6 Best Alternatives to the SK Hynix HMA84GR7MFR4N-UH 32GB DDR4-2400 (2026)
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You might be looking for sk hynix hynix hma84gr7mfr4n uh 32gb ddr4 2400 alternatives because your server needs differ from the original module. The SK Hynix HMA84GR7MFR4N-UH provides 32GB of registered ECC memory at 2400MHz. It is built for data stability in enterprise environments. However, you may require different clock speeds, lower latency, or a distinct form factor. Some systems need LRDIMM support or specific Supermicro compatibility that this module does not offer. Other builds might prioritize faster 2666MHz performance or tighter CAS latencies for critical data processing. You might also prefer a different brand for supply chain reasons or specific hardware certifications.
The 6 options on this list were chosen because their specifications overlap with the original product. Each alternative matches the 32GB capacity and ECC support required for server reliability. You will find variations in speed, such as 2666MHz modules, and different types like LRDIMM for high-density setups. These selections address common needs for registered memory without sacrificing error correction. Whether you need exact 2Rx4 matching or lower latency CL15 modules, these specs provide practical upgrades. This guide helps you compare published details to find the right fit for your specific server architecture.
Our top pick: SK Hynix 32GB DDR4-2400 ECC REG.
How these alternatives compare
Samsung 32GB DDR4-2400 ECC Registered Server RAM
The Samsung M393A4K40BB1-CRC offers the same 32GB capacity and ECC registration as the SK Hynix original, but targets Supermicro server builds specifically. It maintains the 2400MHz speed, ensuring compatibility with systems that require this clock rate. The physical dimensions differ slightly, measuring 4 inches in width compared to the SK Hynix module. This Samsung option provides a certified alternative for enterprise users who prioritize stability and specific manufacturer compatibility. It is a solid choice if your server hardware lists Supermicro as a supported platform. You get reliable registered memory without sacrificing error correction capabilities or capacity.
Samsung 32GB DDR4 ECC RDIMM
This Samsung module steps up to 2666MHz, offering faster data transfer rates than the 2400MHz SK Hynix original. It retains the 32GB capacity and ECC registration, making it suitable for workloads that benefit from higher bandwidth. The model M393A4K40BB2-CTD is designed for server upgrades where speed is a priority. If your motherboard supports DDR4-2666, this option delivers better performance while maintaining data integrity through error correction. It is ideal for users who need a balance of capacity and speed in a registered form factor. The upgrade in clock speed is the primary differentiator from the slower original module.
Samsung 32GB DDR4 ECC RDIMM
Like the previous Samsung option, this module operates at 2666MHz, providing a speed increase over the 2400MHz SK Hynix original. It features a CAS Latency of CL19, which is standard for this speed class. The model M393A4K40CB2-CTD7Q offers 32GB of registered ECC memory. This choice is best for servers that can utilize the higher frequency for improved throughput. You gain performance without losing the error correction features essential for server stability. It is a practical alternative if your system supports DDR4-2666 and you want to maximize memory bandwidth. The CL19 latency is a spec you should verify against your server’s requirements for optimal performance.
Nemix RAM 32GB DDR4 2400MHz ECC RDIMM
The Nemix RAM module returns to the 2400MHz speed, matching the SK Hynix original’s clock rate. It distinguishes itself with a CAS Latency of CL17, which is lower than the typical CL19 found in some 2666MHz modules. This 32GB registered ECC memory is designed for servers requiring exact 2Rx4 spec matching. The 1.2V voltage is standard for DDR4. It is a practical upgrade for systems needing single-module expansion with registered support. If your server relies on specific timing parameters or rank configurations, this Nemix option provides a compatible solution. It offers stability and correct electrical specifications for enterprise environments without changing the base speed.
SK Hynix 32GB DDR4 ECC Registered Server RAM
This SK Hynix module operates at 2133MHz, which is slower than the 2400MHz original. However, it features a CAS Latency of CL15, offering lower latency than many higher-speed alternatives. It provides 32GB of registered ECC memory, maintaining the same capacity and error correction capabilities. This option is specialized for server systems that prioritize low latency over raw bandwidth. It is suitable for critical data processing tasks where timing precision is vital. If your server hardware supports DDR4-2133 and you need the tightest possible timings, this module is a strong candidate. It trades speed for responsiveness in specific enterprise workloads.
NEMIX 32GB DDR4-2400 LRDIMM
This Nemix module uses the LRDIMM form factor, which differs significantly from the standard RDIMM of the SK Hynix original. It operates at 2400MHz with a CAS Latency of CL17. The 32GB capacity is achieved through a registered buffer that reduces electrical load on the memory controller. This design is ideal for high-density server upgrades and multi-socket workloads. It allows for larger memory configurations without compromising stability. You must ensure your server supports LRDIMM technology, as it is not backward compatible with standard RDIMM slots. This option is best for administrators needing to maximize memory capacity in compatible enterprise hardware.
Quick picks
Our 7 picks
SK Hynix 32GB DDR4-2400 ECC REG
Best for: server environments needing registered ECC memory
- Total Capacity
- 32GB
- Memory Speed
- 2400MHz
- Form Factor
- DIMM
- ECC Support
- ECC REG
- Compatible Device
- Server
- Dimensions
- 6 × 1 × 0.2 inches
View on Amazon: SK Hynix 32GB DDR4-2400 ECC REG Affiliate link
This SK Hynix module is a 32GB DDR4-2400 memory stick designed for servers. It features registered dual rank architecture and supports ECC to help maintain data integrity during heavy workloads. The 288-pin DIMM form factor fits standard server slots. You should choose this if you need reliable, genuine Hynix memory for a server environment that requires error correction and registered buffering.
Pros
- 32GB capacity for high memory demands
- DDR4-2400 speed rating
- ECC support for data accuracy
- Registered dual rank design
Cons
- Limited to 2400MHz speed
- Server-specific registered design
- No consumer desktop compatibility
Good fit if
- You need ECC memory for a server
- You require registered dual rank modules
- You want genuine Hynix chips
Skip if
- You are building a consumer desktop PC
- You need speeds faster than 2400MHz
- You require unbuffered non-ECC RAM
Verdict: SK Hynix 32GB DDR4-2400 ECC REG is a solid choice for server builds needing registered memory with error correction. It suits IT professionals who prioritize data stability over raw speed in enterprise environments.
Samsung 32GB DDR4-2400 ECC Registered Server RAM
Best for: Supermicro server builds needing ECC
- 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 DDR4-2400 memory with registered ECC support. It is designed for server environments where data integrity is critical. The unit carries Supermicro certification, ensuring compatibility with specific server hardware. You get a standard 2Rx4 configuration that fits standard 288-pin slots. This kit provides reliable performance for enterprise workloads.
Pros
- 32GB capacity for high memory demands
- DDR4-2400 speed standard
- Registered ECC for error correction
- Supermicro certified compatibility
Cons
- Limited to 2400MHz speed
- Server-only compatibility
- No consumer-grade features
Good fit if
- You need ECC memory for a server
- You use Supermicro hardware
- You require 32GB per stick
Skip if
- You are building a desktop PC
- You need speeds higher than 2400MHz
- You want unbuffered memory
Verdict: Samsung 32GB DDR4-2400 ECC REG is a certified server memory solution for users prioritizing stability and Supermicro compatibility. It fits enterprise setups requiring registered ECC modules.
Samsung 32GB DDR4 ECC RDIMM
Best for: Server upgrades needing 2666MHz speed
- Total Capacity
- 32GB
- Memory Speed
- 2666 MT/s
- Form Factor
- RDIMM
- ECC Support
- ECC
- Compatible Device
- Server
View on Amazon: Samsung 32GB DDR4 ECC RDIMM Affiliate link
This Samsung module offers 32GB of capacity in a 2Rx4 RDIMM form factor. It runs at DDR4-2666 (PC4-2666V) with ECC support, making it suitable for server environments. The 1.2V voltage ensures standard power efficiency. You need this if your system requires higher clock speeds than the baseline 2400MHz models. It provides reliable error correction for critical data processing tasks.
Pros
- 32GB capacity for high memory demands
- DDR4-2666 speed exceeds standard 2400MHz
- ECC support ensures data integrity
- RDIMM form factor for server compatibility
Cons
- 2Rx4 rank configuration may limit compatibility on some motherboards
- Specific server-focused model limits desktop use
- Higher speed requires compatible motherboard support
Good fit if
- You need faster memory speeds than 2400MHz
- You are building or upgrading a server
- You require ECC error correction for stability
Skip if
- You are using a standard desktop PC
- Your motherboard only supports 2400MHz or lower
- You need non-ECC UDIMM memory
Verdict: Samsung 32GB DDR4-2666 ECC RDIMM Server Memory fits users who need faster clock speeds and error correction for server workloads.
Samsung 32GB DDR4 ECC RDIMM
Best for: servers needing 2666MHz ECC speed
- Total Capacity
- 32GB
- Memory Speed
- 2666
- CAS Latency
- CL19
- Form Factor
- RDIMM
- ECC Support
- ECC
- Compatible Device
- Server
View on Amazon: Samsung 32GB DDR4 ECC RDIMM Affiliate link
This Samsung server memory module offers 32GB of capacity with a 2666MHz speed. It uses the RDIMM form factor and includes ECC support for data integrity. The CL19 latency is standard for this class. You should choose this if you need reliable server-grade RAM that balances speed and stability for enterprise workloads.
Pros
- 32GB capacity for high memory demands
- 2666MHz speed exceeds base 2400MHz
- ECC support ensures data accuracy
- RDIMM form factor for server compatibility
Cons
- CL19 latency is higher than some competitors
- Only includes a single 32GB stick
- Specific server compatibility requirements apply
Good fit if
- You need ECC memory for server stability
- You want 2666MHz speed over 2400MHz
- You are upgrading a compatible server
Skip if
- You require lower CL15 latency
- You need a dual-stick kit
- You are building a consumer desktop
Verdict: Samsung 32GB DDR4-2666 ECC RDIMM fits users who prioritize speed and error correction in a single module. It is ideal for servers needing 2666MHz performance.
Nemix RAM 32GB DDR4 2400MHz ECC RDIMM
Best for: Server upgrades requiring exact 2Rx4 spec matching
- Total Capacity
- 32GB
- Memory Speed
- 2400 MT/s
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x32GB
- Form Factor
- U-DIMM
View on Amazon: Nemix RAM 32GB DDR4 2400MHz ECC RDIMM Affiliate link
This is a single 32GB DDR4-2400 registered ECC DIMM. It runs at 1.2V with CL17 latency. The 2Rx4 rank configuration matches enterprise server requirements. You get verified fitment for Xeon and PowerEdge systems. It replaces specific Samsung modules. This kit offers enterprise stability with error correction. It suits servers needing exact spec matching for full capacity operation.
Pros
- 32GB capacity in a single module
- DDR4-2400 speed with 1.2V voltage
- Registered ECC for server stability
- CL17 latency timing
- 2Rx4 rank configuration
Cons
- Lower CL17 latency compared to CL15 alternatives
- Slower 2400MHz speed than 2666MHz options
- Single module kit limits dual-channel pairing
Good fit if
- You need a direct replacement for M393A4K40BB1 modules
- You require 2Rx4 rank compatibility for your server
- You want a single high-capacity module for expansion
Skip if
- You need faster DDR4-2666 or higher speeds
- You prefer tighter CL15 latency timings
- You are building a dual-channel kit from scratch
Verdict: Nemix RAM 32GB DDR4-2400 ECC RDIMM fits servers requiring exact 2Rx4 spec matching. It is a practical upgrade for systems needing single-module expansion with registered ECC support.
SK Hynix 32GB DDR4 ECC Registered Server RAM
Best for: server systems needing low latency ECC
- Total Capacity
- 32 GB
- Memory Speed
- 2133MHz
- CAS Latency
- CL15
- ECC Support
- ECC/Reg
- Compatible Device
- Server
- Size
- 32GB
View on Amazon: SK Hynix 32GB DDR4 ECC Registered Server RAM Affiliate link
This SK Hynix module offers 32GB of capacity with DDR4-2133 speed and CL15 latency. It features registered ECC support, making it suitable for server environments. The CL15 timing is faster than many alternatives. You need a server-compatible DIMM with reliable error correction. This kit provides stable performance for data integrity. It is a solid option for systems requiring registered memory.
Pros
- 32GB capacity for high memory demands
- CL15 latency for faster response times
- ECC/Reg support for server stability
- DDR4-2133 speed standard for compatibility
Cons
- Lower DDR4-2133 speed compared to 2666MHz options
- Specific to server use, not desktop
- Registered ECC limits consumer motherboard use
Good fit if
- You need registered ECC memory for a server
- You prioritize low CL15 latency over higher speeds
- You require 32GB capacity for data integrity
Skip if
- You are building a standard desktop PC
- You need DDR4-2666 or faster speeds
- You require unbuffered non-ECC memory
Verdict: SK Hynix 32GB DDR4-2133 CL15 ECC/Reg is a specialized server memory kit. It fits users who need registered ECC stability and low latency for critical data processing.
NEMIX 32GB DDR4-2400 LRDIMM
Best for: High-density server memory upgrades
- Total Capacity
- 32GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x32GB
- Form Factor
- LRDIMM
View on Amazon: NEMIX 32GB DDR4-2400 LRDIMM Affiliate link
This is a 32GB DDR4-2400 LRDIMM module designed for high-capacity server environments. It features 4Rx4 architecture, 1.2V operation, and CL17 latency. The load-reduced buffering lowers electrical load on the memory bus, allowing high-DIMM-count boards to reach maximum capacity per channel. You should use this memory for virtualization, in-memory databases, and 24/7 multi-socket workloads where registered, ECC-protected operation is required.
Pros
- 32GB capacity per stick for high-density configurations
- LRDIMM form factor reduces electrical load on the bus
- ECC support ensures data integrity for servers
- 4Rx4 rank configuration matches specific server requirements
Cons
- Lower speed of 2400MHz compared to 2666MHz alternatives
- Higher CAS latency of CL17
- Requires platform support for LRDIMM form factor
Good fit if
- You need maximum density for high-DIMM-count server boards
- You are running virtualization or in-memory databases
- Your server platform specifically supports LRDIMM modules
Skip if
- You require faster memory speeds like 2666MHz
- Your server only supports RDIMM or UDIMM types
- You are building a standard desktop PC
Verdict: Nemix 32GB DDR4-2400 ECC LRDIMM suits server administrators needing high-density memory for multi-socket workloads, provided their hardware supports the LRDIMM form factor.
Specifications side by side
| Spec | SK Hynix 32GB DDR4-2400 ECC REG | Samsung 32GB DDR4-2400 ECC Registered Server RAM | Samsung 32GB DDR4 ECC RDIMM | Samsung 32GB DDR4 ECC RDIMM | Nemix RAM 32GB DDR4 2400MHz ECC RDIMM | SK Hynix 32GB DDR4 ECC Registered Server RAM | NEMIX 32GB DDR4-2400 LRDIMM |
|---|---|---|---|---|---|---|---|
| Total Capacity | 32GB | 32GB | 32GB | 32GB | 32GB | 32 GB | 32GB |
| Memory Speed | 2400MHz | 2400MHz | 2666 MT/s | 2666 | 2400 MT/s | 2133MHz | 2400MHz |
| CAS Latency | not stated | not stated | not stated | CL19 | CL17 | CL15 | CL17 |
| Voltage | not stated | not stated | not stated | not stated | 1.2V | not stated | 1.2V |
| Module Configuration | not stated | not stated | not stated | not stated | 1x32GB | not stated | 1x32GB |
| Form Factor | DIMM | not stated | RDIMM | RDIMM | U-DIMM | not stated | LRDIMM |
| ECC Support | ECC REG | LP ECC REG | ECC | ECC | ECC | ECC/Reg | ECC |
| Compatible Device | Server | Server | Server | Server | Server | Server | Server |
| Size | 32GB | 32GB | 32GB | 32GB | 32GB | 32GB | 32GB (1X32GB) DDR4 2400MHZ LRDIMM |
| Dimensions | 6 × 1 × 0.2 inches | 6 × 4 × 0.5 inches | not stated | not stated | not stated | not stated | 6 × 0.5 × 0.5 inches |
| Weight | not stated | 1.6 ounces | not stated | not stated | 2 ounces | not stated | 4 ounces |
| Color | Multicolor | Black | not stated | Multicolor | not stated | not stated | 32GB |
| Model | HMA84GR7MFR4N-UH | M393A4K40BB1-CRC | M393A4K40BB2-CTD | M393A4K40CB2-CTD7Q | M393A4K40BB1-CRC | not stated | ML19200-344K01-129 |
Frequently asked questions
Which RAM is best for Supermicro servers needing ECC?
The Samsung 32GB DDR4-2400 ECC Registered Server RAM is a certified solution for Supermicro builds. It provides registered ECC memory to ensure stability in enterprise setups. This module matches the 2400MHz speed of the original SK Hynix part. It is a reliable choice for users prioritizing compatibility with Supermicro hardware.
Can I use DDR4-2666 instead of 2400MHz?
Yes, several alternatives offer 2666MHz speeds. The Samsung 32GB DDR4-2666 ECC RDIMM fits users needing faster clock speeds for server workloads. Another Samsung model with CAS Latency CL19 also provides 2666MHz performance. These options deliver higher bandwidth while maintaining the necessary ECC and registered features for server environments.
What is the difference between RDIMM and LRDIMM?
RDIMM modules, like the Nemix 32GB DDR4-2400, use a register to buffer data for stability. LRDIMM modules, such as the Nemix 32GB DDR4-2400 ECC LRDIMM, add a memory buffer to support higher densities. LRDIMMs are ideal for multi-socket workloads. You must ensure your server hardware supports the specific form factor you choose.
Is there a low latency option for ECC memory?
The SK Hynix 32GB DDR4 ECC Registered Server RAM offers low latency with CAS Latency CL15. It operates at 2133MHz, which is slightly slower than 2400MHz but reduces delay. This specialized kit suits users who need registered ECC stability and low latency for critical data processing in server systems.
Do these modules support error correction?
All listed alternatives support ECC. The SK Hynix and Samsung models provide registered ECC memory for server environments. The Nemix options also include ECC support in both RDIMM and LRDIMM formats. This feature detects and corrects data errors, ensuring data integrity for enterprise applications and server upgrades.
What capacity do these server RAM kits provide?
Every module in this list provides 32GB of capacity. This matches the original SK Hynix module size. You can use these single modules for upgrades or expand your system by installing multiple sticks. The consistent 32GB size ensures you can replace or add memory without changing your total system capacity.
Which RAM is best for high-density server upgrades?
The Nemix 32GB DDR4-2400 ECC LRDIMM is designed for high-density upgrades. It suits server administrators needing more memory for multi-socket workloads. This LRDIMM module supports 2400MHz speed and includes ECC. It is a practical choice when your hardware allows for the LRDIMM form factor to maximize memory density.