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Green 288-pin DDR4 server DIMM with black chips and silver heat spreader

Kingston Technology Corp.

Kingston Technology Corp. KSM26RD4/64MFR 64GB DDR4 2666 CL19 ECC Registered 2Rx4 288-pin server RAM

SKU CH-1S0J-GWFNW MPN KSM26RD4/64MFR

64 GB DDR4-2666 ECC registered dual-rank DIMM with CL19 latency and 1.20 V operation for server workloads

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • Buffer typeRegistered

Capacity 64GB

Rank 2Rx4

Model Micron

  • 64GB capacity handles heavy server workloads
  • DDR4 2666 speed delivers 2666 MT/s data rate
  • CL19 latency ensures responsive memory access
  • ECC registered design protects data integrity
  • 288-pin 2Rx4 module fits registered DIMM slots

Server DDR4 ECC Registered module

This 64 GB DDR4 DIMM is built for enterprise servers and workstations that require registered, error-correcting memory. It operates at 2666 MHz with a CL19 latency profile and runs at the standard 1.20 V. The dual-rank 2Rx4 organisation fits 288-pin DDR4 slots in compatible platforms.

Registered signal and ECC support

Registered buffering reduces electrical load on the memory controller, allowing higher module counts per channel. ECC detects and corrects single-bit errors, protecting data integrity in mission-critical workloads. The CL19 timing at 2666 MHz meets the PC4-21300 specification for stable throughput.

Single 64 GB stick for density

Supplied as a single 64 GB module, it maximises capacity per slot and simplifies population rules on boards with limited DIMM sockets. No additional accessories, cables or software licences are included in the package.

How it compares

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

Price $1,152.99
Pricier than about 81% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $18.02 per GB
Pricier than about 79% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameKingston
Model nameKSM26RD4/64MFR
Total capacity64 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.2 V
Size & build
Shipping weight0.09 kg
Package size140 × 43 × 8 mm

Other versions of this model

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Questions about this item

How does 64 GB in a single 2Rx4 module behave in a real server?

The dual-rank 2Rx4 organisation lets the memory controller interleave across ranks inside one DIMM, so a single 64 GB stick can keep all channels populated without sacrificing density.

What does the DDR4-2666/PC4-21300 rating limit in practice?

The module is specified at 2666 MT/s with CL19-19-19 timing; the registered buffer adds one cycle of address/command delay, so sustained bandwidth tops out at the PC4-21300 ceiling.

What physical slot and keying does the 288-pin DIMM need?

It plugs into a standard 288-pin DDR4 RDIMM socket with the DDR4 notch position; the registered buffer and 1.20 V operation are handled by the slot’s wiring.

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