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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 16 GB |
| Memory Technology | DDR5 |
| Product Voltage | 1.1 V |
| RAM Speed | 4800 MHz |
| RAM Standard | DDR5-4800/PC5-38400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL40 |
| Rank | Single Rank x8 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This Registered DIMM with ECC is engineered for server platforms, ideally deployed in virtualization clusters and in-memory databases where data integrity and uptime are critical. Its single-rank x8 organization at DDR5-4800 minimizes electrical loading on the memory bus, while the registered signal topology and CL40 latency deliver stable, high-bandwidth performance under heavily multi-threaded server workloads.
1. DDR5 technology doubles the burst length and increases bank groups, feeding high-core-count server CPUs with sustained bandwidth for heavily parallelized workloads.
2. 4800MT/s data rate translates to 38.4GB/s of per-module throughput, eliminating memory bottlenecks in real-time analytics and in-memory databases.
3. ECC actively detects and corrects single-bit errors, preventing silent data corruption that could jeopardize financial transactions or hypervisor integrity.
4. Registered signal buffering decouples electrical loading, enabling dense multi-DIMM configurations to scale memory capacity reliably across large virtualization clusters.
5. Operating at 1.1V sharply lowers thermal dissipation and ongoing energy draw, directly reducing the total cost of ownership in hyperscale server farms.
For data centers and enterprise servers, the HMCG78AEBRA168N registered DDR5 RDIMM turns raw specifications into tangible uptime. Its ECC constantly corrects single-bit errors triggered by background radiation, which is non-negotiable when running virtualized clusters on VMware or KVM. One uncorrected bit flip silently corrupts VM states and forces disruptive live migrations or failovers, eroding SLAs. The registered clock buffer isolates electrical loading, enabling you to populate every DIMM slot for massive memory footprints without signal degradation. This is critical when scaling in-memory databases like SAP HANA or large Redis caches, where application consistency depends on the full capacity being recognized and stable. With a genuine 4800 MT/s bandwidth and a single-rank x8 architecture, the module delivers balanced throughput and lower access latency, accelerating real-time analytics and high-concurrency transaction processing. Operating at just 1.1 V, it further improves power efficiency across dense rack deployments, so you maximize virtual machine density while keeping thermal profiles in check. Ultimately, this memory lets you consolidate mission-critical workloads with the confidence of data integrity and predictable performance.
Server Memory Identification
This Hynix 16 GB DDR5‑4800 module is a Registered ECC RDIMM (288‑pin, 1.1 V, CL40) built for rack and tower servers. Its registered signaling and error correction make it ideal for reliable, high‑availability deployments.
General Virtualization
Populate one DIMM per memory channel (1DPC) to maintain the full 4800 MT/s speed. In a typical dual‑socket server with eight channels per CPU, 16 identical modules deliver 256 GB. This configuration comfortably hosts 50–60 moderate VMs, while ECC guards against data corruption and reduces hypervisor crashes.
In‑Memory Database
For Redis clusters or mid‑size SAP HANA instances, fill every channel with a single DIMM to achieve 256 GB at the lowest possible latency. When larger datasets demand more capacity, move to a 2DPC layout to reach 512 GB, accepting a speed drop to DDR5‑4400 or 4000. Balance the latency penalty against the extra headroom for your write‑heavy or transactional workloads.
High‑Performance Computing
Maximize aggregated memory bandwidth by installing one DIMM in each channel—16 pieces in a 2‑socket node provide 256 GB. This symmetric population avoids NUMA imbalance and sustains the 4800 MT/s frequency essential for CFD, weather modeling, and molecular dynamics. Avoid 2DPC to prevent clock‑speed reductions that can starve bandwidth‑intensive floating‑point pipelines.
Rigorously tested and validated for compatibility with Dell PowerEdge R760, HPE DL380 Gen11, Lenovo SR650 V3, Supermicro 620P-TR.
Q: Can I mix this HMCG78AEBRA168N with other memory modules of different brands or speeds?
A: Mixing different brands or speeds in server environments is not recommended. It can cause instability, limit performance to the slowest module, and may violate warranty. For mission-critical systems, use identical modules.
Q: Is this memory compatible with my system?
A: This Hynix DDR5-4800 RDIMM is compatible with servers supporting DDR5 Registered ECC memory on Intel Xeon Scalable (Sapphire Rapids) or AMD EPYC (Genoa) platforms. Verify your motherboard's QVL for exact compatibility.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server motherboard's manual, typically populate identical DIMMs into slot 1 of each channel first (1 DIMM per channel). Balanced memory across CPU memory controllers ensures optimal throughput and ECC functionality.
Q: Does this module support overclocking or XMP profiles?
A: No. As a server-grade Registered ECC DIMM, it adheres to JEDEC DDR5-4800 specifications. Overclocking and XMP are not supported, prioritizing data integrity and system stability for enterprise workloads.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year warranty. Hynix server memory typically has very low failure rates (AFR <0.5%) under specified conditions, ensuring high reliability for data center operations.