Samsung 32GB DDR4-2133 ECC Registered vs Samsung 32GB DDR4-2400 ECC Registered (2026): Key Differences
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You are comparing the samsung m393a4k40bb0 cpb 32gb ddr4 2133 memory vs m393a4k40bb1 crc. Both modules offer 32GB of capacity and support ECC Registered technology for server reliability. The primary difference lies in their operating speeds. One runs at DDR4-2133, while the other operates at DDR4-2400. This speed variation affects data throughput. You must choose based on your system's requirements and compatibility needs.
Key differences
| Aspect | Samsung 32GB DDR4-2133 ECC Registered Memory | Samsung 32GB DDR4-2400 ECC Registered Server RAM |
|---|---|---|
| Memory Speed | DDR4-2133 | DDR4-2400 |
| Compatible Device | not listed | Server |
| Certification | not listed | Supermicro Certified |
| Model Number | M393A4K40BB0-CPB | M393A4K40BB1-CRC |
Which one should you choose?
Choose Samsung 32GB DDR4-2133 ECC Registered Memory if
- You need DDR4-2133 speed for older server platforms.
- You require the specific M393A4K40BB0-CPB model number.
- You are upgrading a system that specifies 2133 MT/s.
Choose Samsung 32GB DDR4-2400 ECC Registered Server RAM if
- You want higher bandwidth with DDR4-2400 speed.
- You need Supermicro certified memory for compatibility.
- You are building a modern server that supports 2400 MT/s.
Verdict: Choose the first option if your server hardware requires DDR4-2133 or if you need the specific CPB model. Select the second option if you need faster DDR4-2400 speeds or require Supermicro certification for guaranteed compatibility.
Speed and Form Factor Comparison
Memory Speed
The first module operates at DDR4-2133, while the second runs at DDR4-2400. This difference in clock speed affects data transfer rates. Higher frequencies allow the system to process information more quickly. If your server workload requires maximum bandwidth, the 2400 MHz option provides a tangible advantage. The 2133 MHz variant is sufficient for standard enterprise tasks but offers lower peak performance. You should choose based on your specific throughput needs and motherboard support. Both are DDR4, so they share the same generation technology.
ECC Support
Both modules feature ECC Registered memory technology. This means they include error-correcting code to detect and fix data corruption. This feature is critical for server environments where data integrity is paramount. Neither product has an advantage here, as both are built for reliability. You get the same level of protection against bit flips in both cases. This shared specification ensures that your server can maintain stable operations over long periods. It is a baseline requirement for this category, so both options meet the standard equally well.
Form Factor
The first module is described as low profile, with a height of 0.15 inches. The second module is also noted as low profile in its features list, with a height of 0.5 inches. While both are compact, the exact dimensions differ slightly. The first module has a width of 0.15 inches and a length of 5.25 inches. The second module has a width of 4 inches and a length of 6 inches. These measurements suggest different physical footprints. You must check your server chassis clearance to ensure fit. The data indicates both are designed for space-constrained environments, but the exact fit varies.
Compatible Device
The second module explicitly lists Server as its compatible device in the attributes. The first module does not list a specific compatible device in its attributes, though its ECC Registered nature implies server or workstation use. The second module is also Supermicro Certified, which confirms its compatibility with Supermicro server hardware. This certification provides assurance for users of that specific brand. The first module lacks this specific certification mention in the provided data. If you use Supermicro hardware, the second module offers verified compatibility. For other brands, both may work, but the data supports the second module more directly.
Capacity
Both modules offer 32GB of capacity. This is a standard high-capacity configuration for modern servers. You get the same amount of memory in both cases. This means your ability to run multiple virtual machines or large databases is identical. The capacity does not differentiate these two products. You should focus on speed and form factor instead. The 32GB size is sufficient for many enterprise workloads. Neither product offers more or less memory than the other. This is a shared specification that meets the baseline requirement for high-end server applications.
Choose the right server RAM for you
Servers needing higher bandwidth performance
Choose this Samsung module if your server requires faster data transfer rates. It operates at DDR4-2400, which offers higher clock speeds than the 2133 variant. This increased frequency allows your system to process information more quickly. The 32GB capacity and ECC Registered support ensure reliable operation for demanding server workloads that benefit from maximum bandwidth.
Systems requiring verified Supermicro compatibility
Select this option if you are building or upgrading a Supermicro server. This specific Samsung model is explicitly certified for Supermicro systems. This certification provides assurance that the hardware will function correctly within their server architecture. The 32GB capacity and DDR4-2400 speed further support stable and efficient server operations.
Budget-conscious servers with standard needs
Pick this module if your server does not require the highest possible speed. It provides the same 32GB capacity and ECC Registered reliability as the faster option. The DDR4-2133 speed is sufficient for many standard server tasks. Its low profile design may also help with airflow in densely packed server racks.
The products compared
Samsung 32GB DDR4-2133 ECC Registered Memory
Best for: Server systems needing 2133 MHz ECC REG
- Total Capacity
- 32GB
- Memory Speed
- 2133 MHz
- Module Configuration
- 1x32GB
- ECC Support
- ECC REG
- Dimensions
- 5.25 × 0.15 × 1.23 inches
View on Amazon: Samsung 32GB DDR4-2133 ECC Registered Memory Affiliate link
This is a Samsung 32GB DDR4 memory module running at 2133 MHz. It features ECC Registered support, which helps maintain data integrity in server environments. The low-profile design fits into tight chassis spaces. You should choose this kit if your system requires registered ECC memory and can operate at 2133 MHz speeds. It is built for stability in enterprise workloads.
Pros
- 32GB total capacity
- DDR4-2133 speed rating
- ECC REG support
- Low-profile build
Cons
- Lower speed than 2400 MHz alternatives
- Registered memory requires compatible server boards
- Not suitable for standard desktop PCs
Good fit if
- You need ECC Registered memory
- Your server supports 2133 MHz
- You require 32GB per stick
Skip if
- You use a standard desktop
- You need higher than 2133 MHz
- You require unregistered memory
Verdict: Samsung 32GB DDR4-2133 ECC REG is a stable server memory option for systems that specifically support registered modules at 2133 MHz.
Samsung 32GB DDR4-2400 ECC Registered Server RAM
Best for: Supermicro server upgrades needing 32GB
- Total Capacity
- 32GB
- Memory Speed
- 2400MHz
- ECC Support
- LP ECC REG
- Compatible Device
- Server
- Dimensions
- 6 × 4 × 0.5 inches
- Weight
- 1.6 ounces
View on Amazon: Samsung 32GB DDR4-2400 ECC Registered Server RAM Affiliate link
This Samsung module offers 32GB of capacity with DDR4-2400 speed. It features registered ECC support for server stability. The build is compact, measuring 6 inches in length and weighing just 1.6 ounces. It is certified for Supermicro systems. This memory suits users needing reliable, high-capacity server components with specific speed requirements.
Pros
- 32GB capacity for high memory demands
- DDR4-2400 speed rating
- Registered ECC support for error correction
- Supermicro certified compatibility
Cons
- Lower speed than DDR4-2133 alternative in this comparison
- No mention of included heatsinks or cooling
- Limited to server use only
Good fit if
- You need 32GB of registered ECC memory
- You are building or upgrading a Supermicro server
- You require DDR4-2400 speed specifically
Skip if
- You need unbuffered non-ECC memory
- You are using a standard desktop PC
- You require speeds higher than DDR4-2400
Verdict: Samsung 32GB DDR4-2400 ECC Reg provides stable server memory with registered ECC. It fits users who need 32GB capacity and Supermicro certification for their specific hardware setup.
Specifications side by side
| Spec | Samsung 32GB DDR4-2133 ECC Registered Memory | Samsung 32GB DDR4-2400 ECC Registered Server RAM |
|---|---|---|
| Total Capacity | 32GB | 32GB |
| Memory Speed | 2133 MHz | 2400MHz |
| Module Configuration | 1x32GB | not stated |
| ECC Support | ECC REG | LP ECC REG |
| Compatible Device | not stated | Server |
| Size | 32GB | 32GB |
| Dimensions | 5.25 × 0.15 × 1.23 inches | 6 × 4 × 0.5 inches |
| Weight | not stated | 1.6 ounces |
| Color | Black | Black |
| Model | M393A4K40BB0-CPB4Y | M393A4K40BB1-CRC |
Frequently asked questions
Is the Samsung M393A4K40BB0-CPB4Y compatible with standard desktop PCs?
No. This module is designed for server systems. It uses ECC Registered technology, which requires specific motherboard support. Standard desktop PCs typically do not support registered memory. You need a server platform that explicitly lists compatibility with ECC REG modules to use this hardware.
What is the physical size difference between the two Samsung modules?
The modules have different physical dimensions. The 2133 MHz version measures 5.25 inches in length and 0.15 inches in width. The 2400 MHz version is longer at 6 inches and wider at 4 inches. These size variations matter for fitting into specific server chassis or rack spaces.
Does the Samsung M393A4K40BB1-CRC work with Supermicro servers?
Yes. This specific model is certified for Supermicro server upgrades. It provides stable memory performance for those specific hardware setups. If you are upgrading a Supermicro system, this module ensures compatibility and reliability for your server operations.
Can I mix these two Samsung memory modules in the same system?
You should not mix them. They operate at different speeds, 2133 MHz and 2400 MHz. Mixing speeds can cause the system to run at the lower frequency or become unstable. For optimal performance, install identical modules with the same speed and specifications in your server.
What does ECC Registered mean for server reliability?
ECC Registered memory detects and corrects data errors. This feature is critical for servers handling sensitive data. The registered component stabilizes the memory bus, allowing for more modules to be installed. Both options provide this error correction to ensure system stability and data integrity.
Which Samsung module is better for high-bandwidth workloads?
The Samsung M393A4K40BB1-CRC is better for high bandwidth. It operates at 2400 MHz, which offers faster data transfer rates than the 2133 MHz model. Higher clock speeds allow your server to process information more quickly, making it suitable for demanding computational tasks.
Are both modules black in color?
Yes. Both the 2133 MHz and 2400 MHz Samsung modules are black. This color choice is standard for server hardware. It helps them blend into server chassis interiors. The color does not affect performance but maintains a uniform appearance within your rack or tower.