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Green 288-pin DDR4 RDIMM module with black chips

A-Tech

A-Tech 16GB DDR4 2666 ECC RDIMM 1Rx4 Cisco UCS-MR-X16G1RS-H 15-105079-01 Server RAM

SKU CH-PKV6-MSM85

16 GB DDR4 2666 ECC RDIMM 1Rx4 registered server memory module for Cisco UCS

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • 16 GB DDR4 2666 MHz capacity handles heavier server workloads
  • ECC RDIMM registered design detects and corrects single-bit errors
  • 1Rx4 single-rank layout keeps electrical loading low per channel
  • 2 V standard DDR4 voltage reduces power draw under load
  • 288-pin DIMM form factor fits Cisco UCS-MR-X16G1RS-H slots

Capacity and Compatibility

This 16GB DDR4 2666 ECC RDIMM is a registered server memory module built for Cisco UCS systems matching part numbers UCS-MR-X16G1RS-H and 15-105079-01. It targets administrators upgrading compatible Cisco UCS servers or workstations that require registered ECC memory. Buyers needing unbuffered UDIMMs or non-ECC memory for consumer desktop platforms cannot use this module.

DDR4 2666 Registered Limits

The module operates at DDR4 2666 speed with a CAS latency of CL19 and runs at the standard 1.20V voltage for DDR4. As a registered DIMM, it places a lighter electrical load on the memory controller, which is necessary for the multi-DIMM-per-channel configurations common in servers. Systems that only accept unbuffered memory or that are limited to lower DDR4 speeds will not support this module at its rated specification.

Build and Connector Details

The stick uses a 288-pin DIMM form factor with a 1Rx4 rank organisation and major-brand chipset components. Registered ECC construction adds an on-board register and error-correction circuitry, which increases module height slightly compared to standard UDIMMs and requires motherboard slots wired for registered operation. The 262-pin notation in some references reflects the DDR4 DIMM edge-connector design; verify that your chassis and CPU cooler clearance accommodate the registered module height before installation.

Highlights

  • 16 GB DDR4 2666 MHz capacity handles heavier server workloads
  • ECC RDIMM registered design detects and corrects single-bit errors
  • 1Rx4 single-rank layout keeps electrical loading low per channel
  • 2 V standard DDR4 voltage reduces power draw under load
  • 288-pin DIMM form factor fits Cisco UCS-MR-X16G1RS-H slots

Specifications

BrandA-Tech
SeriesCompatible Replacement for Cisco
ModelUCS-MR-X16G1RS-H, 15-105079-01
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
ChipsetMajor Brand Chipset
FeaturesUCS-MR-X16G1RS-H, 15-105079-01

Questions about this item

Is this 16 GB DDR4 2666 module the right replacement for my Cisco part numbers UCS-MR-X16G1RS-H and 15-105079-01?

Yes, this A-Tech 16GB DDR4 2666 ECC RDIMM is a compatible replacement built to match the Cisco UCS-MR-X16G1RS-H and 15-105079-01 specifications, including 1Rx4 rank and 1.20V operation.

What does the DDR4 2666 (PC4-21300) speed rating mean for my server workload?

The module runs at 2666 MHz with CL19 timing, giving registered ECC bandwidth suited for memory-bound server tasks such as virtualization and database caching.

Does the 288-pin DDR4 RDIMM form factor fit standard DDR4 RDIMM slots in Cisco UCS servers?

Yes, it uses the 288-pin DDR4 DIMM form factor and registered ECC signalling required by Cisco UCS platforms that accept DDR4 2666 RDIMMs.

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