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Two green DDR4 RDIMM sticks with gold contacts and black chips

RIMLANCE

RIMLANCE RRD21300DD4C2K256 256GB (2x128GB) DDR4 2666 ECC Registered RDIMM Server RAM

SKU CH-WWXV-JYP00

Dual 128 GB DDR4 2666 ECC registered RDIMM kit delivering 256 GB capacity with CL19 latency and 1.2 V operation

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Buffer typeRegistered
  • Memory rank2S2RX4
  • 256 GB total capacity with two 128 GB modules for large server workloads
  • DDR4 2666 speed rated at PC4-21300 for high-throughput data transfer
  • ECC registered design detects and corrects memory errors to protect data integrity
  • 2S2RX4 dual-rank organisation using major-brand DRAM chips for stable operation
  • CL19 latency at 1.2 V operation balances responsiveness with power efficiency

Capacity & Configuration

This 256GB kit comprises two 128GB DDR4 registered DIMMs built for servers and workstations that require ECC protection. The modules use a 2S2RX4 organisation and major-brand DRAM chips to deliver stable operation under sustained workloads.

DDR4 2666 Registered Limits

The DDR4 2666 interface caps bandwidth at the PC4-21300 rate and requires a platform that supports registered ECC memory. Consumer desktop chipsets and unbuffered-only boards cannot use these modules, so the upgrade path ends at the server or workstation socket.

256GB Headroom

Two ranks per DIMM at 128GB each fill high-capacity slots efficiently, leaving room for additional kits on multi-channel server boards. Workloads that exceed 256GB per channel or demand speeds beyond 2666 MT/s will need faster or larger modules on a compatible platform.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,665.99
Pricier than about 84% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.51 per GB
Cheaper than about 58% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameRIMLANCE
Model nameRRD21300DD4C2K256
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2S2RX4

Questions about this item

Should I choose the 256 GB kit with two 128 GB modules or a different capacity?

This kit provides 256 GB total using two 128 GB RDIMMs. Select it when your server needs that exact capacity and has two free DDR4 slots.

What does the 2666 MHz speed mean once the memory is installed in a server?

The modules run at DDR4 2666 (PC4 21300), delivering up to 21 300 MB/s theoretical bandwidth per module when the platform supports that data rate.

How does the 288 pin DDR4 registered ECC interface affect compatibility and performance limits?

The 288 pin registered DDR4 ECC design requires a server or workstation chipset that supports registered memory; it will not work in standard desktop boards and caps speed at the platform's maximum DDR4 2666 capability.

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