General

Engineer's Note

This is a server-grade DDR-266 Registered ECC DIMM (RDIMM) designed for legacy enterprise platforms requiring data integrity under sustained workloads, such as small-scale virtualization hosts or memory-resident databases running on early 2000s server chipsets. Its Single Rank x4 configuration with ECC and registered signal buffering ensures stable, error-corrected operation at CL2.5 latency, making it a reliable choice for aging mission-critical systems that prioritize uptime over raw bandwidth.

Technical Specs & Insights

1. Registered signaling unloads the memory control bus, enabling seamless scaling across multiple DIMM slots in large multi-processor servers without compromising signal integrity.
2. ECC protection continuously scrubs and corrects transient bit errors, safeguarding financial transactions and virtual machine state from silent data corruption.
3. Single Rank x4 architecture aligns narrow-die DRAMs to optimize the error correction process, raising system fault tolerance in dense rack deployments.
4. The low column access latency tightens the gap between data requests and delivery, reducing processor idle cycles for latency-sensitive enterprise hosted applications.
5. The legacy PC-2100 throughput class delivers deterministic bandwidth that matches period-appropriate server chipsets, assuring steady data streaming in sustained production environments.

Why These Specs Matter

The M312L2828DT0-CB0 is a server-class Registered ECC DDR-266 module whose four defining characteristics directly confront the real-world failures that keep IT administrators awake at night. ECC error correction actively catches and repairs single-bit memory errors. In a virtualized cluster, a stray cosmic particle can silently flip a bit inside the hypervisor and corrupt an entire multi-tenant environment; the on-die error correction transforms that risk into a non-event, preserving database transactions and service uptime. The registered signal buffer redrives address and command lines, preserving signal integrity when all DIMM slots are populated. This is what lets you scale a VMware ESXi host or Kubernetes node to its full memory capacity without intermittent training failures or boot-time crashes. The module’s Single Rank x4 architecture leverages wide-bit DRAM to deliver efficient prefetch and sustained bandwidth, accelerating in-memory databases like Redis or SAP HANA where microsecond query jitter directly impacts user-facing performance. With a CAS latency of just 2.5, data returns to the CPU with minimal stall cycles, keeping virtualized workloads responsive under heavy context-switching loads. These are not abstract specifications; they are your guarantee of uncorrupted data, unbowed stability, and predictable performance in mission-critical server deployments.

Endurance & Reliability

General Virtualization
With only 1 GB per module, building a viable virtualization host requires populating all available DIMM slots to maximize total capacity while leveraging ECC for stability. Use a balanced multi-channel configuration—typically four or six identical RDIMMs—to sustain moderate VM density. This PC-2100 registered memory should be organized in matched pairs to enable interleaving, reducing latency for hypervisor-level operations.

In-Memory Database
In-memory databases demand both capacity and data integrity, making ECC essential but 1 GB modules a severe constraint. Populate every bank in a multi-socket server, using the maximum supported number of ranks per channel; for example, eight or twelve modules in a fully buffered architecture to approach usable capacities. Lower CAS latency (CL2.5) helps slightly with transactional throughput, but overall capacity starvation is the primary bottleneck you must address through module count.

High-Performance Computing
HPC workloads benefit from the ECC and registered nature of this DDR-266 memory, which ensures signal integrity across densely populated nodes. Configure nodes with fully matched quads or hexa-channel sets, installing 4–8 modules per CPU to provide sufficient bandwidth for iterative simulations. Uniform single-rank x4 modules help maintain consistent memory access patterns, and populating all channels minimizes NUMA penalties in parallel compute tasks.

Verified Compatibility

Stringently tested. Compatible servers: Dell PowerEdge 2650, HP ProLiant DL380 G3, IBM xSeries 345.

FAQ