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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM5126412800SODRH 4GB DDR3 1600MHz CL11 204-pin SODIMM memory upgrade

SKU CH-7Q1S-J7AH7

4 GB DDR3 1600 MHz CL11 SODIMM upgrade for Toshiba Satellite C855D models

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.5 V
  • 4GB capacity boosts multitasking on compatible Toshiba Satellite laptops
  • DDR3 1600MHz speed with CL11 timing delivers responsive performance
  • 204-pin SODIMM form factor fits C855D-11W and C855D-11X slots
  • 5V unbuffered non-ECC design ensures stable operation
  • Single 4GB module using major-brand chipset for reliable upgrades

System-Specific SODIMM for Toshiba Satellite

This 4 GB DDR3 SO-DIMM is built for the Toshiba Satellite C855D-11W and C855D-11X laptops. It delivers a straightforward memory upgrade for owners of those specific models who need to replace a failed module or add capacity to an available slot. The unbuffered, non-ECC design matches the original system requirements exactly.

204-pin DDR3 1600 MHz CL11 specification

The module runs at PC3-12800 speed with a CAS latency of 11 and operates at 1.5 V. These electrical and timing parameters are the single decisive match for the supported chipset. If your laptop requires a different voltage, pin count or speed grade, this stick will not function.

Direct slot installation with no heat spreader

Installation consists of opening the memory compartment, aligning the 204-pin edge connector and pressing until the retention clips engage. The low-profile design clears standard laptop chassis lids. The most common issue is inserting the module at an angle, which leaves the pins partially seated and prevents the system from booting.

How it compares

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

Price $11.99
Cheaper than about 96% 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 $3.00 per GB
Cheaper than about 90% 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 nameCM5126412800SODRH
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsToshiba Satellite C855D-11 W, C855D-11X
In the box
Included items1 Memory RAM Stick

Questions about this item

What does the DDR3-1600 rating mean once the module is installed?

The stick runs at DDR3-1600 (PC3-12800) with CL11 timing so the system reads and writes at that rated speed.

Which memory standard and pin count does this SODIMM use?

It is a 204-pin DDR3 SO-DIMM running at 1.5 V, unbuffered and non-ECC.

Will this stick fit the Toshiba Satellite C855D-11W and C855D-11X?

Yes — it is a 204-pin DDR3 SO-DIMM listed as compatible with those models.

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