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Single green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM5126412800SOSRH 4GB DDR3 1600MHz SODIMM memory upgrade

SKU CH-X42B-F163R

4 GB DDR3 1600 MHz SODIMM module validated for Synology RS815RP+ systems

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.5 V
  • 4GB capacity adds responsive multitasking headroom
  • DDR3 1600 MHz speed keeps data moving quickly
  • CL11 1.5V timing balances latency and stability
  • 204-pin SODIMM fits Synology RS815RP+ slots directly
  • Single 4GB module simplifies upgrade to 6GB max

System-Specific 4 GB DDR3 SODIMM

This 4 GB DDR3 1600 MHz SODIMM is built for the Synology RackStation RS815RP+. It runs at CL11 1.5 V unbuffered and uses a 204-pin layout with a single 1Rx8 rank. The module is new and carries a limited lifetime warranty from Computer Memory Solutions.

Upgrade for RS815RP+ NAS units

The RS815RP+ ships with a maximum of 6 GB across two slots, so adding this stick raises usable memory toward that ceiling. The jump is worth it when the unit runs multiple packages or Docker containers that exceed the factory configuration. Buyers who need more than 6 GB total cannot use this platform.

Straightforward slot installation

Power down the NAS, open the chassis, and press the module into the empty SODIMM slot until the latches click. The only common issue is mixing ECC and non-ECC sticks, which this unit does not support; keep both slots non-ECC. No heat spreader is present, so airflow over the PCB is required.

How it compares

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

Price $10.99
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 $2.75 per GB
Cheaper than about 91% 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 nameCM5126412800SOSRH
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 rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsSynology Rackstation ?Rs815Rp+
In the box
Included items1 Memory RAM Stick

Questions about this item

Will the 204-pin DDR3 SODIMM fit the RS815RP+ memory slot?

Yes, the module uses the standard 204-pin DDR3 SODIMM form factor that matches the RS815RP+ slots.

Which way round does the notch on the 204-pin stick go when inserting it?

Align the off-centre notch with the key in the slot; press firmly at both ends until the side clips click shut.

Does the 1.5V CL11 module need any firmware update or pairing after installation?

No firmware step is required; the RS815RP+ detects the 4GB stick automatically on boot.

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