AddOn 647651-181-AM 8GB DDR3-1600MHz Registered ECC RDIMM - 240-pin CL11 Single Rank 1.5V Server Memory
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Product Features
Product Overview
The AddOn 647651-181-AM is an 8GB DDR3-1600MHz Registered ECC RDIMM designed for server and workstation memory upgrades. This module delivers reliable performance with enterprise-grade error correction and registered signal buffering to support stable operation in multi-DIMM configurations.
Built to the DDR3-1600/PC3-12800 standard, this memory operates at 1600 MHz with a CAS latency of CL11, balancing speed with consistent timing. The single-rank x4 architecture with 240-pin RDIMM form factor ensures compatibility with server platforms requiring registered memory with ECC protection.
Relevant factors for this section include Memory Size, Memory Technology, Memory Voltage, Number of Pins. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Technical Overview
This DDR3 SDRAM module implements registered ECC architecture, combining error-correcting code with registered signal processing to maintain data integrity and system stability. The 1.5V operating voltage aligns with DDR3 power specifications while the 240-pin RDIMM design provides the physical and electrical interface for server motherboard compatibility.
The memory's technical profile includes single-rank organization with x4 DRAM devices, supporting efficient memory addressing in server environments. With dimensions of 5.50 inches in length and 1.50 inches in width, this RDIMM fits standard server memory slots while the 0.30-inch thickness accommodates typical server airflow requirements.
Relevant factors for this section include Memory Size, Memory Technology, Memory Voltage, Number of Pins. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
This memory module provides essential reliability features for business-critical systems where data integrity and uptime are paramount. The combination of ECC error correction and registered buffering creates a robust memory solution for servers handling continuous workloads.
Enterprise Reliability
ECC detects and corrects single-bit errors while registered signal processing reduces electrical load on the memory controller, enhancing stability in multi-module server configurations.
- Error correction for data integrity
- Signal buffering for system stability
- Server-optimized architecture
Performance Characteristics
Operating at 1600 MHz with CL11 timing, this memory delivers balanced performance suitable for server applications where consistent throughput matters more than extreme latency optimization.
- 1600 MHz operating frequency
- CL11 CAS latency
- DDR3-1600/PC3-12800 standard
Compatibility Assurance
The 240-pin RDIMM form factor with single-rank x4 design targets server platforms requiring registered ECC memory, providing clear physical and electrical compatibility parameters.
- 240-pin RDIMM interface
- Single-rank organization
- Server platform targeting
Deployment / Use Cases
This RDIMM is engineered for server memory expansion and replacement in data center, enterprise, and workstation environments. The registered ECC architecture makes it suitable for systems where data integrity and continuous operation are critical requirements.
Typical deployment scenarios include upgrading existing server memory configurations, replacing failed modules in ECC-protected systems, and building out memory capacity in virtualization hosts, database servers, and application servers. The module's compatibility with HP systems using the 647651-181 specification provides a direct upgrade path for supported platforms.
Server Memory Upgrades
Expand memory capacity in existing server infrastructure while maintaining ECC protection and registered architecture for system stability under increased load.
Data Center Maintenance
Replace aging or failed memory modules in enterprise servers with a compatible RDIMM that matches original specifications for seamless integration.
Physical Profile
The module measures 5.50 inches in length, 1.50 inches in width, and 0.30 inches in thickness, conforming to standard RDIMM dimensions for server chassis compatibility. Weighing approximately 8 ounces, this memory maintains a balanced physical profile that supports proper seating in memory slots while allowing adequate airflow in densely packed server configurations.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 1.50" (38.10 mm), 8 oz (226.80 g). This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 1.50" (38.10 mm)
- Weight
- 8 oz (226.80 g)
- Length
- 5.50" (139.70 mm)
Highlights
- 8GB DDR3-1600MHz registered ECC RDIMM for server memory upgrades
- Error-correcting code (ECC) detects and corrects single-bit memory errors
- Registered signal processing enhances stability in multi-module configurations
- 240-pin RDIMM form factor ensures server motherboard compatibility
- Single-rank x4 architecture with CL11 CAS latency timing
- 1.5V operating voltage aligns with DDR3 power specifications
- Dimensions: 5.50" L × 1.50" W × 0.30" T (139.70 × 38.10 × 7.62 mm)
- Lifetime limited warranty for long-term deployment confidence
Specifications
| Specifications | |
|---|---|
| Manufacturer | AddOn |
| Manufacturer Part Number | 647651-181-AM |
| Brand Name | AddOn |
| Product Name | 8 GB DDR3 SDRAM Memory Module |
| Product Type | RAM Module |
| Technical Information | |
| Memory Size | 8 GB |
| Memory Technology | DDR3 SDRAM |
| Memory Voltage | 1.50 V |
| Number of Modules | 1 x 8GB |
| Memory Speed | 1600 MHz |
| Memory Standard | DDR3-1600/PC3-12800 |
| Memory Rank | Single-rank |
| Error Checking | ECC |
| Signal Processing | Registered |
| CAS Latency | CL11 |
| Physical Characteristics | |
| Number of Pins | 240-pin |
| Form Factor | RDIMM |
| Thickness | 0.30" (7.62 mm) |
| Width | 1.50" (38.10 mm) |
| Length | 5.50" (139.70 mm) |
| Weight (Approximate) | 8 oz (226.80 g) |
| Miscellaneous | |
| Country of Origin | China |
| TAA Compliant | No |
| Warranty | |
| Limited Warranty | Lifetime |
FAQ
What type of systems is this memory module compatible with?
This 240-pin RDIMM is designed for server and workstation platforms that support registered ECC DDR3 memory. It specifically targets systems compatible with the HP 647651-181 specification, making it suitable for upgrading or replacing memory in compatible HP servers and similar platforms requiring registered ECC architecture.
What does 'Registered ECC' mean for this memory module?
Registered ECC combines two reliability features: Error-Correcting Code (ECC) detects and corrects single-bit memory errors to maintain data integrity, while registered signal processing includes a register buffer that reduces electrical load on the memory controller. This combination enhances stability in servers with multiple memory modules, making it suitable for mission-critical applications.
What is the difference between RDIMM and UDIMM memory?
RDIMM (Registered DIMM) includes a register buffer between the memory controller and DRAM chips, which reduces electrical load and improves signal integrity in systems with multiple modules. UDIMM (Unbuffered DIMM) lacks this buffer and is typically used in consumer desktops. This module is an RDIMM, making it appropriate for server environments where stability with multiple modules is essential.
How does the 1600 MHz speed and CL11 latency affect performance?
The 1600 MHz operating frequency determines how quickly data transfers occur, while CL11 (CAS Latency 11) indicates the delay in clock cycles between a memory request and data availability. This combination provides balanced performance suitable for server workloads where consistent throughput and reliability are prioritized over ultra-low latency. The DDR3-1600/PC3-12800 standard ensures compatibility with systems designed for this speed grade.
What does 'single rank x4' mean for this memory module?
Single rank means all memory chips on the module are accessed simultaneously as one logical bank, while x4 refers to the organization of individual DRAM chips (4-bit wide). This architecture affects how the memory controller addresses the module and can influence compatibility with certain systems. The single-rank design typically works well in servers where rank population rules must be followed for optimal performance.
What warranty coverage does this memory module include?
This AddOn memory module comes with a lifetime limited warranty, providing long-term coverage for the product against defects in materials and workmanship. This warranty supports deployment in enterprise environments where extended service life is expected, though specific terms may apply and should be verified at time of purchase for complete details.
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