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Samsung M321RBGA0B40-CWK 256GB DDR5-4800MHz RDIMM 8Rx4 CL40 Memory
- Capacity: 256GB
- Type: DDR5 RDIMM (Registered DIMM)
- Speed: 4800MHz (PC5-38400)
- CAS Latency: CL40
- Rank: 8Rx4 (Eight Ranks, Quad Data Rate)
- ECC (Error-Correcting Code) support
- Designed for servers and high-performance workstations
- High bandwidth for demanding workloads
- Voltage: 1.1V
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Product Overview
The Samsung M321RBGA0B40-CWK is a 256GB DDR5 Registered DIMM (RDIMM) memory module. It operates at a speed of 4800MHz with timings of CL40 and features an 8Rx4 rank configuration. This high-capacity, high-speed memory is designed for servers and workstations requiring significant memory bandwidth and capacity for demanding applications.
Technical Information
| Product Type | Server Memory Module |
| Brand | Samsung |
| Part Number | M321RBGA0B40-CWK |
| Capacity | 256GB |
| Memory Type | DDR5 RDIMM |
Additional Specifications
| Speed | 4800MHz |
| CAS Latency | CL40 |
| Rank | 8Rx4 |
| ECC | Yes |
| Voltage | 1.1V |
Product Description
The Samsung M321RBGA0B40-CWK is a high-performance 256GB DDR5 Registered DIMM (RDIMM) memory module, engineered to meet the rigorous demands of modern server and workstation environments. DDR5 technology represents a significant leap forward in memory performance, offering increased bandwidth, lower latency, and improved power efficiency compared to previous generations. This module operates at a blazing speed of 4800MHz, providing the throughput necessary for data-intensive applications, large databases, and complex simulations. The module features an 8Rx4 rank configuration, which means it utilizes eight ranks of memory chips, each with a 4-bit data width. This configuration allows for greater memory density and can improve performance by enabling more parallel access to memory banks. The CAS Latency (CL) of 40 indicates the number of clock cycles required to access data, and while higher than some lower-speed modules, it is appropriate for the DDR5 4800MHz standard. Crucially, this is an RDIMM, meaning it includes a register chip that buffers command and address signals, reducing electrical load on the memory controller and allowing for higher memory capacities and speeds. As an ECC (Error-Correcting Code) memory module, the M321RBGA0B40-CWK can detect and correct common types of internal data corruption, significantly enhancing system reliability and data integrity. This makes it an indispensable component for mission-critical applications where data accuracy and uptime are paramount. With its substantial 256GB capacity, high speed, and robust features, this Samsung RDIMM is an ideal choice for servers powering virtualization, cloud computing, big data analytics, and other memory-hungry workloads.


