SK Hynix 16GB DDR4-2133 ECC Registered vs SK Hynix 16GB DDR4 2400MHz ECC: Spec Comparison
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This comparison of sk hynix 16gb ddr4 2133 ecc registered vs 16gb ddr4 2400mhz ecc looks at two server memory modules from SK Hynix. Both offer 16GB capacity and ECC registration for data integrity in enterprise environments. The main difference lies in their speed and timing. One runs at 2133MHz with tighter latency, while the other operates at 2400MHz with higher latency. You need to weigh speed against responsiveness for your specific server workload.
Key differences
| Aspect | SK Hynix 16GB DDR4-2133 ECC Registered Server Memory | SK Hynix 16GB DDR4 2400MHz ECC RDIMM |
|---|---|---|
| Memory Speed | 2133MHz | 2400MHz |
| CAS Latency | CL13 | CL17 |
| Voltage | not listed | 1.2V |
| Form Factor | not listed | 288-PIN RDIMM |
| Model Number | HMA42GR7MFR4N-TF | 8541593987 |
Which one should you choose?
Choose SK Hynix 16GB DDR4-2133 ECC Registered Server Memory if
- You prioritize lower CAS latency for faster response times per clock cycle.
- Your server platform is optimized for 2133MHz modules.
- You are upgrading a system that specifically requires the HMA42GR7MFR4N-TF model.
Choose SK Hynix 16GB DDR4 2400MHz ECC RDIMM if
- You need higher memory bandwidth for data-intensive applications.
- You want explicit voltage specifications for power management planning.
- Your motherboard supports and benefits from the 2400MHz speed rating.
Verdict: Choose the 2133MHz module if you value lower latency and tighter timings for specific legacy or optimized server builds. Select the 2400MHz module if you require higher throughput and explicit voltage data for modern server configurations. Both provide essential ECC registration for reliability.
Speed and Latency Comparison
Memory speed
The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory operates at a base frequency of 2133MHz. This speed is sufficient for many standard server workloads but is on the lower end of the DDR4 spectrum. In contrast, the SK Hynix 16GB DDR4 2400MHz ECC RDIMM runs at 2400MHz. This higher clock speed allows for faster data transfer rates between the memory and the processor. For applications requiring high throughput, such as large database queries or intensive virtualization tasks, the 2400MHz module provides a tangible performance advantage. You will notice quicker response times in memory-intensive operations with the faster module.
CAS latency
CAS latency measures the delay between a command and the availability of the requested data. The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory features a tight CAS latency of CL13. This lower number indicates faster access times relative to its clock speed. The SK Hynix 16GB DDR4 2400MHz ECC RDIMM has a CAS latency of CL17. While the absolute number is higher, the faster clock speed helps offset this delay. However, for tasks sensitive to raw access latency, the CL13 timing on the 2133MHz module offers a slight edge in responsiveness. You should consider your specific workload when weighing speed against latency.
Voltage
Power efficiency is critical in server environments where heat and energy costs matter. The SK Hynix 16GB DDR4 2400MHz ECC RDIMM specifies a standard voltage of 1.2V. This is the standard operating voltage for DDR4 memory, ensuring compatibility and efficiency across modern platforms. The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory does not list a specific voltage in the provided data. Without this information, you cannot fully assess its power consumption relative to the 2400MHz module. If both operate at standard DDR4 voltages, the difference may be negligible, but the 2400MHz module provides clearer power specifications for planning.
Form factor
Both modules are designed for server use, but their physical and logical configurations differ slightly in description. The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory is identified primarily by its ECC/REG status and server compatibility. The SK Hynix 16GB DDR4 2400MHz ECC RDIMM explicitly states it is a 288-PIN RDIMM. This confirms the standard registration DIMM form factor required for most server motherboards. Both are compatible with server systems that support registered ECC memory. The 2400MHz module provides more explicit pin count details, which can be helpful for ensuring physical compatibility with older or specific server chassis slots.
ECC support
Data integrity is paramount in server environments, and both modules support Error Correcting Code (ECC) memory. The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory includes ECC registration, which helps buffer data signals for stability at higher speeds. The SK Hynix 16GB DDR4 2400MHz ECC RDIMM also features ECC REG RDIMM support. This means both modules can detect and correct single-bit memory errors, preventing system crashes and data corruption. For you, this means neither module compromises on the essential error correction features required for reliable server operation. Both provide the necessary protection for enterprise-grade computing tasks.
Which SK Hynix 16GB DDR4 RAM Should You Buy
Users needing higher clock speed for performance
This module runs at 2400MHz, which is faster than the 2133MHz alternative. If your server workload benefits from increased bandwidth and lower latency relative to speed, this 2400MHz option provides a tangible performance edge. It maintains the same 16GB capacity and ECC registration for reliability.
Systems optimized for lower CAS latency
This stick features a CAS Latency of CL13, compared to CL17 on the faster model. Lower latency can improve response times for certain database queries or specific server tasks. If your hardware is locked to 2133MHz or prioritizes tight timing over raw frequency, this specification suits your needs.
Standard enterprise server deployments
Both are 16GB ECC registered modules for servers. The 2400MHz version offers more headroom for future-proofing within the DDR4 standard. It operates at standard 1.2V voltage and uses a 288-pin RDIMM form factor. This makes it a versatile choice for modern enterprise racks requiring reliable data integrity.
The products compared
SK Hynix 16GB DDR4-2133 ECC Registered Server Memory
Best for: servers needing 2133MHz registered ECC memory
- Total Capacity
- 16GB
- Memory Speed
- 2133 MHz
- CAS Latency
- CL13
- ECC Support
- ECC REG
- Compatible Device
- Server
View on Amazon: SK Hynix 16GB DDR4-2133 ECC Registered Server Memory Affiliate link
This SK Hynix module provides 16GB of server memory with DDR4-2133 speed and ECC registered support. It features a CL13 latency for stable data handling. The 2Rx8 configuration ensures compatibility with enterprise servers. You should choose this if your system requires registered ECC memory at 2133MHz. It is built for reliability in data centers rather than high-speed consumer gaming.
Pros
- 16GB capacity per stick
- DDR4-2133MHz operating speed
- ECC registered (RDIMM) support
- CL13 CAS latency
Cons
- Lower 2133MHz speed compared to 2400MHz alternatives
- Server-only compatibility, not for standard desktops
- 2Rx8 configuration may limit total system capacity
Good fit if
- You need registered ECC memory for a server
- Your motherboard supports DDR4-2133MHz
- You prioritize stability over higher clock speeds
Skip if
- You are building a standard desktop PC
- Your system requires DDR4-2400MHz or faster
- You need unregistered UDIMM memory
Verdict: SK Hynix 16GB DDR4-2133 ECC Registered is a solid choice for servers requiring 2133MHz registered memory. It fits systems that need ECC stability at standard speeds.
SK Hynix 16GB DDR4 2400MHz ECC RDIMM
Best for: Server workstations needing ECC stability
- Total Capacity
- 16GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x16GB
- ECC Support
- ECC REG
View on Amazon: SK Hynix 16GB DDR4 2400MHz ECC RDIMM Affiliate link
This SK Hynix module offers 16GB of capacity with a 2400MHz speed. It uses ECC Registered technology to correct errors, ensuring stability for servers. The 1.2V voltage supports energy efficiency. You should choose this for workstations needing reliable memory. It fits well in systems requiring registered DIMMs. The CL17 latency is standard for this class. This is a solid option for professional environments.
Pros
- 16GB capacity for substantial memory needs
- 2400MHz speed for responsive performance
- ECC Registered support for error correction
- 1.2V voltage for efficiency
Cons
- CL17 latency is slower than non-ECC alternatives
- Registered DIMM limits compatibility to server boards
- 2Rx8 configuration may not fit all slots
Good fit if
- You need ECC Registered memory for a server
- You require 16GB of stable RAM
- You prioritize error correction over speed
Skip if
- You use a consumer desktop motherboard
- You need higher than 2400MHz speed
- You want non-registered standard DIMMs
Verdict: SK Hynix 16GB DDR4-2400 ECC REG is a stable choice for servers. It suits users who need error correction. It does not fit consumer PCs.
Specifications side by side
| Spec | SK Hynix 16GB DDR4-2133 ECC Registered Server Memory | SK Hynix 16GB DDR4 2400MHz ECC RDIMM |
|---|---|---|
| Total Capacity | 16GB | 16GB |
| Memory Speed | 2133 MHz | 2400MHz |
| CAS Latency | CL13 | CL17 |
| Voltage | not stated | 1.2V |
| Module Configuration | not stated | 1x16GB |
| ECC Support | ECC REG | ECC REG |
| Compatible Device | Server | not stated |
| Form Factor | not stated | RDIMM |
| Size | 16GB | 16GB |
| Model | HMA42GR7MFR4N-TF | 8541593987 |
| Color | not stated | Multicolor |
Frequently asked questions
Can I use these SK Hynix 16GB DDR4 sticks in a standard desktop PC?
No. Both modules are designed specifically for server environments. The first option is an ECC Registered module, while the second is an RDIMM. Consumer desktop motherboards typically do not support registered or ECC memory. You need a server or workstation motherboard that explicitly lists compatibility with these form factors to ensure the system boots and runs correctly.
What is the voltage requirement for the SK Hynix 2400MHz ECC module?
The SK Hynix 16GB DDR4 2400MHz ECC RDIMM operates at 1.2V. This is the standard voltage for DDR4 memory. Using the correct voltage is essential for stability and power efficiency. Ensure your server power delivery can support this standard voltage level without requiring any special adjustments or additional cooling solutions beyond standard server airflow.
Does the 2400MHz module have a specific CAS latency rating?
Yes, the SK Hynix 16GB DDR4 2400MHz ECC RDIMM has a CAS Latency of CL17. This timing value indicates the delay between the command to access data and the moment the data is available on the pins. Lower latency generally improves response times. This specific rating is a key specification for evaluating performance in latency-sensitive server applications.
Which model number should I look for when ordering the faster 2400MHz stick?
The faster 2400MHz module is identified by the model number 8541593987. You can also reference its ASIN B072YZSTNL for verification. Checking these identifiers ensures you receive the correct 2400MHz variant rather than the 2133MHz version. Always match the model number to your purchase order to avoid compatibility issues with your specific server hardware configuration.
Is ECC support available on both of these SK Hynix memory kits?
Yes, both modules include ECC support. Error Correction Code memory detects and corrects single-bit memory errors. This feature is critical for maintaining data integrity in server environments where uptime and accuracy are paramount. Both the 2133MHz registered stick and the 2400MHz RDIMM provide this protection, making them suitable for enterprise workloads that cannot tolerate data corruption.
What is the physical form factor of the 2400MHz ECC memory?
The 2400MHz module uses the RDIMM form factor. Registered DIMMs are designed to handle higher memory loads and improve signal integrity in multi-bank configurations. This physical shape ensures it fits into the correct slots on compatible server motherboards. Verify your server’s slot type before installation, as RDIMMs are not interchangeable with unregistered or other registered variants in all systems.