SNP5DR48C/16GVXR16G Dell 16GB DDR5 5600MT/s Cl46 RDIMM PC5-44800 1RX8 ECC Registered 288-Pin Memory.

The Dell SNP5DR48C/16GVXR16G is a purpose-built 16GB DDR5 Registered DIMM (RDIMM) engineered for modern server workloads that demand higher bandwidth, lower latency under load, and rigorous error-correction. Specified as 16GB DDR5 5600MT/s CL46 RDIMM PC5-44800 1Rx8 ECC Registered 288-Pin, this module combines the latest DDR5 signaling with ECC Registered architecture to deliver a balanced mix of raw throughput, stability, and manageability. It targets enterprise-class servers and workstations requiring reliable 24/7 operation, memory capacities that scale, and compatibility with server-class chipsets that support DDR5 RDIMM formats.

Core technical profile

The core specifications of the module are especially relevant when planning server upgrades or populating new builds:

• Capacity: 16 gigabytes per module — ideal for medium-density server memory pools.
• Type: DDR5 RDIMM (Registered), 288-pin form factor — compatible with server motherboards that support DDR5 Registered memory.
• Speed: 5600 MT/s (PC5-44800) — high bandwidth for I/O heavy and memory-intensive tasks.
• CAS Latency: CL46 — tuned for the DDR5 generation at this speed grade.
• Rank/Chip Width: 1Rx8 — single-rank, x8 organization for broad compatibility and predictable performance scaling.
• ECC Registered: On-module error-correcting code plus register buffer for stability in server environments.
• Pins/Connector: 288-pin DDR5 RDIMM interface — standard mechanical footprint for server DDR5 RDIMM sockets.

Benefits of ECC Registered memory

• Reliability: automatic correction of single-bit errors prevents application crashes and data corruption.
• Scalability: easier to populate dense memory configurations (more DIMMs per channel) without sacrificing signal quality.
• Predictable behavior: server OS and hypervisor environments expect and take advantage of ECC features for stability under heavy I/O.

Performance characteristics and real-world impact

DDR5 at 5600MT/s unlocks meaningful bandwidth improvements over previous DDR4 generations. For workloads that are memory-bandwidth bound — large in-memory databases, in-memory caches, real-time analytics, high-performance virtualization, and AI inference at scale — higher transfer rates reduce stalls and keep CPU cores fed with data. The Dell SNP5DR48C/16GVXR16G’s CL46 latency number should be interpreted in the context of DDR5’s higher base clock rates: absolute nanosecond latency can be comparable to older DDR generations depending on timing and configuration, while overall throughput is increased.

Typical workload benefits

Virtualization and cloud hosts

In hypervisor environments hosting many VMs or containers, each virtual instance consumes a portion of system memory. The RDIMM’s ECC robustness and higher bandwidth enable denser, more reliable consolidation with fewer memory-related reboots or data integrity incidents.

Databases and in-memory stores

Databases configured to keep large working sets in memory (e.g., Redis, in-memory OLAP caches, or columnar processing engines) benefit from sustained bandwidth. Latency-sensitive query patterns also gain from predictable ECC correction without performance cliffs from memory errors.

AI inference and batch processing

While many AI workloads prefer GPU memory, pre/post-processing, model serving, and larger multi-node pipelines rely on system RAM. Faster DDR5 lowers host bottlenecks during data prep and model orchestration.

Compatibility and system planning

Accurate planning is essential: RDIMMs are not the same as UDIMMs or LRDIMMs, and DDR5 RDIMM support varies by CPU/motherboard firmware. Before purchasing or upgrading, consult your server hardware’s memory compatibility documentation for supported DIMM types, maximum module density per slot, and supported JEDEC speed profiles.

Key compatibility considerations

• Platform support: Verify the server motherboard and CPU family support DDR5 RDIMM PC5-44800 and the 1Rx8 organization.
• BIOS/UEFI firmware: Up-to-date firmware often provides improved memory compatibility and performance tuning for high-speed DDR5 modules.
• Mixing modules: Avoid mixing RDIMM modules with UDIMMs or LRDIMMs. When mixing capacities or speed grades, the system will typically run at the slowest common speed and may disable certain advanced timing features.
• Channel population: Follow the vendor’s recommended channel population rules (e.g., populate channels symmetrically) for optimal performance and maximum supported capacity.

Example system planning checklist

1. Confirm CPU and chipset support DDR5 RDIMM and PC5-44800 speeds.
2. Check maximum supported per-slot capacity and number of supported DIMMs per channel.
3. Validate ECC RDIMM support in your server model’s QVL (Qualified Vendor List) or memory compatibility list.
4. Update server BIOS/UEFI to the latest stable release before installation.
5. Populate memory in matched sets for multi-channel balance and performance.

Installation and configuration best practices

Proper installation and configuration ensure the module performs reliably and reaches expected throughput. Follow these steps and practices when adding or replacing memory in a production server:

Handling and static precautions

Memory modules are sensitive to electrostatic discharge (ESD). Use an anti-static wrist strap, work on an anti-static mat, and keep modules in anti-static packaging until the moment of insertion. Handle by the edges — avoid contact with the gold finger contacts or components.

Seating and torque

Ensure DIMMs are fully seated with retention clips fully engaged. On many enterprise platforms, improper seating is the leading cause of boot failures or intermittent errors.

BIOS settings and XMP/JEDEC profiles

Many server platforms do not expose consumer-like XMP (Extreme Memory Profile) settings; they rely on JEDEC SPD profiles and vendor tuning. After installing memory, confirm in the BIOS/UEFI that memory is recognized at the intended speed (5600MT/s) and that ECC is enabled. If the platform defaults to a lower speed for stability, consult firmware notes for ways to safely enable higher performance profiles.

Interpreting ECC events

ECC will log corrected single-bit errors (which are fixed in real time) and uncorrectable multi-bit errors (which usually indicate failing hardware or severe corruption). A small number of corrected ECC events over time can be expected, but repeating or increasing corrected errors should trigger further investigation and potential module replacement.

Comparisons and decision points

When selecting memory for an enterprise system, consider a few trade-offs between RDIMM variants and other module classes:

RDIMM vs. UDIMM vs. LRDIMM

RDIMM (Registered)

Pros: Strong middle ground for server RAM — registered buffering reduces electrical load and supports high densities with good performance. ECC adds data integrity. Cons: Slightly higher latency than unbuffered modules due to the register stage.

UDIMM (Unbuffered)

Pros: Slightly lower latency per access in limited configurations. Cons: Not appropriate for multi-socket or dense server configurations; typically lacks ECC (unless specifically ECC UDIMMs), and not recommended for mission-critical servers.

LRDIMM (Load-Reduced)

Pros: Uses buffer chips to significantly reduce load permitting very high capacities per system. Cons: More expensive and may have different performance characteristics; compatibility must be validated.

Choosing capacity and module count

The trade-off between higher per-module capacity and more modules per channel affects both cost and performance. Single-rank 16GB modules like the Dell SNP5DR48C/16GVXR16G are commonly used to optimize channel population while keeping per-slot capacities moderate. For maximum density, larger capacity RDIMMs (e.g., 32GB, 64GB) exist, but check platform support and consider whether you want to maximize DIMM count to exploit multi-channel concurrency.

Use cases, verticals and recommended deployments

The Dell SNP5DR48C/16GVXR16G fits into a variety of enterprise deployments. Below are typical vertical use cases and the rationale for choosing this module:

Web and application servers

Web tiers and application servers with many concurrent connections benefit from reliable ECC memory and higher bandwidth for caching layers and thread stacks.

Virtualization hosts and private clouds

Higher bandwidth and ECC help maintain uptime for multiple tenants and reduce the risk of kernel panics from memory errors in high-density VM hosts.

Edge compute and telco infrastructure

Many telco and edge nodes need robust ECC and memory modules tested for operational thermal ranges. RDIMMs tuned for server platforms ensure predictable performance under varied environmental conditions.

High-uptime database replicas and caching nodes

In-memory caching nodes and read-only replicas that serve low-latency queries need consistent memory throughput, making PC5-44800 modules attractive for throughput-critical roles.