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Two green DDR4 UDIMM sticks, no heat spreader, gold contacts, 288-pin

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR4 2666 ECC Unbuffered UDIMM CL19 1.2V 288-pin Synology RS2821RP+

SKU CH-YGMV-PN833

ECC unbuffered DDR4 kit adds 32 GB across two 16 GB modules at 2666 MT/s with CL19 timing for the Synology RS2821RP+ NAS

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity with error-correcting DDR4 technology
  • 32 GB kit expands NAS capacity using two 16 GB modules
  • 2666 MHz speed matches Synology RS2821RP+ specifications for stable operation
  • 2 V low voltage reduces power draw and heat in rackmount enclosures
  • 288-pin UDIMM form factor fits directly into compatible Synology memory slots

32GB DDR4 ECC Kit for Synology RS2821RP+

This 32GB kit contains two 16GB DDR4 2666 modules built for the Synology RackStation RS2821RP+. ECC unbuffered UDIMM design adds error correction for data integrity in NAS workloads. CL19 latency and 1.2V operation match the platform specifications. The 288-pin form factor fits the system memory slots directly.

Replaces lower-capacity or non-ECC modules

Upgrading from smaller DIMMs or standard memory adds both capacity and error correction in one step. The jump is worth it when the NAS runs virtual machines, containers or ZFS pools that benefit from extra headroom and corrected single-bit errors. Existing 16GB or 8GB sticks can be removed to make room for this matched pair.

Fits the RS2821RP+ memory slots

Two UDIMM slots accept this 2Rx8 kit without adapters or risers. No heat spreader means clearance stays minimal inside the rack chassis. The kit frees the installer from mixing speeds or ranks because both modules are validated together. Remaining expansion depends on the number of slots the mainboard provides.

How it compares

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

Price $234.99
Cheaper than about 57% 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 $7.34 per GB
Cheaper than about 55% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered UDIMM
Part numberME21300-628K2
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items32 GB (2 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

Does the 288-pin DDR4 UDIMM fit the Synology RS2821RP+ memory slots?

Yes, the 288-pin DDR4 ECC UDIMM form factor matches the memory slots on the Synology RS2821RP+ NAS.

What is the correct orientation step when installing the 2Rx8 modules?

Align the notch on each 288-pin module with the slot key, then press firmly until the retention clips click on both sides.

Will the 1.2V DDR4 2666 modules need any firmware update after installation?

No firmware update is required; the NAS detects the 32GB kit at 2666MHz automatically on boot.

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