General

Engineer's Note

This is an unbuffered ECC DDR4 UDIMM designed for entry-level servers and workstations, where its dual-rank x8 organization boosts memory bandwidth through rank interleaving while ECC error correction ensures data integrity for critical workloads such as file serving and light virtualization. Operating at 1.2 V with CL21 latency on a 288-pin interface, it delivers reliable, low-power performance in platforms that require unbuffered memory with hardware-level fault tolerance.

Technical Specs & Insights

1. Error Correction Code detects and corrects single-bit errors in real time, safeguarding transactional databases and critical file systems from silent data corruption in always-on server environments.
2. Generous 32 GB capacity per module maximizes DIMM slot utilization, enabling denser virtualization footprints and accommodating memory-hungry in-memory analytics platforms without expanding hardware.
3. Dual Rank x8 organization leverages rank interleaving to saturate memory channels, which boosts sustained throughput for highly consolidated container and VM workloads.
4. The 2933 MHz data rate raises memory bandwidth, shrinking response times for concurrent client queries and accelerating data-heavy enterprise applications.
5. Unbuffered signal path reduces access latency compared to registered alternatives, giving latency-sensitive edge computing and light HPC tasks a responsive edge inside cost-optimized server nodes.

Why These Specs Matter

The M391A4G43AB1-CVFQY is a 32GB DDR4-2933 UDIMM with ECC, clearly built for workstations and entry-level servers where data integrity and application uptime are non-negotiable. In a virtualisation cluster running multiple VMs on a single host, a single undetected bit flip in memory can cascade into corrupted guest states, silent data loss, or unexpected reboots. The onboard ECC actively corrects single-bit errors and detects multi-bit faults, directly shielding your hypervisor and critical workloads from what would otherwise be random, costly failures. That protection becomes even more vital when you combine it with the Dual Rank x8 organisation: while you provision dense 32GB capacity for memory-hungry database instances, the dual-rank interleaving keeps latency in check and sustains aggregate bandwidth under concurrent access, so an in-memory cache like Redis delivers consistent sub-millisecond responses even as data sets swell. Its 1.2V operation and 2933 MT/s speed further reduce power draw and thermal stress in 24/7 environments, meaning your storage server or analytics node can scale capacity without a punishing increase in cooling overhead. For the engineer managing financial modelling or real-time analytics, this module translates to uninterrupted calculation integrity and predictable throughput when results cannot be late.

Endurance & Reliability

General Virtualization
For a typical hypervisor hosting mixed workloads, populate the server with eight of these 32 GB ECC UDIMMs (256 GB total) to balance VM density and cost. Distribute modules evenly across all memory channels using a balanced DIMM-per-channel configuration, which maximizes bandwidth and ensures reliable memory interleaving for moderate overcommitment ratios.

In-Memory Database
Achieve maximum capacity by filling every available slot, ideally targeting 512 GB or more with 32 GB DIMMs to keep entire datasets in RAM. A symmetrical population across all memory channels is critical to sustain the high throughput and low latency that in‑memory engines demand, while dual‑rank x8 DIMMs help maintain signal integrity at full load.

High‑Performance Computing (HPC)
Deploy six or eight identical modules per node (192–256 GB) in a fully balanced configuration, one DIMM per channel, to deliver peak memory bandwidth to each core. The 2933 MT/s speed with CL21 latency provides a stable base for bandwidth‑sensitive HPC workloads, and the ECC protection guards against silent data corruption during long‑running parallel simulations.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge T350, HP ProLiant ML30 Gen10, Lenovo ThinkSystem ST250, and similar ECC UDIMM platforms.

FAQ