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Two green DDR4 DIMMs with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM4096722133ECCR 64GB (2x32GB) DDR4 2133 ECC Registered memory upgrade

SKU CH-X40R-DXGT6

64 GB kit of two 32 GB DDR4-2133 ECC registered DIMMs validated for the Synology RackStation RS18017xs+

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Memory timings15-15-15
  • Rated voltage1.2 V
  • 64GB total capacity across two 32GB modules
  • DDR4 2133 MHz speed rated at PC4 17000
  • ECC registered design detects and corrects data errors
  • CL15 latency with 15-15-15 timing at 1.2V
  • Validated for Synology RackStation RS18017xs+ systems

Synology RS18017xs+ 64GB ECC kit

This 64GB kit contains two 32GB DDR4 2133 registered ECC DIMMs built for the Synology RackStation RS18017xs+. Each module runs at 1.2V with CL15 timing and a 2Rx4 organisation. The registered design adds a buffer that stabilises heavy memory loads on this platform.

Compatibility checklist

The RS18017xs+ accepts four DIMM slots and supports up to 128GB total capacity. Verify the unit currently uses registered ECC DDR4 at 2133MT/s before ordering. Mixing unbuffered or non-ECC modules will prevent boot or disable error correction.

Upgrade path

Adding this kit to a two-slot configuration brings the system to 64GB and leaves two slots free for future expansion to the 128GB maximum. The jump is worthwhile when virtual machines, container workloads or large file caches exceed the existing memory headroom.

How it compares

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

Price $419.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.56 per GB
Cheaper than about 60% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM4096722133ECCR
Total capacity64 GB (2 × 32 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 typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology RackStation RS18017xs+
In the box
Included items2 Memory RAM Sticks

Questions about this item

What comes in the package and do I need anything else for installation?

The kit includes two 32 GB DDR4 2133 ECC registered DIMMs. No extra parts are required if your Synology RackStation RS18017xs+ has free 288-pin slots.

Should I pick this 64 GB kit or a different capacity for the RS18017xs+?

This 64 GB (2 x 32 GB) kit fills half the four slots and leaves room to reach the 128 GB maximum later. Choose it when you want headroom without populating every slot today.

What does the DDR4 2133 CL15 rating deliver once the modules are installed in the RS18017xs+?

The system will run the memory at 2133 MHz with 15-15-15 timings at 1.2 V, providing error-correcting registered operation supported by the platform.

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