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Two green DDR4 DIMM sticks with black chips no heat spreader

Computer Memory Solutions

Computer Memory Solutions 32GB (2x16GB) DDR4-2133 ECC Unregistered DIMM C135

SKU CH-RR28-0S09R

32 GB dual-channel DDR4-2133 ECC kit validated for Synology RS3617xs+ NAS

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Memory timings15-15-15
  • Rated voltage1.2 V
  • ECC protection prevents data errors in critical workloads
  • 32GB kit (2×16GB) doubles the RS3617xs+ base capacity
  • DDR4-2133 CL15 timing matches the system specification
  • 2V unbuffered DIMM fits the four 288-pin slots
  • Guaranteed compatibility with Synology RackStation RS3617xs+

Synology RS3617xs+ ECC kit

This 32 GB kit contains two 16 GB DDR4-2133 ECC unregistered DIMMs built for the Synology RackStation RS3617xs+. It adds half the system maximum of 64 GB across the four available slots. The modules run at 1.2 V with CL15 timing and use major-brand chips.

ECC unregistered requirement

The RS3617xs+ requires ECC non-registered DDR4; registered or non-ECC modules will not work. This kit matches the exact specification with 288-pin DDR4-2133 (PC4-17000) CL15 2Rx8 chips at 1.2 V. Buyers needing registered memory or a different voltage cannot use this product.

Straightforward slot installation

Power down the unit, open the chassis and insert each DIMM into an empty slot until the latches click. No heat spreaders are fitted, so clearance is rarely an issue. The common mistake is mixing registered or non-ECC sticks, which 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 $141.99
Cheaper than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $4.44 per GB
Cheaper than about 82% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048722133ECCNRD
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
Memory timings15-15-15
ECC supportYes
Buffer typeUnregistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology RackStation RS3617xs+
In the box
Included items2 Memory RAM Sticks

Questions about this item

How does the 2133 MHz speed affect real-world performance in the Synology RS3617xs+?

The modules run at the platform's native DDR4-2133 rate, so the NAS can use the full 32 GB kit without down-clocking or compatibility issues.

What does the PC4-17000 rating mean for bandwidth on this system?

PC4-17000 is the peak transfer rate for DDR4-2133; the four-slot RS3617xs+ can utilise that bandwidth across all populated channels.

Will the 288-pin DIMMs fit the four memory slots in the RS3617xs+?

Yes, each stick is a standard 288-pin DDR4 DIMM and the RS3617xs+ provides four such slots for a maximum of 64 GB.

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