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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM5126412800SOSRH 4GB DDR3 1600 SO-DIMM memory upgrade

SKU CH-74DF-1F85C

4GB DDR3 1600 SO-DIMM module validated for Synology RackStation RS815+ with CL11 timing and 1.5V operation

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.5 V
  • 4 GB capacity expands Synology RackStation RS815+ memory
  • 1600 MHz DDR3 speed matches system specification
  • CL11 latency supports stable operation at rated frequency
  • 5 V unbuffered SO-DIMM fits the 204-pin slot
  • Single 4 GB module leaves one socket free for future upgrade

Synology RS815+ memory upgrade

This 4 GB DDR3 SO-DIMM is built for the Synology RackStation RS815+. It runs at 1600 MHz with CL11 timing and 1.5 V unbuffered operation. The single 204-pin module adds capacity to one of the two available slots.

Sustained load behaviour

The module maintains its rated 1600 MHz speed and 11-11-11 timings during continuous read and write cycles. Unbuffered architecture keeps latency low for the NAS workloads the RS815+ handles. Non-ECC design suits the platform's supported configuration.

Thermals noise and power

Without a heat spreader the stick relies on the chassis airflow of the RS815+. Operating at 1.5 V keeps power draw modest for a DDR3 SO-DIMM. Silent operation is assured because the component has no moving parts.

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 Rs815+
In the box
Included items1 Memory RAM Stick

Questions about this item

How much power does the 1.5 V DDR3 1600 module draw when the Synology RS815+ runs continuously?

The module operates at the standard DDR3 voltage of 1.5 V; actual power draw depends on the RS815+ memory controller and workload, so consult the NAS documentation for system-level figures.

What must the Synology RackStation RS815+ already have installed for this 204-pin SO-DIMM to work?

The RS815+ needs at least one free SO-DIMM slot and a BIOS that supports non-ECC unbuffered DDR3 1600 memory; the system ships with two slots and a 6 GB maximum.

Will this CL11 1Rx8 stick run correctly alongside the original memory already in my RS815+?

Yes — the module matches the RS815+ spec for DDR3 1600 non-ECC unbuffered SO-DIMM, so it will operate at the system’s default speed and timings when paired with the factory memory.

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