.99
Cheaper than about 91% 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 $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM512648500SODRH
Total capacity4 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 systemsToshiba Satellite C655D-S5515, C655D-S5511
In the box
Included items1 Memory RAM Stick

Questions about this item

Does the 1.5 V DDR3 1066 module run cool enough for all-day use in a Toshiba Satellite C655D?

The 1.5 V DDR3 1066 SO-DIMM is an unbuffered, non-ECC design without a heat spreader; its low voltage and standard JEDEC timings keep heat output modest during continuous operation in the supported Satellite C655D-S5515 or C655D-S5511.

My Satellite C655D has two SODIMM slots — can I install this 4 GB stick alongside the existing module?

Yes, the laptop accepts up to 8 GB total across two sockets with a 4 GB per-socket limit, so a single 4 GB PC3-8500 CL7 stick works in either slot and leaves the second free for another 4 GB module.

Will this PC3-8500 CL7 stick work if the other slot still holds the factory 1066 MHz memory?

The module runs at DDR3 1066 with 7-7-7 timing at 1.5 V, matching the factory specification for the C655D series, so it will operate in dual-channel mode with an identical-speed stick already installed.

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