Best SK Hynix DDR4 RAMS: 15 Models Compared
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This guide compares the best SK Hynix ddr4 RAMs available for various server and desktop needs. You will find options ranging from 8GB to 64GB capacities in both desktop and registered server formats. The top pick is the SK Hynix 32GB DDR4-2133 RDIMM, which leads for server systems needing 32GB ECC memory. We evaluated 15 models strictly by their published specifications. This approach ensures you choose the correct module for your hardware's specific capacity and error correction requirements.
Quick picks
Our 15 picks
SK Hynix 32GB DDR4-2133 RDIMM
Best for: server systems needing 32GB ECC memory
- Total Capacity
- 32GB
- Memory Speed
- 2133 MHz
- Module Configuration
- 1x32GB
- Form Factor
- U-DIMM
- ECC Support
- ECC RDIMM
- Dimensions
- 5.25 × 0.16 × 1.21 inches
This SK Hynix memory module provides 32GB of capacity with DDR4-2133 speed. It features ECC support and uses the RDIMM form factor, making it suitable for servers and workstations that require error correction. The module measures 5.25 inches in length and weighs 1.12 ounces. You get a reliable component for systems needing registered memory with standard latency for general server tasks.
Pros
- 32GB total capacity
- DDR4-2133 speed rating
- ECC support for error correction
- RDIMM form factor
Cons
- Lower 2133MHz speed compared to 2400MHz or 2666MHz options
- 4Rx4 configuration may limit compatibility with some boards
- No included software or management tools
Good fit if
- You need 32GB of registered memory
- Your system requires ECC support
- You are building a server with 2133MHz slots
Skip if
- You require speeds faster than 2133MHz
- You are building a desktop PC without ECC support
- You need non-registered UDIMM modules
Verdict: SK Hynix 32GB DDR4-2133 ECC RDIMM fits users who prioritize capacity and error correction over high clock speeds for their server infrastructure.
SK Hynix 16GB DDR4-2133 ECC Registered Server Memory
Best for: Low-latency DDR4 server systems
- 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
This SK Hynix module gives you 16GB of DDR4 memory running at 2133MHz. It features registered ECC error checking to protect enterprise workloads and an unusually low CAS latency of CL13. If you run a compatible server motherboard that needs stable data integrity and tight memory timings rather than high clock speeds, this stick meets your exact hardware requirements.
Pros
- Low CL13 CAS latency
- Registered ECC error correction
- 16GB single-module capacity
- Dedicated server compatibility
Cons
- 2133MHz clock speed is lower than newer DDR4 tiers
- Registered design is incompatible with standard desktop PCs
Good fit if
- You run a server board requiring DDR4 registered ECC memory.
- You prioritize low CL13 memory latency for server tasks.
Skip if
- You build a standard desktop computer without registered RAM support.
- You need higher memory frequencies like 2666MHz or 3200MHz.
Verdict: SK Hynix 16GB DDR4 2133MHz ECC Server RAM fits system administrators who need low CL13 timing and registered error correction for enterprise boards. It delivers verified stability for hardware platforms keyed to 2133MHz DDR4 specs.
SK Hynix 8GB DDR4 PC4-17000U RAM
Best for: basic desktop upgrades needing 8GB DDR4
- Total Capacity
- 8 GB
- Module Configuration
- 1x8GB
- Size
- 8GB
- Dimensions
- 5.25 × 0.15 × 1.21 inches
This SK Hynix module gives you 8GB of DDR4 memory running at PC4-17000u specifications. It features a 2Rx8 rank layout and measures 5.25 inches long by 1.21 inches high. You will find this stick fits basic desktop computer setups that require a single entry-level DDR4 module rather than higher-density or registered server memory.
Pros
- 8GB DDR4 capacity
- PC4-17000u transfer rate specification
- 2Rx8 dual-rank memory architecture
- Standard 1.21-inch module height
Cons
- Lower 8GB capacity than 16GB, 32GB, and 64GB options on this list
- PC4-17000 bandwidth is slower than PC4-21300 and PC4-25600 alternatives
- Data does not specify an included heat spreader
Good fit if
- You need an entry-level 8GB DDR4 memory module.
- You run a motherboard supporting PC4-17000u unbuffered memory.
Skip if
- You need high-density memory modules offering 16GB to 64GB capacities.
- You require ECC registered memory for enterprise server hardware.
Verdict: SK Hynix 8GB DDR4 PC4-17000 RAM delivers standard 2Rx8 memory for users needing a baseline 8GB replacement module. It fits everyday systems that do not require higher-frequency DDR4 speeds or server-grade error correction.
SK Hynix 32GB DDR4 ECC Registered Server RAM
Best for: 2133MHz server builds needing CL15 latency
- 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
This SK Hynix module delivers 32GB of DDR4 memory designed specifically for server motherboards. It operates at a DDR4-2133 transfer speed paired with CL15 CAS latency and registered ECC support. You gain high single-module capacity and automated data integrity protection for continuous uptime, assuming your platform accommodates registered server memory modules rather than unbuffered desktop RAM.
Pros
- 32GB single-module capacity
- CL15 CAS latency
- Registered ECC error correction
Cons
- 2133MHz clock speed is lower than 2400MHz or 2666MHz options
- Registered ECC format is incompatible with standard desktop PCs
Good fit if
- You run a server platform requiring registered ECC memory.
- You need a 32GB module with CL15 latency at DDR4-2133 speed.
Skip if
- You build or upgrade a standard consumer desktop PC.
- You require memory clock frequencies higher than 2133MHz.
Verdict: SK Hynix 32GB DDR4-2133 CL15 ECC Server RAM supplies high single-stick density with low CL15 latency for compatible server boards. It targets enterprise administrators building or expanding 2133MHz memory banks that mandate registered error correction.
SK Hynix 32GB DDR4-2400 ECC REG
Best for: servers requiring 32GB 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
This SK Hynix module provides 32GB of DDR4 memory running at 2400MHz. It features ECC and registered (RDIMM) technology, which corrects data errors and stabilizes server operations. The dual-rank design helps manage data flow efficiently. You should choose this kit if you need reliable, high-capacity memory for enterprise hardware that supports registered DIMMs.
Pros
- 32GB capacity per stick
- 2400MHz speed rating
- ECC error correction support
- Registered (RDIMM) architecture
Cons
- Lower 2400MHz speed compared to 2666MHz or 2933MHz alternatives
- Requires server-compatible motherboards
- Not suitable for standard desktop PCs
Good fit if
- You are upgrading a server with registered DIMM slots
- You need 32GB capacity for virtualization tasks
- You prioritize ECC stability over maximum clock speed
Skip if
- You are building a standard desktop PC
- You need speeds higher than 2400MHz
- Your motherboard does not support ECC or registered memory
Verdict: SK Hynix 32GB DDR4-2400 ECC REG is a stable, high-capacity option for servers that require registered memory and error correction, though its speed is modest compared to faster DDR4 variants.
SK Hynix 32GB DDR4-2133MHz ECC
Best for: Server memory upgrades requiring 32GB capacity
- Total Capacity
- 32GB
- Memory Speed
- 2133MHz
- ECC Support
- ECC
This SK Hynix module provides 32GB of DDR4 memory running at 2133MHz. It features ECC support for error correction, making it suitable for systems requiring data integrity. The registered design indicates it is built for server or workstation environments rather than standard desktops. You get a single stick that fits into compatible DIMM slots to expand your system's total memory capacity.
Pros
- 32GB capacity for high memory demands
- 2133MHz speed for stable operation
- ECC support ensures data accuracy
- Registered DIMM form factor
Cons
- Lower 2133MHz speed compared to 2400MHz or 2666MHz options
- ECC Registered type limits use to server/workstation boards
- Single stick may require pairing for dual-channel performance
Good fit if
- You need 32GB of ECC memory for a server
- You are upgrading a workstation that supports DDR4-2133
- You require registered memory for stability
Skip if
- You need speeds higher than 2133MHz
- You are building a standard desktop PC
- You require non-ECC unbuffered memory
Verdict: SK Hynix 32GB DDR4-2133 ECC RDIMM is a solid choice for server upgrades needing 32GB capacity, though its 2133MHz speed is slower than other listed models.
SK Hynix 16GB DDR4 ECC Server RAM
Best for: 2133MHz DDR4 server memory expansions
- Total Capacity
- 16Gb
- Memory Speed
- 2133Mhz
- Module Configuration
- 1X16gb
- ECC Support
- Ecc Registered
- Compatible Device
- Server
- Dimensions
- 5.25 × 0.16 × 1.21 inches
This SK Hynix module is a single 16GB DDR4 memory stick running at 2133MHz. Built for server systems, it features ECC Registered support to detect and correct data corruption during continuous workloads. You get PC4-17000 bandwidth within physical dimensions of 5.25 by 1.21 inches. It suits you if you need dedicated ECC RAM for compatible servers.
Pros
- ECC Registered error correction for server stability
- 16GB capacity on a single module
- Standard 2133MHz DDR4 PC4-17000 operational speed
Cons
- 2133MHz clock speed is lower than 2400MHz and 2666MHz alternatives
- Server-only design is incompatible with standard unbuffered desktop systems
Good fit if
- You need 16GB of ECC Registered memory for a server platform.
- You operate hardware configured specifically for 2133MHz DDR4 modules.
Skip if
- You require standard unbuffered desktop RAM rather than server memory.
- You want higher transfer rates such as 2666MHz or 3200MHz.
Verdict: SK Hynix 16GB 2133MHz ECC Registered Server RAM supplies 16GB of error-correcting memory to system builders maintaining or expanding 2133MHz DDR4 enterprise servers.
SK Hynix 32GB DDR4-2666 ECC REG
Best for: Server memory upgrades needing 32GB capacity
- Total Capacity
- 32GB
- Memory Speed
- 2666MHz
- Form Factor
- DIMM
- ECC Support
- ECC REG
- Height
- 4 inches
- Dimensions
- 9 × 6 × 4 inches
This SK Hynix module offers 32 GB of DDR4 memory running at 2666 MHz. It includes ECC and registered (REG) features, making it suitable for servers and workstations that require high stability and error correction. You get a single stick that fits standard DIMM slots. The 32 GB capacity helps handle large datasets or virtual machines without swapping to disk.
Pros
- 32 GB total capacity
- 2666 MHz speed
- ECC support for error correction
- Registered (REG) design for stability
Cons
- Single stick only; dual-channel requires buying another identical module
- Not compatible with standard desktop motherboards due to ECC/REG requirements
- No included heatsink or cooling fan listed
Good fit if
- You need a single 32 GB stick for a server
- Your motherboard supports DDR4-2666 ECC RDIMMs
- You prioritize data integrity over gaming performance
Skip if
- You are building a standard gaming PC
- Your system only supports non-ECC UDIMMs
- You want a dual-channel kit out of the box
Verdict: SK Hynix 32GB DDR4-2666 ECC REG is a solid choice for enterprise systems needing high-capacity, error-correcting memory. It fits well in servers that explicitly support registered DIMMs at this speed.
SK Hynix 16GB DDR4 2400MHz ECC RDIMM
Best for: 1.2V DDR4-2400 ECC server upgrades
- Total Capacity
- 16GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL17
- Voltage
- 1.2V
- Module Configuration
- 1x16GB
- ECC Support
- ECC REG
This SK Hynix module gives you 16GB of DDR4 memory running at 2400MHz with CL17 timings. It operates at a standard 1.2V on a 288-pin RDIMM form factor with registered ECC support. If you manage a compatible server or workstation board that requires DDR4-2400 registered memory for stable data integrity, this stick fits your hardware pool directly.
Pros
- Runs at standard 1.2V operating voltage
- Features ECC registered (RDIMM) data error correction
- 16GB capacity on a 2Rx8 dual-rank configuration
- Standard 288-pin DDR4-2400 (PC4-19200) specification
Cons
- 2400MHz speed is slower than 2666MHz and 3200MHz options
- Registered RDIMM build will not function in unbuffered consumer desktop slots
Good fit if
- You need a 1.2V registered ECC RDIMM module for your server.
- You run hardware tailored for 2400MHz CL17 memory.
Skip if
- You need unbuffered DIMMs for a standard desktop motherboard.
- You require faster transfer speeds such as 2666MHz or 3200MHz.
Verdict: SK Hynix 16GB DDR4-2400 ECC RDIMM suits server operators upgrading dual-rank memory channels to 2400MHz while maintaining a standard 1.2V power profile.
SK Hynix 64GB DDR4 2666MHz ECC Server RAM
Best for: high-density DDR4 server memory expansion
- Total Capacity
- 64GB
- Memory Speed
- 2666MHz
- CAS Latency
- CL19
- Voltage
- 1.20 V
- Module Configuration
- 1x64GB
- ECC Support
- ECC/REG
This SK Hynix module gives you 64 GB of DDR4 server memory on a single stick. It runs at 2666 MHz with a CAS latency of CL19 and requires 1.20 V. The load-reduced design and ECC registration stabilize high-capacity workloads. You should pick this module if you manage a DDR4 server that needs high memory density per slot.
Pros
- High 64 GB capacity on a single module
- 2666 MHz operating frequency
- Load-reduced ECC design for server memory bus stability
- Standard 1.20 V DDR4 operating voltage
Cons
- CL19 latency is higher than DDR4-2133 or DDR4-2400 options
- Requires a motherboard with ECC load-reduced server support
Good fit if
- You manage an enterprise server requiring high memory density per slot.
- You need 64 GB DDR4 modules running at 2666 MHz.
- You have a system that supports load-reduced ECC memory.
Skip if
- You use standard consumer desktop or laptop hardware.
- You need lower latency than CL19 for your workloads.
Verdict: SK Hynix 64GB DDR4-2666 ECC Load Reduced Server RAM suits IT administrators upgrading enterprise servers that need 64 GB density per DIMM slot. It delivers reliable 2666 MHz throughput at 1.20 V for memory-heavy server platforms.
SK Hynix 32GB DDR4-2400 ECC RDIMM
Best for: Server upgrades requiring 32GB ECC RDIMM
- Total Capacity
- 32GB
- Memory Speed
- 2400MHz
- Form Factor
- RDIMM
- ECC Support
- ECC
- Dimensions
- 9 × 6 × 1 inches
- Weight
- 1.12 ounces
This SK Hynix module is a 32GB DDR4-2400 registered DIMM designed for server environments. It features ECC support to correct data errors and operates at 1.2V. The PC4-19200 rating indicates its bandwidth capacity. You should choose this kit if your motherboard requires registered memory and you need reliable error correction for stable server operations.
Pros
- 32GB single-stick capacity
- DDR4-2400 speed rating
- ECC error correction support
- Registered DIMM (RDIMM) form factor
Cons
- Lower 2400MHz speed compared to 2666MHz or 2933MHz options on this list
- Server-only RDIMM type incompatible with standard desktop motherboards
- Sold in brown box packaging which may lack retail branding
Good fit if
- You need a single 32GB stick for server expansion
- Your system requires ECC registered memory
- You prioritize capacity over maximum clock speed
Skip if
- You are building a standard desktop PC without ECC support
- You need speeds faster than 2400MHz
- You require retail packaging with full warranty documentation
Verdict: SK Hynix 32GB DDR4-2400 ECC RDIMM fits users needing high-capacity server memory with error correction, though its 2400MHz speed is slower than other options listed.
SK Hynix 64GB DDR4 2400MHz ECC LRDIMM
Best for: high-density enterprise server memory upgrades
- Total Capacity
- 64GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL 17
- Voltage
- 1.2V
- Form Factor
- Load Reduced
- ECC Support
- ECC/REG
This SK Hynix module gives you a 64GB capacity for enterprise servers. It operates at a 2400MHz clock speed with CL17 timings at 1.2V. The 4Rx4 quad-rank design uses load-reduced buffering to lessen electrical load on memory controllers. It suits you if you need dense, stable memory pools for virtualization or memory-intensive server deployments.
Pros
- High 64GB density on a single 288-pin module
- Load-reduced architecture minimizes bus loading
- Standard 1.2V operating voltage
- ECC support for enterprise data integrity
Cons
- 2400MHz transfer rate is slower than 2666MHz or 3200MHz options
- Load-reduced server design is incompatible with standard desktop motherboards
Good fit if
- You need 64GB per slot to maximize total server memory density.
- You run enterprise workloads that require ECC error correction and load reduction.
Skip if
- You need standard unbuffered RAM for a desktop PC or laptop.
- You require memory frequencies higher than 2400MHz.
Verdict: SK Hynix 64GB DDR4 2400MHz ECC LRDIMM is built specifically for enterprise server administrators who require maximum per-slot capacity and load-reduced signaling stability over higher raw clock frequencies.
SK Hynix 16GB DDR4 2133MHz Desktop RAM
Best for: Standard desktop upgrades
- Total Capacity
- 16GB
- Memory Speed
- 2133MHz
- Module Configuration
- 2Rx8
- Compatible Device
- Desktop
This SK Hynix module offers 16GB of DDR4 memory running at 2133MHz. It uses a 2Rx8 configuration and is designed specifically for desktop computers. The 288-pin PC4-2133P specification ensures compatibility with standard desktop motherboards. You get reliable base-speed performance for everyday computing tasks without the complexity of server-grade ECC features.
Pros
- 16GB capacity for solid multitasking
- 2133MHz speed for standard desktop use
- 2Rx8 configuration for compatibility
- Designed for desktop systems
Cons
- Lower 2133MHz speed compared to higher-tier options
- Only 16GB capacity per stick
- Non-ECC standard limits server use
Good fit if
- You need a basic desktop memory upgrade
- You are building a standard office PC
- You require 16GB per stick
Skip if
- You need ECC registered memory
- You require speeds above 2133MHz
- You are building a server
Verdict: SK Hynix 16GB DDR4 2133MHz Desktop RAM fits users who need standard desktop memory without ECC features. It provides adequate capacity and speed for general office or home computing tasks.
SK Hynix 32GB DDR4 ECC RDIMM
Best for: enterprise servers requiring 2666 MHz registered memory
- Total Capacity
- 32GB
- Memory Speed
- 2666 MT/s
- Form Factor
- RDIMM
- ECC Support
- ECC
- Dimensions
- 9 × 6 × 4 inches
This SK Hynix module gives you 32GB of DDR4 server memory operating at PC4-2666V speeds. It features a 2Rx4 registered RDIMM design with registered ECC error correction for enterprise system stability. You should choose this module if you manage compatible server platforms that require 2666 MHz registered memory and reliable multi-channel density.
Pros
- 32GB capacity on a single module
- DDR4-2666 transfer speed (PC4-21300)
- Registered ECC (RDIMM) architecture
- Dual-rank 2Rx4 configuration
Cons
- Server RDIMM form factor is incompatible with standard desktop motherboards
- Data does not specify CAS latency timing
- Lower 2666 MHz clock rate than DDR4-2933 or DDR4-3200 options
Good fit if
- You run a server board requiring DDR4 registered ECC memory.
- You need 32GB density per slot running at 2666 MHz.
Skip if
- You need unbuffered memory for a standard consumer desktop or laptop.
- You require faster transfer speeds such as 2933 MHz or 3200 MHz.
Verdict: SK Hynix 32GB DDR4-2666 ECC RDIMM suits enterprise server administrators who need stable 2666 MHz registered memory for dual-rank multi-channel configurations. It provides error correction and 32GB capacity specifically for compatible server hardware.
SK Hynix 16GB DDR4 2666MHz ECC RDIMM
Best for: 2666MHz enterprise server memory expansions
- Total Capacity
- 16GB
- Memory Speed
- 2666 MT/s
- CAS Latency
- CL19
- Form Factor
- RDIMM
- ECC Support
- ECC
- Compatible Device
- Server
This SK Hynix module gives you 16GB of DDR4 server memory operating at a 2666MHz frequency. It features an RDIMM form factor with error-correcting code (ECC) support and a CL19 CAS latency. Designed strictly for server platforms requiring registered memory, it suits you if you need reliable data integrity for multi-channel enterprise systems.
Pros
- 16GB capacity per module
- 2666MHz operating speed (PC4-21300)
- ECC RDIMM build supports server data protection
Cons
- CL19 latency is higher than CL15 or CL17 alternatives
- 16GB size is lower than available 32GB or 64GB modules
- RDIMM design is incompatible with standard desktop PCs
Good fit if
- You need ECC registered DDR4 memory for a compatible server motherboard.
- You want 2666MHz operational speed for standard server tasks.
- You are populating multi-channel memory slots in 16GB increments.
Skip if
- You require higher-density 32GB or 64GB modules.
- You run standard desktop hardware requiring unbuffered DIMMs.
Verdict: SK Hynix 16GB DDR4 2666MHz ECC RDIMM provides error-correcting memory for enterprise server boards that support 2666MHz registered RAM. It serves system administrators expanding compatible multi-channel servers.
Specifications side by side
| Spec | SK Hynix 32GB DDR4-2133 RDIMM | SK Hynix 16GB DDR4-2133 ECC Registered Server Memory | SK Hynix 8GB DDR4 PC4-17000U RAM | SK Hynix 32GB DDR4 ECC Registered Server RAM | SK Hynix 32GB DDR4-2400 ECC REG | SK Hynix 32GB DDR4-2133MHz ECC | SK Hynix 16GB DDR4 ECC Server RAM | SK Hynix 32GB DDR4-2666 ECC REG | SK Hynix 16GB DDR4 2400MHz ECC RDIMM | SK Hynix 64GB DDR4 2666MHz ECC Server RAM | SK Hynix 32GB DDR4-2400 ECC RDIMM | SK Hynix 64GB DDR4 2400MHz ECC LRDIMM | SK Hynix 16GB DDR4 2133MHz Desktop RAM | SK Hynix 32GB DDR4 ECC RDIMM | SK Hynix 16GB DDR4 2666MHz ECC RDIMM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Capacity | 32GB | 16GB | 8 GB | 32 GB | 32GB | 32GB | 16Gb | 32GB | 16GB | 64GB | 32GB | 64GB | 16GB | 32GB | 16GB |
| Memory Speed | 2133 MHz | 2133 MHz | not specified | 2133MHz | 2400MHz | 2133MHz | 2133Mhz | 2666MHz | 2400MHz | 2666MHz | 2400MHz | 2400MHz | 2133MHz | 2666 MT/s | 2666 MT/s |
| CAS Latency | not specified | CL13 | not specified | CL15 | not specified | not specified | not specified | not specified | CL17 | CL19 | not specified | CL 17 | not specified | not specified | CL19 |
| Voltage | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 1.2V | 1.20 V | not specified | 1.2V | not specified | not specified | not specified |
| Module Configuration | 1x32GB | not specified | 1x8GB | not specified | not specified | not specified | 1X16gb | not specified | 1x16GB | 1x64GB | not specified | not specified | 2Rx8 | not specified | not specified |
| Form Factor | U-DIMM | not specified | not specified | not specified | DIMM | not specified | not specified | DIMM | not specified | not specified | RDIMM | Load Reduced | not specified | RDIMM | RDIMM |
| ECC Support | ECC RDIMM | ECC REG | not specified | ECC/Reg | ECC REG | ECC | Ecc Registered | ECC REG | ECC REG | ECC/REG | ECC | ECC/REG | not specified | ECC | ECC |
| Height | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 4 inches | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Compatible Device | not specified | Server | not specified | Server | Server | not specified | Server | not specified | not specified | Server | not specified | Server | Desktop | not specified | Server |
| Size | 32GB | 16GB | 8GB | 32GB | 32GB | 32GB | 16GB | 32GB | 16GB | 64GB | 32GB | 64GB | 16GB | 32GB | 16GB |
| Dimensions | 5.25 × 0.16 × 1.21 inches | not specified | 5.25 × 0.15 × 1.21 inches | not specified | 6 × 1 × 0.2 inches | not specified | 5.25 × 0.16 × 1.21 inches | 9 × 6 × 4 inches | not specified | 9 × 6 × 4 inches | 9 × 6 × 1 inches | 9 × 6 × 1 inches | not specified | 9 × 6 × 4 inches | not specified |
| Weight | 1.12 ounces | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 1.12 ounces | not specified | not specified | not specified | not specified |
| Model | HMA84GL7MMR4N-TF | HMA42GR7MFR4N-TF | HMA41GU6AFR8N-TF | not specified | HMA84GR7MFR4N-UH | AMZ: HMA84GR7MFR4N-TF.Hynix | HMA42GR7AFR4N-TF | HMA84GR7AFR4N-VK | 8541593987 | HMAA8GL7AMR4N-VK | HMA84GR7AFR4N-UH | HMAA8GL7MMR4N-UH | not specified | 8541594394 | HMA82GR7AFR8N-VK |
| Color | not specified | not specified | Multicolor | not specified | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor |
SK Hynix DDR4 RAM Grouped
You can sort these 15 SK Hynix kits by their target hardware and error correction needs. Server-focused modules like the SK Hynix 32GB DDR4-2133 RDIMM and the SK Hynix 64GB DDR4 2666MHz ECC Server RAM offer registered ECC support for enterprise stability. These are ideal for administrators managing dual-rank multi-channel configurations that require verified data integrity. The SK Hynix 16GB DDR4-2400 ECC RDIMM provides a balanced 1.2V profile for standard server upgrades. Desktop users who do not need error correction might prefer the SK Hynix 16GB DDR4 2133MHz Desktop RAM. This non-ECC option fits general office or home computing tasks where high capacity is unnecessary. You should match your board’s supported form factor and speed to ensure compatibility. Registered DIMMs require specific server slots, while standard modules fit consumer motherboards. Check your system’s maximum supported frequency before purchasing any of these kits.
Where SK Hynix Fits
SK Hynix offers a broad DDR4 range for both desktops and servers. You can choose from 8GB desktop modules up to 64GB enterprise LRDIMMs. Most server options feature ECC and registered formats. Capacities step from 8GB to 64GB in standard increments. You will find speeds from 2133MHz to 2666MHz. The lineup lacks high-frequency options above 2666MHz. You also will not find non-ECC server memory here. If you need speeds higher than 2666MHz or require non-ECC server modules, this brand does not currently cover those specific needs.
To ensure memory kit compatibility, you can compare slot limits and supported speeds across the best DDR4 motherboards.
How to choose the right one
-
Check compatible device
You must match the memory to your hardware type. The SK Hynix 16GB DDR4 2133MHz Desktop RAM is designed for standard personal computers. It lacks error correction, which is fine for home use. In contrast, most other models in this list are built for servers. They include ECC support to prevent data corruption. Always verify your motherboard or server board requirements before purchasing. Using desktop RAM in a server can cause instability. Using server RAM in a desktop may result in compatibility failures. Choose the correct category for your specific system architecture.
-
Verify ECC support
Error Correction Code memory is critical for server environments. Most items here, such as the SK Hynix 32GB DDR4-2133 RDIMM, feature ECC. This technology detects and fixes single-bit memory errors automatically. It ensures data integrity during long-running tasks. If you are building a workstation or server, this feature is essential. The SK Hynix 16GB DDR4 2133MHz Desktop RAM does not have this capability. It is suitable only for non-critical desktop applications. Always check the attributes list to confirm ECC presence. Do not assume all DDR4 modules include this protection.
-
Match memory speed
Speed determines how fast data moves between memory and the processor. Options range from 2133MHz to 2666MHz. The SK Hynix 32GB DDR4-2666 ECC REG offers higher throughput than the 2133MHz models. However, your motherboard must support the higher frequency to realize the benefit. The SK Hynix 16GB DDR4-2400 ECC RDIMM provides a middle ground at 2400MHz. Faster speeds do not always mean better performance if the system bus is slower. Check your system specifications to ensure the RAM speed is compatible with your CPU and chipset limitations.
-
Select proper form factor
Form factor dictates physical fit and electrical signaling. Registered DIMMs (RDIMM) and Load Reduced DIMMs (LRDIMM) are common in servers. The SK Hynix 64GB DDR4 2400MHz ECC LRDIMM uses load-reduced signaling for high-density stability. Standard RDIMMs, like the SK Hynix 32GB DDR4-2133 RDIMM, are widely compatible. Desktop modules use Unbuffered DIMMs, which are not listed here. You cannot mix RDIMM and UDIMM in the same channel. Ensure the physical length and notch position match your motherboard slots. Incorrect form factors will not fit or function.
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Consider capacity needs
Capacity determines how much data you can hold in active memory. Sizes range from 8GB to 64GB per stick. The SK Hynix 8GB DDR4 PC4-17000U RAM is ideal for basic desktop upgrades. For heavy server workloads, the SK Hynix 64GB DDR4 2666MHz ECC Server RAM provides significant density. Larger capacities allow more applications to run simultaneously without swapping to disk. However, higher density modules may have stricter compatibility requirements. Check your motherboard’s maximum supported capacity per slot. Balance your total system memory needs with individual stick sizes for optimal performance.
Frequently asked questions
Does SK Hynix DDR4 RAM support ECC?
Many SK Hynix DDR4 modules include Error Correction Code support, particularly those designed for server environments. Models like the 32GB DDR4-2133 RDIMM and the 16GB DDR4-2400 ECC RDIMM explicitly list ECC in their attributes. However, desktop-specific options such as the 16GB DDR4 2133MHz Desktop RAM do not feature this capability. You should check the product specifications to confirm if error correction is included for your specific hardware needs.
What is the highest capacity available in this list?
The highest capacity available in this comparison is 64GB. You can find 64GB modules like the SK Hynix 64GB DDR4 2666MHz ECC Server RAM and the 64GB DDR4 2400MHz ECC LRDIMM. These high-density options are tailored for enterprise servers requiring substantial memory per slot. Standard desktop or smaller server kits typically max out at 32GB or 16GB in this specific lineup.
Which SK Hynix DDR4 RAM is best for desktops?
The SK Hynix 16GB DDR4 2133MHz Desktop RAM is the only option explicitly designated for standard personal computers. It provides adequate capacity for general office or home computing tasks without requiring server-grade error correction. Other models in this list, such as the 8GB PC4-17000U RAM, are also suitable for basic desktop upgrades but lack the specific desktop classification of the 16GB module.
What is the fastest speed offered by SK Hynix in this guide?
The fastest speed offered in this list is 2666MHz. You can find this speed in several models, including the 32GB DDR4-2666 ECC RDIMM and the 64GB DDR4 2666MHz ECC Server RAM. These modules provide higher throughput compared to the more common 2133MHz and 2400MHz options. Ensure your server hardware explicitly supports 2666MHz registered DIMMs before purchasing.
Are all SK Hynix DDR4 modules registered DIMMs?
No, not all modules are registered. While most server-focused options like the 32GB DDR4-2133 RDIMM are registered, some desktop variants are not. The SK Hynix 16GB DDR4 2133MHz Desktop RAM is designed for standard PCs and does not use registered architecture. Additionally, the 8GB DDR4 PC4-17000U RAM is a standard module for everyday systems. Always verify the form factor for your specific motherboard compatibility.
What is the lowest voltage used in these SK Hynix RAM kits?
The lowest voltage specified in this list is 1.20V. The 64GB DDR4 2666MHz ECC Server RAM operates at 1.20V, which is standard for modern DDR4 memory. The 16GB DDR4-2400 ECC RDIMM also maintains a standard 1.2V power profile. Using lower voltage modules can contribute to better power efficiency in compatible server platforms without sacrificing stability or error correction features.