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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 64 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2400 MHz |
| RAM Standard | DDR4-2400/PC4-19200 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL17 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 64GB DDR4-2400 Registered DIMM with ECC is purpose-built for enterprise server platforms, excelling in memory-intensive workloads such as virtualization, in-memory databases, and mission-critical applications that demand uncompromising data integrity. Its quad-rank x4 configuration maximizes capacity density per channel while the registered signaling and 17-cycle CAS latency ensure stable signal integrity and reliable operation under heavy, sustained loads.
1. A 64GB capacity per module enables denser memory populations, allowing data centers to run far more virtual machines per physical host and significantly boost consolidation ratios.
2. ECC error correction continuously catches and repairs single-bit faults, shielding critical financial and database operations from silent data corruption that could otherwise cause outages.
3. The Registered signal type buffers command and address signals, preserving signal integrity when fully populating all memory channels and ensuring rock‑solid stability in multi‑socket server platforms.
4. Quad Rank x4 organization employs x4‑width DRAM devices to maximize per‑DIMM capacity while enhancing ECC effectiveness, delivering the data‑level reliability required for in‑memory analytics at scale.
5. 1.2V low‑voltage operation slashes power consumption across racks of servers, directly lowering electricity and cooling expenses while improving thermal margins in densely packed data centers.
The M393A8K40B21-CTC, a 64GB DDR4-2400 RDIMM, brings together ECC correction, registered buffering, quad-rank x4 architecture, and massive capacity. In a VMware cluster hosting numerous VMs, ECC silently corrects single-bit upsets caused by cosmic radiation, preventing silent data corruption that could crash domain controllers or corrupt financial databases. Registered buffering stabilizes signal integrity across all populated memory slots, enabling a reliable 1TB pool for dense consolidation without sacrificing speed. The quad-rank x4 design leverages rank interleaving to boost sustained bandwidth, directly accelerating an in-memory database like SAP HANA as it processes thousands of concurrent queries. Furthermore, the 64GB module density maximizes capacity per channel, keeping entire analytical datasets resident in memory for real-time insights. This means your virtualized infrastructure and memory-intensive applications gain rock-solid data integrity, seamless scalability under heavy loads, and the confidence that memory will not become the bottleneck during peak transaction windows.
Server Memory Capacity Planning Guide
This 64GB DDR4-2400 Registered ECC RDIMM (quad-rank x4, CL17, 1.2V) is a server-grade module designed for data integrity and high reliability. The following recommendations cover typical enterprise workloads.
General Virtualization
Populate servers with at least eight identical modules (512GB total) to balance memory bandwidth across memory channels. ECC protection safeguards multiple guest VMs, and registered architecture allows dense configurations without compromising stability. A fully balanced population (1 DIMM per channel) minimizes NUMA latency in multi-socket hosts for consistent VM performance.
In-Memory Database
Deploy six or eight modules per socket for a 384GB–512GB footprint to keep entire datasets in RAM. Quad-rank design maximizes capacity per slot but slightly increases latency; ensure BIOS memory interleaving is set optimally for large page tables. Pair with faster persistence storage, as ECC and registered buffering ensure data consistency under heavy write pressure.
High Performance Computing
Use twelve or more modules (768GB+) across all memory channels to saturate CPU memory bandwidth for parallel simulations and modeling. Registered quad-rank DIMMs allow massive per-node capacity, essential for memory-bandwidth-bound HPC codes. Monitor thermal headroom carefully, because quad-rank loads draw more power and require adequate chassis airflow.
Strictly tested, compatible with Dell PowerEdge R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.
Q: Can I mix this M393A8K40B21-CTC with other memory modules of different brands or speeds?
A: Mixing different brands or speeds is not recommended for server environments. Even slight variations can cause instability. For guaranteed reliability, populate only with identical M393A8K40B21-CTC or other Samsung modules from the same family and revision.
Q: Is this memory compatible with my Intel Xeon or AMD EPYC server platform?
A: This is a DDR4-2400 ECC Registered DIMM. It is compatible with Intel Xeon E5-2600 v4 and older, and select AMD EPYC 7001 series platforms that accept 288-pin RDIMMs at 1.2V. Always verify against your motherboard's Qualified Vendor List.
Q: What is the recommended DIMM population order for optimal performance with this Quad Rank module?
A: Follow your server board's population guide. Generally, populate the furthest slot from the CPU per channel first. A Quad Rank x4 RDIMM may limit maximum frequency when multiple DIMMs per channel are installed; single DIMM per channel is ideal.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a JEDEC-compliant server memory module. It operates strictly at DDR4-2400 CL17 1.2V and does not support overclocking or XMP. Its priority is 24/7 data integrity through ECC, not performance tuning.
Q: What warranty and typical failure rate can I expect?
A: This module comes with a 1-year warranty. Typical annualized failure rate (AFR) for Samsung enterprise RDIMMs is well under 0.5%. Combined with ECC, it delivers exceptional long-term reliability for mission-critical server workloads.