General

Engineer's Note

This is a server-class DDR4 ECC Registered CDIMM with an Octal Rank x4 organization, uniquely enabling 256GB capacity on a single module to maximize memory density in servers with limited DIMM slots. It is ideally suited for memory-intensive workloads such as virtualization, in-memory databases, and large-scale data analytics, where its Registered signal integrity and ECC error correction ensure unwavering data reliability and system stability.

Technical Specs & Insights

1. A single 256GB module maximizes memory density per server, allowing cloud providers to host significantly more virtual machines on the same physical node without expanding hardware footprint.
2. Integrated ECC corrects single-bit errors automatically, shielding financial transaction databases from silent data corruption and costly unplanned downtime.
3. The registered signal type buffers command and address lines, enabling stable multi-DIMM configurations essential for enterprise servers scaling to terabytes of memory.
4. Octal Rank x4 organization packs eight independent row-sets onto one stick, dramatically expanding in-memory dataset capacity for real-time analytics while keeping per-rank current draw manageable.
5. With a CAS latency of just 11 cycles, memory access requests are served noticeably faster, reducing database query latency and improving application responsiveness under heavy concurrent loads.

Why These Specs Matter

The M352ABK40B20-CK0 is a 256GB DDR4-1600 registered CDIMM engineered for enterprise servers, and its four defining characteristics directly resolve the acute pain points of data center workloads. In a high-density virtualization cluster, the massive 256GB capacity per module allows you to pack terabytes of RAM into a 2U node, eliminating the memory footprint limitations that trigger costly live migrations or force you to under-allocate virtual machines. The registered buffer preserves signal integrity across fully populated 24-slot configurations, so your hypervisor maintains absolute stability under peak consolidation stress. For in-memory databases like SAP HANA or Redis, ECC silently corrects bit-flip errors before they corrupt transactional records—difficult-to-detect faults that otherwise cascade into financial miscalculation or analytics drift. Meanwhile, the octal-rank x4 organization interleaves operations across eight internal rank groups, boosting effective bandwidth and lowering queuing latency. This means your real-time queries return faster and scale deeper into the terabyte range without I/O stalls. Together, these features transform raw density into trusted, fault-resilient performance that protects service continuity and accelerates the data engines your business depends on.

Endurance & Reliability

Server Memory Identified: The specifications (256GB DDR4-1600 Registered ECC CDIMM, CL11, Octal Rank) clearly define a high-capacity server-class module designed for reliability and dense memory configurations.

General Virtualization
For consolidating multiple virtual machines, populate at least two modules per host to leverage dual-channel throughput while maintaining ample headroom. A 2-module configuration (512GB total) comfortably hosts dozens of mixed-load VMs, but using four modules (1TB) per socket ensures the channel interleaving maximizes bandwidth for saturated hypervisors without resorting to slower swap.

In-Memory Database
Latency-sensitive databases like Redis or SAP HANA demand the largest possible non-volatile or volatile pool. Populate all channels symmetrically with these 256GB modules to reach multi-terabyte capacities while preserving balanced memory access. The registered ECC and octal rank design are crucial here, allowing a single server to hold several terabytes of reliable, in-memory data with minimal performance degradation under heavy persistence.

High-Performance Computing
HPC workloads benefit from maximum bandwidth, so install one module per memory channel to avoid rank contention while still achieving high total capacity. Given the module’s high density, equipping each channel with a single 256GB DIMM provides the bandwidth advantage of independent channels and a substantial per-node memory footprint for large-scale simulations and parallel computing tasks.

Verified Compatibility

Rigorously tested, this server memory is compatible with Dell PowerEdge R730, HPE ProLiant DL380 Gen9, Lenovo x3650 M5, and more.

FAQ