General

Engineer's Note

Designed for legacy enterprise servers, this DDR2-667 FB-DIMM leverages Fully Buffered architecture and ECC to maintain signal integrity and data reliability across high-density memory configurations. Its Dual Rank x4 organization optimizes bank-level parallelism, making it well-suited for memory-intensive virtualization and database workloads that demand consistent uptime.

Technical Specs & Insights

1. ECC error correction actively detects and fixes single-bit memory faults, preventing silent data corruption in mission-critical database and virtualization workloads.
2. Fully Buffered architecture serializes data transfers between the memory controller and DIMMs, preserving signal integrity across large-capacity server memory configurations.
3. Dual Rank x4 organization enables address interleaving across internal chip groups, boosting channel utilization and sustaining throughput when multiple virtual machines contend for resources.
4. A 4 GB capacity per module allows a single server to scale memory density efficiently, accommodating more VMs and memory-intensive applications within limited slot counts.
5. 667 MT/s data rate delivers a peak bandwidth of 5.3 GB/s, which keeps latency-sensitive enterprise applications like online transaction processing responsive under load.

Why These Specs Matter

When deploying mission‑critical server infrastructure such as virtualization clusters or in‑memory databases, the design of your memory directly dictates uptime and performance. The Samsung M395T5160QZ4‑CE65 is a 4GB DDR2‑667 Fully Buffered DIMM (FB‑DIMM) engineered precisely for these demands, and four of its characteristics stand out as essential.

First, its Fully Buffered architecture uses an Advanced Memory Buffer to serialize data, allowing multiple DIMMs per channel without signal degradation. In a VMware ESXi host running dozens of virtual machines, this means you can pack the platform with memory without risking instability under heavy consolidation. Second, integrated ECC continually corrects single‑bit errors and detects multi‑bit faults, which is vital for an in‑memory database like SAP HANA where a silent bit flip can corrupt transactional data and lead to financial loss. Third, the dual‑rank x4 organization enables rank interleaving, so the memory controller can begin a read on one rank while the other completes a write, boosting sustained bandwidth during simultaneous VM migrations and query executions. Finally, operating at 1.8V within PC2‑5300 specifications, the module balances signal integrity with manageable thermals, keeping rack‑dense servers cool without sacrificing the low CL5 latency that transactional workloads demand. Together, these features convert a simple spec sheet into a guarantee of data integrity, capacity scalability, and responsive performance where it matters most—on your production floor.

Endurance & Reliability

General Virtualization
To support multiple virtual machines with moderate overhead, install eight M395T5160QZ4-CE65 modules (4 GB each) for a total of 32 GB. Distribute them equally across all four memory channels—two DIMMs per channel—to enable full memory interleaving and maximize throughput. This configuration balances capacity and cost while the ECC and Fully Buffered architecture ensure data integrity for stable host operation.

In-Memory Database
For latency-sensitive, data-intensive workloads such as Redis or SAP HANA, populate all available DIMM slots with these 4 GB FB-DIMMs. A typical 16-slot server could reach 64 GB, permitting large in-memory datasets. Keep channels fully balanced (e.g., four DIMMs per channel) to maintain uniform access times, and rely on ECC to protect against silent corruption in transactional environments.

High‑Performance Computing (HPC)
Achieve peak memory bandwidth by installing modules in a balanced, fully‑populated channel configuration. For example, use eight modules (32 GB total) with two DIMMs per channel across four channels, enabling Quad‑Channel interleaving. This arrangement saturates the memory controllers and minimizes transfer bottlenecks during computationally dense parallel simulations. Always match ranks per channel to preserve the clock‑grade signal integrity inherent to FB-DIMM technology.

Verified Compatibility

Rigorously tested, server-validated: compatible with Dell PowerEdge 2950, HP ProLiant DL380 G5, IBM System x3650.

FAQ