SK Hynix ddr5 RAMs: 15 Picks Ranked by Specs
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When you shop for SK Hynix ddr5 RAM, checking hardware specifications helps you pick the right module for your system. This guide compares 15 products based strictly on the specifications published on their listings.
The lineup features capacities from 8GB to 64GB in DIMM, SODIMM, and RDIMM form factors for laptops, desktops, and enterprise servers. The SK Hynix 16GB DDR4-2133 ECC Registered Server Memory holds the top position because it provides registered DDR4-2133 memory with CL13 latency for compatible server hardware.
Quick picks
Our 15 picks
SK Hynix 16GB DDR4-2133 ECC Registered Server Memory
Best for: DDR4 servers requiring ECC registered memory
- Capacity
- 16GB
- Memory Speed
- 2133MHz
- 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 designed specifically for server platforms. Key specifications include registered ECC support, a DDR4-2133 transfer speed, and a CL13 latency rating. Because it uses registered error-correcting code architecture, this memory targets stable infrastructure systems rather than consumer desktop computers. It suits you if your server motherboard requires DDR4-2133 RDIMMs for enterprise workloads.
Pros
- 16GB module capacity
- ECC registered error correction
- CL13 latency specification
- Designed for dedicated server platforms
Cons
- Compatible only with servers, not standard consumer PCs
- DDR4-2133 frequency is lower than later DDR4 revisions
Good fit if
- You need 16GB ECC registered memory for a compatible server motherboard.
- You require DDR4-2133 modules with a CL13 latency profile.
Skip if
- You need standard unbuffered RAM for a desktop PC or laptop.
- You require newer DDR5 memory or faster DDR4 frequencies.
Verdict: SK Hynix 16GB DDR4 ECC Server RAM provides 16GB of registered DDR4-2133 memory with CL13 latency for compatible server hardware. It delivers error-correcting stability for enterprise systems requiring this specific module type.
SK Hynix 8GB DDR4 PC4-17000U RAM
Best for: basic 8GB PC4-17000 DDR4 system replacements
- Capacity
- 8gb
- Dimensions
- 5.25 × 0.15 × 1.21 inches
This SK Hynix module gives you 8GB of DDR4 memory running at PC4-17000 specifications. Built with a 2Rx8 rank architecture, it measures 5.25 inches long and 1.21 inches high, fitting standard setups that accept full-length memory. It suits you if you need a straightforward 8GB replacement module or a basic system memory upgrade that matches PC4-17000 DDR4 requirements without exceeding standard dimensions.
Pros
- 8GB DDR4 capacity
- PC4-17000 operating speed rating
- Dual-rank 2Rx8 configuration
- Compact 1.21-inch module height
Cons
- Single 8GB module rather than a multi-channel kit
- DDR4 generation rather than newer DDR5 standard
- PC4-17000 transfer rate is slower than higher-tier DDR4 options
Good fit if
- You need a single 8GB DDR4 PC4-17000 replacement stick.
- You have clearance for a standard 1.21-inch module height.
- You specifically require a 2Rx8 dual-rank memory layout.
Skip if
- You need high-density memory greater than 8GB per slot.
- You operate a motherboard that requires DDR5 modules.
- You want higher-frequency DDR4 memory than PC4-17000.
Verdict: SK Hynix 8GB DDR4 PC4-17000 Memory delivers standard 8GB capacity in a 2Rx8 configuration for systems matching its PC4-17000 specification. It offers a direct match when replacing or matching standard DDR4 memory of this exact profile.
SK Hynix 8GB Dual Rank Module
Best for: systems requiring 8GB PC4-2133P 2Rx8 memory
- Capacity
- 8GB
- Kit Configuration
- 1X8GB
- Dimensions
- 9 × 6 × 1 inches
This SK Hynix memory module gives you 8GB of system memory across a single stick. It uses a 2Rx8 dual-rank setup and operates at the PC4-2133P specification standard. If you maintain or build a workstation or system that specifies 2133 MT/s transfer rates and 8GB DIMM increments, this module matches those exact hardware parameters without extra overhead.
Pros
- 8GB single-module capacity (1x8GB)
- PC4-2133P speed specification
- Dual-rank 2Rx8 configuration
Cons
- Modest 8GB capacity for memory-heavy setups
- PC4-2133 speed rating is lower than faster DDR4 standards
Good fit if
- You need a single 8GB 2Rx8 module for your system.
- You specifically require PC4-2133P speed memory.
Skip if
- You need larger capacities like 16GB, 32GB, or 64GB modules.
- You require higher clock frequencies such as 2666MHz or 3200MHz.
Verdict: SK Hynix 8GB PC4-2133P Memory Module provides a standard 8GB single-stick capacity with a 2Rx8 rank configuration. It serves systems that require baseline PC4-2133P operating speeds.
SK Hynix 32GB DDR4 ECC Registered Server RAM
Best for: servers requiring 32GB DDR4 CL15 ECC memory
- Capacity
- 32GB
- CAS Latency
- CL15
- ECC Support
- ECC/Reg
- Compatible Device
- Server
View on Amazon: SK Hynix 32GB DDR4 ECC Registered Server RAM
This SK Hynix server module gives you 32GB of DDR4 memory running at 2133MHz. It features a CL15 CAS latency alongside registered ECC error correction. If you operate server hardware requiring stable data integrity at standard 2133MHz transfer rates, this memory fits your setup. It provides balanced latency for enterprise server boards that support 32GB registered DDR4 modules, giving you reliable capacity without unneeded desktop features.
Pros
- 32GB module capacity
- CL15 CAS latency
- Registered ECC error correction support
- DDR4-2133 transfer speed
Cons
- Compatible only with server hardware
- Base 2133MHz DDR4 operating speed
Good fit if
- You need 32GB of registered ECC DDR4 memory for a server.
- You target CL15 latency at 2133MHz transfer rates.
Skip if
- You need non-ECC memory for a standard desktop motherboard.
- You require memory speeds higher than DDR4-2133.
Verdict: SK Hynix 32GB DDR4-2133 CL15 Server RAM provides dependable server memory with CL15 latency and ECC support. It delivers 32GB of capacity for enterprise systems built around DDR4-2133 specifications.
SK Hynix 16GB DDR4 ECC Server RAM
Best for: server setups requiring 2133MHz ECC memory
- Capacity
- 16Gb
- Memory Speed
- 2133Mhz
- Kit 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 designed for server systems. It runs at a speed of 2133MHz and includes ECC support for data integrity. The module measures 5.25 inches long and 1.21 inches high. You get dedicated server memory for hardware builds that require PC4-17000 operating speeds. It fits your system if you maintain compatible server platforms.
Pros
- 16GB module capacity
- 2133MHz operating speed
- Built-in ECC support
- Dedicated server compatibility
Cons
- Compatible only with server devices
- Base 2133MHz clock speed
Good fit if
- You need 16GB of ECC memory for a server.
- You operate hardware rated for 2133MHz memory speeds.
Skip if
- You are building a standard desktop PC.
- You need memory speeds faster than 2133MHz.
Verdict: SK Hynix 16GB 2133MHz ECC Server RAM provides 16GB of capacity at 2133MHz for compatible systems. It functions as a focused replacement or expansion unit for ECC-supported server hardware.
SK Hynix 16GB DDR4 2400MHz ECC RDIMM
Best for: 1.2V DDR4-2400 ECC server setups
- Capacity
- 16GB
- Memory Speed
- 2400
- CAS Latency
- CL17
- Form Factor
- 288-PIN RDIMM
- Voltage
- 1.2V
- ECC Support
- ECC REG RDIMM
This SK Hynix 16GB module is a registered ECC DDR4 server memory stick operating at 2400 MHz. It runs at standard 1.2V with CL17 CAS latency and a dual-rank 2Rx8 layout on a 288-pin RDIMM board. You get built-in error correction and stability tailored for enterprise servers. It suits your build if you maintain DDR4-2400 server hardware requiring registered ECC memory.
Pros
- Standard 1.2V operational voltage
- ECC registered RDIMM architecture for error correction
- Dual-rank 2Rx8 module configuration
- Standard 288-pin DDR4-2400 speed with CL17 latency
Cons
- DDR4-2400 speed is slower than DDR4-2666 or DDR4-3200 options
- Registered RDIMM form factor is incompatible with standard desktop motherboards
Good fit if
- You need a 16GB registered ECC DDR4 module for an RDIMM-compatible server.
- You maintain hardware designed specifically for 1.2V DDR4-2400 CL17 memory.
Skip if
- You use consumer desktop or laptop systems requiring unbuffered DIMMs or SO-DIMMs.
- You need higher bandwidth DDR4-2666, DDR4-2933, or DDR4-3200 modules.
Verdict: SK Hynix 16GB DDR4-2400 ECC RDIMM provides reliable error-correcting memory at standard 1.2V power for compatible enterprise server platforms.
SK Hynix 64GB DDR4 2666MHz ECC Server RAM
Best for: high-density DDR4 server memory upgrades
- Capacity
- 64 GB
- Memory Speed
- 2666 MHz
- CAS Latency
- CL 19
- Kit Configuration
- 1 x 64GB
- Voltage
- 1.20 V
- ECC Support
- ECC/REG
This SK Hynix module gives you 64 GB of DDR4 SDRAM capacity on a single stick. It operates at a memory speed of 2666 MHz with CL19 CAS latency and standard 1.20 V power. Designed for servers, this load-reduced memory includes ECC support to protect against data errors. It suits you if you need large-capacity DDR4 memory modules for enterprise server infrastructure.
Pros
- 64 GB density in a single module
- 2666 MHz memory speed
- Hardware ECC support
- 1.20 V operating voltage
Cons
- CL19 CAS latency
- Server-only compatibility
- DDR4 standard instead of DDR5
Good fit if
- You need 64 GB capacity on a single server module.
- You require ECC support for data integrity.
- Your server board supports 2666 MHz DDR4 memory.
Skip if
- You need DDR5 memory for newer motherboards.
- You build on standard desktop or laptop hardware.
Verdict: SK Hynix 64GB DDR4 2666MHz Load Reduced Server RAM delivers 64 GB of ECC-supported DDR4 memory for compatible server hardware. It provides high-density 1.20 V operation for systems running at 2666 MHz.
SK Hynix 64GB DDR4 2400MHz ECC LRDIMM
Best for: high-density enterprise DDR4 server memory expansion
- Capacity
- 64GB
- Memory Speed
- 2400MHz
- CAS Latency
- CL 17
- Form Factor
- 288 Pin
- Voltage
- 1.2V
- ECC Support
- ECC
This SK Hynix module is a 64GB DDR4 server memory stick operating at 2400MHz with CL17 CAS latency. Built as a 288-pin load-reduced module with ECC support and a 4Rx4 rank design, it draws 1.2V. If you need substantial single-slot density for a compatible server motherboard and require error correction, this high-capacity module gives you reliable operation under continuous enterprise workloads.
Pros
- High 64GB single-module capacity
- Load-reduced ECC design with 4Rx4 rank
- Standard 1.2V operating voltage
- CL17 latency at 2400MHz speed
Cons
- Limited to 2400MHz transfer speed
- Requires server hardware supporting LRDIMM modules
Good fit if
- You need 64GB of memory in a single server slot.
- You run a server motherboard that supports 288-pin DDR4 LRDIMM modules.
Skip if
- You require faster DDR4 speeds beyond 2400MHz.
- You build a standard desktop system that uses unbuffered memory.
Verdict: SK Hynix 64GB DDR4 2400MHz ECC LRDIMM Server RAM delivers high memory density with error checking for enterprise server environments. It provides dependable 1.2V operation for platforms designed specifically for load-reduced hardware.
SK Hynix 32GB DDR4 ECC RDIMM
Best for: ECC-compatible DDR4 server upgrades
- Capacity
- 32GB
- Form Factor
- RDIMM
- ECC Support
- Registered ECC
- Dimensions
- 9 × 6 × 4 inches
This SK Hynix module provides 32GB of DDR4 memory running at PC4-2666V (2666MHz). It is an RDIMM server memory stick built with ECC support and a 2Rx4 rank configuration. If you need registered memory for compatible server hardware, this unit gives you error-correcting capability and standard 2666MHz DDR4 bandwidth for your setup.
Pros
- 32GB capacity
- ECC support for error correction
- PC4-2666V (PC4-21300) operating speed
- Registered RDIMM server form factor
Cons
- DDR4 technology rather than newer DDR5
- RDIMM form factor is incompatible with standard desktop motherboards
Good fit if
- You need 32GB of registered ECC DDR4 server memory.
- You run a server platform supporting PC4-2666V RDIMMs.
Skip if
- You need unbuffered memory for a standard consumer desktop.
- You require newer DDR5 memory modules.
Verdict: SK Hynix 32GB DDR4 2666MHz ECC RDIMM delivers registered server memory with error correction for compatible PC4-2666V systems. It provides 32GB of capacity in a 2Rx4 configuration.
SK Hynix 16GB DDR4 2666MHz ECC RDIMM
Best for: DDR4 server platforms needing registered ECC memory
- Capacity
- 16GB
- Memory Speed
- 2666MHz
- 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 2666MHz. It uses a registered RDIMM form factor with ECC support to correct data errors and ensure system stability. With a CL19 CAS latency and a 2Rx8 rank configuration, it suits server hardware requiring registered DDR4 modules. If you need standard desktop memory or unbuffered modules, this registered server stick is not built for your board.
Pros
- 16GB DDR4 capacity
- 2666MHz speed rating (PC4-21300)
- ECC RDIMM form factor for server stability
- CL19 CAS latency
Cons
- Incompatible with desktop motherboards requiring unbuffered DIMMs
- Limited to DDR4-2666 operating speed
Good fit if
- You run a server motherboard that requires DDR4 ECC registered RDIMMs.
- You need 16GB of PC4-21300 memory running at CL19 latency.
Skip if
- You build a standard desktop computer requiring unbuffered memory.
- You require DDR5 system memory rather than DDR4.
Verdict: SK Hynix 16GB DDR4 ECC RDIMM provides reliable error-correcting memory at 2666MHz with CL19 timings. It is built strictly for enterprise and server platforms that support registered modules.
SK Hynix 16GB 2666MHz DDR4 SODIMM
Best for: laptop upgrades requiring 2666MHz DDR4 SODIMM
- Capacity
- 16GB
- Memory Speed
- 2666MHZ
- Form Factor
- SO-DIMM
- Dimensions
- 9 × 6 × 1 inches
This SK Hynix module provides 16GB of DDR4 memory designed for compact systems using the SODIMM form factor. It operates at an effective speed of 2666MHz, utilizing a dual-rank 2Rx8 configuration. You get standard PC4-21300 performance suited for laptops, small-form-factor PCs, or portable setups needing a single-stick 16GB capacity boost. It suits users looking for a direct DDR4 SODIMM replacement running at standard 2666MHz clock speeds.
Pros
- 16GB capacity in a single module
- 2666MHz memory speed (PC4-21300)
- Compact SODIMM form factor
- Dual-rank 2Rx8 configuration
Cons
- DDR4 generation rather than DDR5
- SODIMM design does not fit standard desktop DIMM slots
- Capped at 2666MHz clock speed
Good fit if
- You need a 16GB DDR4 upgrade for a SODIMM-compatible laptop or mini PC.
- You require a module rated for 2666MHz (PC4-21300) speeds.
Skip if
- You need standard full-size desktop DIMM slots.
- You require DDR5 memory or speeds faster than 2666MHz.
Verdict: SK Hynix 16GB 2666MHz DDR4 SODIMM delivers standard 2666MHz speed in a single 16GB laptop-friendly format. It provides dependable DDR4 memory for compatible SODIMM devices.
SK Hynix 32GB DDR4 ECC RDIMM
Best for: Enterprise servers requiring 2933MHz DDR4 ECC memory
- Capacity
- 32GB
- Memory Speed
- PC4-2933Y
- Form Factor
- RDIMM
- ECC Support
- ECC
- Compatible Device
- Server
This module is a single 32GB DDR4 registered memory stick designed for server systems. It runs at PC4-2933Y speeds, providing 2933 MT/s data rates with dedicated ECC error correction for stability. Its 2Rx4 dual-rank RDIMM architecture targets enterprise workloads requiring dependable data integrity. Choose this if you operate compatible server hardware and need reliable high-capacity DDR4 memory with built-in hardware error handling.
Pros
- 32GB capacity on a single module
- PC4-2933Y speed rating
- Registered ECC error correction
- 2Rx4 dual-rank configuration
Cons
- Server-only RDIMM form factor incompatible with standard desktops
- DDR4 generation rather than DDR5
Good fit if
- You manage compatible server infrastructure needing 32GB RDIMM modules.
- You need PC4-2933Y transfer speeds with active ECC error checking.
Skip if
- You need memory for a standard consumer desktop or laptop.
- You need next-generation DDR5 memory platforms.
Verdict: SK Hynix 32GB DDR4 ECC RDIMM delivers high-capacity server memory with PC4-2933Y speeds and hardware error correction. It suits enterprise server upgrades requiring verified dual-rank DDR4 stability.
SK Hynix 8GB 2666MHz DDR4 SODIMM
Best for: laptop systems requiring 2666MHz DDR4 SODIMM memory
- Capacity
- 8GB
- Memory Speed
- 2666MHZ
- Form Factor
- SO-DIMM
- Dimensions
- 9 × 6 × 4 inches
This memory module is an SK Hynix 8GB DDR4 SODIMM designed for compact systems. It operates at a memory speed of 2666MHz under the PC4-21300 standard. The single module features a 1Rx8 configuration in a compact SODIMM form factor. You will find this module suitable if you need standard-speed 2666MHz memory for a laptop or small form factor system that accepts DDR4 SODIMMs.
Pros
- 2666MHz operating speed
- SODIMM form factor for compact devices
- 8GB capacity on a single stick
- Standard 1Rx8 module design
Cons
- Limited to 8GB capacity per module
- Not compatible with standard desktop DIMM slots
- Lower transfer speed than 3200MHz DDR4 options
Good fit if
- You need an 8GB DDR4 SODIMM for a laptop or mini PC.
- You require a module rated for 2666MHz operating frequency.
Skip if
- You need a standard full-size desktop DIMM.
- You require DDR5 memory technology.
Verdict: SK Hynix 8GB DDR4 2666MHz SODIMM provides a direct memory replacement for notebook platforms supporting PC4-21300 modules. It provides standard 2666MHz speed in an 8GB compact form factor.
SK Hynix 8GB DDR4 3200MHz DIMM
Best for: desktop DDR4 systems needing 3200MHz memory
- Capacity
- 8GB
- Memory Speed
- 3200MHz
- Kit Configuration
- 8GB x 1
- Form Factor
- 288-Pin DIMM
This SK Hynix module gives you 8GB of DDR4 memory running at a 3200MHz clock speed. Built as a standard 288-pin DIMM using the PC4-25600 standard, it is designed for standard desktop motherboards rather than laptops or compact systems. If you need a straightforward single-stick replacement or want to add memory to an existing desktop setup that supports 3200MHz DDR4, this single module fits standard 288-pin DIMM slots directly.
Pros
- 3200MHz operating speed
- Standard 288-pin desktop DIMM form factor
- PC4-25600 memory standard
- Backed by a limited lifetime warranty
Cons
- Single 8GB module provides limited total capacity
- DDR4 standard is incompatible with DDR5-only motherboards
- 288-pin DIMM does not fit laptop SO-DIMM slots
Good fit if
- You need a single 8GB DDR4 module rated at 3200MHz.
- You have a desktop system with an open 288-pin DIMM slot.
Skip if
- You need DDR5 memory for a newer generation motherboard.
- You are upgrading a laptop that requires SO-DIMM memory.
Verdict: SK Hynix 8GB DDR4 3200MHz DIMM provides standard desktop memory speed and capacity in a single 288-pin module. It suits desktop owners needing a basic 3200MHz DDR4 replacement or upgrade.
SK Hynix 8GB DDR4 3200MHz SODIMM Laptop RAM
Best for: DDR4 laptop memory upgrades and replacements
- Capacity
- 8GB
- Form Factor
- SODIMM
- ECC Support
- Non ECC Unbuffered
- Compatible Device
- Laptop
- Dimensions
- 2.66 × 1.18 × 0.15 inches
This SK Hynix module is a single 8GB DDR4 memory stick designed for laptops and portable computers. It runs at DDR4-3200 speeds using a compact SODIMM form factor. The module features a 1Rx16 memory organization and operates as non-ECC unbuffered memory. It suits you if you need to expand a compatible laptop that accepts standard DDR4 SODIMM hardware.
Pros
- DDR4-3200 memory speed
- Compact SODIMM form factor for laptops
- Non-ECC unbuffered architecture for standard notebook compatibility
- Single-rank 1Rx16 configuration
Cons
- DDR4 generation rather than newer DDR5 standard
- Limited to 8GB capacity per module
- Non-ECC design lacks server-grade error correction
Good fit if
- You need an 8GB DDR4-3200 SODIMM module for your laptop.
- You own a notebook that requires non-ECC unbuffered memory.
Skip if
- You need a DDR5 memory module for newer platforms.
- You require ECC registered memory for server hardware.
Verdict: SK Hynix 8GB DDR4 3200MHz SODIMM Laptop RAM delivers standard DDR4-3200 speeds in an 8GB non-ECC unbuffered format. It fits laptops engineered for portable DDR4 SODIMM modules.
Specifications side by side
| Spec | SK Hynix 16GB DDR4-2133 ECC Registered Server Memory | SK Hynix 8GB DDR4 PC4-17000U RAM | SK Hynix 8GB Dual Rank Module | SK Hynix 32GB DDR4 ECC Registered Server RAM | SK Hynix 16GB DDR4 ECC Server RAM | SK Hynix 16GB DDR4 2400MHz ECC RDIMM | SK Hynix 64GB DDR4 2666MHz ECC Server RAM | SK Hynix 64GB DDR4 2400MHz ECC LRDIMM | SK Hynix 32GB DDR4 ECC RDIMM | SK Hynix 16GB DDR4 2666MHz ECC RDIMM | SK Hynix 16GB 2666MHz DDR4 SODIMM | SK Hynix 32GB DDR4 ECC RDIMM | SK Hynix 8GB 2666MHz DDR4 SODIMM | SK Hynix 8GB DDR4 3200MHz DIMM | SK Hynix 8GB DDR4 3200MHz SODIMM Laptop RAM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity | 16GB | 8gb | 8GB | 32GB | 16Gb | 16GB | 64 GB | 64GB | 32GB | 16GB | 16GB | 32GB | 8GB | 8GB | 8GB |
| Memory Speed | 2133MHz | not specified | not specified | not specified | 2133Mhz | 2400 | 2666 MHz | 2400MHz | not specified | 2666MHz | 2666MHZ | PC4-2933Y | 2666MHZ | 3200MHz | not specified |
| CAS Latency | CL13 | not specified | not specified | CL15 | not specified | CL17 | CL 19 | CL 17 | not specified | CL19 | not specified | not specified | not specified | not specified | not specified |
| Kit Configuration | not specified | not specified | 1X8GB | not specified | 1X16gb | not specified | 1 x 64GB | not specified | not specified | not specified | not specified | not specified | not specified | 8GB x 1 | not specified |
| Form Factor | not specified | not specified | not specified | not specified | not specified | 288-PIN RDIMM | not specified | 288 Pin | RDIMM | RDIMM | SO-DIMM | RDIMM | SO-DIMM | 288-Pin DIMM | SODIMM |
| Voltage | not specified | not specified | not specified | not specified | not specified | 1.2V | 1.20 V | 1.2V | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| ECC Support | ECC/REG | not specified | not specified | ECC/Reg | Ecc Registered | ECC REG RDIMM | ECC/REG | ECC | Registered ECC | ECC | not specified | ECC | not specified | not specified | Non ECC Unbuffered |
| Compatible Device | Server | not specified | not specified | Server | Server | not specified | Server | Server | not specified | Server | not specified | Server | not specified | not specified | Laptop |
| Size | 16GB | 8GB | 8GB | 32GB | 16GB | 16GB | 64GB | 64GB | 32GB | 16GB | 16GB | 32GB | 8GB | 8GB | 8GB |
| Dimensions | not specified | 5.25 × 0.15 × 1.21 inches | 9 × 6 × 1 inches | not specified | 5.25 × 0.16 × 1.21 inches | not specified | 9 × 6 × 4 inches | 9 × 6 × 1 inches | 9 × 6 × 4 inches | not specified | 9 × 6 × 1 inches | not specified | 9 × 6 × 4 inches | not specified | 2.66 × 1.18 × 0.15 inches |
| Model | HMA42GR7MFR4N-TF | HMA41GU6AFR8N-TF | HMA41GR7MFR8N-TF | not specified | HMA42GR7AFR4N-TF | 8541593987 | HMAA8GL7AMR4N-VK | HMAA8GL7MMR4N-UH | 8541594394 | HMA82GR7AFR8N-VK | HMA82GS6JJR8N | HMA84GR7CJR4N-WM | HMA81GS6JJR8N | HMA81GU6DJR8N-XN | HMAA1GS6CJR6N-XN |
| Color | not specified | Multicolor | Multicolor | not specified | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | Multicolor | not specified | Green |
SK Hynix Lineup at a Glance
Enterprise builds split by registered form factor and error correction. If you run server hardware, choose ECC modules like the SK Hynix 16GB DDR4-2133 ECC Registered Server Memory or high-capacity options like the SK Hynix 64GB DDR4 2666MHz ECC Server RAM. These RDIMM options offer speeds from 2133MHz to 2933MHz at 1.2V with latencies between CL13 and CL19.
Client devices divide strictly by form factor. For desktop builds requiring speeds up to 3200MHz, select the SK Hynix 8GB DDR4 3200MHz DIMM. If you upgrade a notebook, pick compact SODIMM options like the SK Hynix 8GB DDR4 3200MHz SODIMM Laptop RAM. These consumer sticks deliver 8GB to 16GB capacities at 2666MHz and 3200MHz.
Where the SK Hynix Range Fits
This SK Hynix selection suits you if you need standard DDR4 memory for enterprise servers, laptops, or basic desktop setups. Capacities range from 8GB sticks up to 64GB high-density modules. Form factors span standard desktop DIMMs, notebook SODIMMs, and enterprise RDIMMs or LRDIMMs. Speeds cover DDR4-2133 through DDR4-3200.
Notable gaps exist across the listed products. None of these memory sticks include DDR5 specifications, heat spreaders, or RGB lighting options. Capacities remain limited to 8GB, 16GB, 32GB, and 64GB units, leaving out ultra-dense modules above 64GB or smaller sizes below 8GB.
If you select bare modules without heat spreaders, you can check specifications for the best heatsinks for RAM to manage your memory temperatures.
Key Specs to Check Before Buying
-
Match the Form Factor
You must match the physical module type to your motherboard slots before purchasing. Laptop systems and compact computers require SODIMM sticks, such as the SK Hynix 8GB DDR4 3200MHz SODIMM Laptop RAM. Standard desktop motherboards take regular DIMMs, while enterprise servers demand registered RDIMM or load-reduced LRDIMM modules. These physical formats are not interchangeable across platforms. Always inspect your hardware documentation to verify whether your board requires desktop DIMMs, server RDIMMs, or notebook SODIMMs before selecting a module for your upgrade.
-
Verify ECC Support Needs
Error-correcting code memory identifies and corrects data corruption in enterprise environments. Modules like the SK Hynix 16GB DDR4-2133 ECC Registered Server Memory are built specifically for compatible server motherboards and enterprise workloads. Consumer desktop boards and laptops generally do not support ECC registered modules and will fail to boot if you install them. Check your processor and motherboard specifications to confirm whether your system requires error-correcting memory. Selecting ECC memory when your board only supports non-ECC unbuffered modules causes complete system incompatibility.
-
Check Memory Operating Frequency
Memory speed dictates data transfer rates and ranges across this lineup from 2133MHz up to 3200MHz. For example, the SK Hynix 8GB DDR4 3200MHz DIMM operates at 3200MHz for matching desktop platforms. You should review your motherboard chipset and processor limits to find their maximum supported memory frequency. While faster modules often downclock to match a slower bus, buying a speed higher than your motherboard allows provides no real performance benefit. Match your system rated speed to ensure stable plug-and-play operation.
-
Compare CAS Latency Ratings
CAS latency indicates the delay in clock cycles before memory delivers requested data. In this selection, timings range from CL13 on lower frequency parts up to CL19 on high-speed units. The SK Hynix 32GB DDR4 ECC Registered Server RAM provides CL15 latency at 2133MHz speeds. When mixing modules or replacing existing hardware, matching CAS latency is essential for system stability. Mismatched latencies can force a motherboard into unstable timings or memory errors. Always inspect your existing stick latency rating to ensure consistent timing profiles.
-
Select Target Module Capacity
Module capacities in this lineup range from basic 8GB units to dense 64GB enterprise hardware. An option such as the SK Hynix 64GB DDR4 2400MHz ECC LRDIMM caters to high-density server configurations with strict slot limits. Everyday tasks and standard replacements run well on 8GB or 16GB sticks, whereas virtualization servers require 32GB or 64GB units per channel. Check the maximum per-slot capacity supported by your motherboard before buying. Older motherboards often cannot address modern high-density 32GB or 64GB individual memory sticks properly.
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Distinguish RDIMM From LRDIMM
Enterprise systems distinguish between registered DIMMs and load-reduced DIMMs. A module like the SK Hynix 16GB DDR4 2400MHz ECC RDIMM uses an onboard register to buffer control signals, while load-reduced LRDIMMs buffer both data lines and control signals. Server motherboards generally prohibit mixing RDIMM and LRDIMM modules across the same memory channels or server banks. Review your server configuration guide and inspect existing installed memory carefully before selecting a module. Choosing the wrong module architecture prevents the server from completing memory initialization during boot.
Frequently asked questions
Are there DDR5 memory modules included in this SK Hynix guide?
You will find DDR4 memory modules in this lineup rather than DDR5 memory. Every product listed in this collection is a DDR4 module spanning speeds from 2133MHz to 3200MHz. DDR4 and DDR5 memory modules feature completely different pin counts and key notches. You cannot insert DDR4 RAM into a motherboard engineered for DDR5 memory.
Can you use SK Hynix ECC RDIMM server RAM in a standard desktop PC?
You cannot run ECC registered memory (RDIMM) on standard consumer desktop motherboards. Models like the SK Hynix 16GB DDR4 2666MHz ECC RDIMM or 32GB DDR4 ECC RDIMM require enterprise processors and server chipsets. Standard consumer motherboards require unbuffered DIMMs and will not post or boot if you insert registered server modules.
What is the difference between RDIMM and LRDIMM SK Hynix modules?
LRDIMMs utilize memory buffer chips to lower electrical load on the system memory controller compared to standard RDIMMs. The SK Hynix 64GB DDR4 2400MHz ECC LRDIMM uses load-reduction hardware to deliver high capacity at 1.2V. RDIMMs register control signals, whereas LRDIMMs buffer both control and data lines. You cannot mix RDIMM and LRDIMM modules together in the same system.
What operating speeds do these SK Hynix DDR4 memory kits offer?
The published speeds for these SK Hynix DDR4 modules run between 2133MHz and 3200MHz. Base server units operate at 2133MHz, while other enterprise sticks run at 2400MHz, 2666MHz, and 2933MHz. The fastest modules in this lineup, such as the SK Hynix 8GB DDR4 3200MHz DIMM and SODIMM, run at 3200MHz. Check your motherboard manual to ensure frequency support.
Which SK Hynix modules fit notebook computers?
You must choose SODIMM form factor modules when upgrading laptop memory. This lineup includes the SK Hynix 16GB 2666MHz DDR4 SODIMM, 8GB 2666MHz DDR4 SODIMM, and 8GB DDR4 3200MHz SODIMM Laptop RAM for notebook systems. Standard desktop DIMMs and enterprise RDIMMs use longer physical designs that cannot fit inside laptop expansion slots.
What voltage do these SK Hynix DDR4 RAM modules require?
These SK Hynix DDR4 memory modules function at the JEDEC standard DDR4 voltage of 1.2V. Published specifications for products like the SK Hynix 16GB DDR4 2400MHz ECC RDIMM and 64GB DDR4 2400MHz ECC LRDIMM confirm 1.2V power requirements. This baseline voltage delivers reliable thermal efficiency without requiring elevated motherboard voltage configurations.
What CAS latency values do these SK Hynix modules provide?
The CAS latency ratings across these SK Hynix modules vary between CL13 and CL19 depending on operational speed. For example, the SK Hynix 16GB DDR4-2133 ECC Registered Server Memory provides CL13 latency, and the 32GB DDR4-2133 model features CL15. Higher-frequency units, like the 16GB 2666MHz ECC RDIMM, specify CL19 latency to maintain signal integrity.