Cisco UCS-MR-X32G2RSHM
32GB DDR4-2666-MHz RDIMM/dual rank/x4/1.2v. Micron only
Product Highlights
As server workloads grow in complexity — from large-scale virtualization to in-memory databases — having sufficient, reliable memory is non-negotiable. The Cisco UCS-MR-X32G2RSHM is a 32GB DDR4-2666MHz ECC Registered DIMM purpose-built for Cisco UCS M5 server platforms. This Micron-only variant delivers enterprise-grade reliability with dual-rank x4 architecture and 1.2V low-voltage operation.
Operating at 2666 MT/s (PC4-21300), this RDIMM provides the memory bandwidth needed to support Intel Xeon Scalable processors in demanding data center environments. The ECC registered design uses a buffer register between the memory controller and DRAM chips, improving signal integrity and enabling higher DIMM population per channel — critical for scaling memory capacity across multi-socket servers.
Whether you're expanding an existing Cisco UCS B200 M5 blade server, upgrading a C220 M5 rack server, or provisioning new C240 M5 infrastructure, the UCS-MR-X32G2RSHM provides a cost-effective path to increased memory capacity. As a Cisco-qualified part number with Micron-manufactured DRAM, it integrates seamlessly with Cisco UCS Manager for centralized hardware management and monitoring.
Features & Benefits
Enterprise ECC Registered Memory
ECC (Error-Correcting Code) technology detects and corrects single-bit memory errors in real time, preventing data corruption and unplanned downtime. The registered (buffered) design improves electrical signal integrity, enabling servers to support higher DIMM counts per memory channel without sacrificing stability — essential for scaling memory in multi-socket UCS M5 platforms.
DDR4-2666MHz Performance
With a data rate of 2666 MT/s (PC4-21300), this module delivers the memory throughput required by Intel Xeon Scalable processors in Cisco UCS M5 servers. DDR4 technology provides significant improvements in speed and power efficiency over DDR3, translating to faster application response times and lower operating costs in the data center.
Dual Rank x4 Architecture
The 2Rx4 organization provides two independent ranks of memory chips, each with four data channels. This dual-rank configuration enables memory interleaving, which can improve effective bandwidth and reduce latency compared to single-rank modules — a tangible benefit for memory-intensive workloads like database queries and virtual machine consolidation.
Low-Voltage 1.2V Design
Operating at just 1.2 volts, this DDR4 RDIMM consumes less power and generates less heat than previous-generation DDR3 modules. In dense server environments where dozens of DIMMs are populated across multiple sockets, the cumulative power and cooling savings are significant — reducing total cost of ownership over the life of the deployment.
Micron-Manufactured Quality
This part number specifies Micron as the sole DRAM manufacturer, ensuring consistent silicon quality and supply chain traceability. Micron is one of only three global DRAM manufacturers, and their server-grade modules undergo rigorous qualification and testing to meet Cisco's OEM standards for UCS platforms.
Deployment Scenarios
Server Virtualization & VDI
Virtual machine density is directly limited by available server memory. Populating Cisco UCS M5 blade or rack servers with 32GB RDIMMs enables higher VM-per-host ratios, reducing the number of physical servers required and lowering licensing, power, and management costs across VMware vSphere, Microsoft Hyper-V, or KVM environments.
Database & Analytics Workloads
In-memory databases like SAP HANA, Microsoft SQL Server, and Oracle DB benefit enormously from large memory footprints. Adding 32GB DDR4-2666MHz RDIMMs to UCS M5 servers allows more data to reside in memory, dramatically reducing disk I/O latency and accelerating query performance for business-critical analytics.
UCS M5 Server Upgrades & Spares
Organizations extending the operational life of their Cisco UCS M5 infrastructure can use the UCS-MR-X32G2RSHM as a cost-effective upgrade or replacement DIMM. Maintaining a stock of qualified spare memory modules minimizes downtime during hardware failures and supports capacity-on-demand scaling.
General
Memory Specifications
Physical
Compatibility
Compliance
Compatibility Notes
Compatible Cisco UCS Server Platforms
- Cisco UCS B200 M5 Blade Server
- Cisco UCS B480 M5 Blade Server
- Cisco UCS C220 M5 Rack Server
- Cisco UCS C240 M5 Rack Server
Installation Notes
- All DIMMs must be DDR4. Do not mix DDR3 and DDR4 modules.
- Populate blue DIMM slots before black DIMM slots.
- ECC Registered DIMMs cannot be mixed with ECC Unbuffered, Load-Reduced, or Non-ECC memory types.
- Actual operating speed depends on the installed Intel Xeon Scalable processor SKU (ranges from 2133 MHz to 2933 MHz on M5 servers).
- Refer to the Cisco UCS C220/C240/B200 M5 Memory Guide for detailed population rules and supported configurations.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| UCS-MR-X32G2RS-H | Cisco 32GB DDR4-2666MHz RDIMM (Multi-vendor) | Same 32GB DDR4-2666MHz RDIMM specs but allows Samsung, Hynix, or Micron DRAM — UCS-MR-X32G2RSHM is Micron-only. |
| UCS-MR-X32G2RT-H | Cisco 32GB DDR4-2933MHz RDIMM | Higher-speed 2933MHz variant for 2nd Gen Xeon Scalable processors that support faster memory clocks. |
| UCS-MR-X16G1RS-H | Cisco 16GB DDR4-2666MHz RDIMM | Half the capacity at 16GB — lower cost per DIMM for environments where density is less critical. |
| UCS-MR-X64G2RS-H | Cisco 64GB DDR4-2666MHz RDIMM | Double the capacity at 64GB per DIMM — ideal for maximizing memory in fewer DIMM slots. |