6 Best Alternatives to the SK Hynix Gold S31 500GB SATA (2026)
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The SK Hynix Gold S31 500GB SATA SSD offers reliable performance with sequential read speeds up to 560MB/s and write speeds up to 525MB/s. If you are looking for sk hynix gold s31 500gb sata alternatives, you might want a different capacity, cache type, or brand. Some users prefer drives with dedicated DRAM for better sustained performance, while others need higher endurance ratings for specific workloads. The SK Hynix model includes a 5-year warranty and HYPERWRITE cache technology, which appeals to those prioritizing stability and long-term reliability over raw speed.
The alternatives listed here were chosen because their specifications overlap with the original drive. You will find options that match the 2.5-inch form factor and SATA III interface. Some picks offer larger storage capacities like 512GB, while others focus on specific use cases such as NAS systems or budget upgrades. Each drive provides standard SATA speeds suitable for everyday computing tasks. You can select a model based on your preferred brand, cache configuration, or total terabytes written rating. This list helps you find a drive that fits your exact technical requirements without compromising on compatibility.
How these alternatives compare
PNY CS900 500GB 2.5-Inch SATA SSD
The PNY CS900 shares the same 2.5-inch form factor and SATA III interface as the SK Hynix Gold S31. It also offers 500GB of storage capacity. However, the CS900 lacks dedicated DRAM cache, relying instead on SLC caching for performance management. This means sustained write speeds may drop faster than on the S31 during large file transfers. The PNY drive is lighter at 1.9 ounces. You should choose this alternative if you prioritize basic compatibility and lower cost over the enhanced endurance and cache structure found in the SK Hynix model.
Samsung 860 EVO 500GB SATA SSD
The Samsung 860 EVO matches the SK Hynix Gold S31 in form factor, interface, and capacity. It uses 3D NAND flash memory, similar to many modern SATA drives. The Samsung model is slightly thinner and lighter than the S31. It is known for strong data protection features and a robust warranty. Unlike the S31 which uses HYPERWRITE cache, the Samsung relies on its own controller optimization. Pick this drive if you want a well-established brand reputation and strong security protocols for your daily desktop or laptop upgrade.
Addlink S20 512GB 2.5-Inch SATA SSD
The Addlink S20 offers 512GB of storage, which is larger than the 500GB S31. It uses SLC caching instead of the dedicated DRAM found in the SK Hynix drive. This caching method can provide good sustained write speeds, making it suitable for PS4 upgrades or tasks with consistent data writing. The drive is 2.5-inch SATA III compatible. If you need a bit more capacity and do not require DRAM for heavy multitasking, the Addlink S20 is a practical choice for systems where write endurance matters more than random read performance.
Lexar NS100 512GB 2.5-Inch SATA SSD
The Lexar NS100 provides 512GB of storage in the same 2.5-inch SATA III format. It is significantly lighter at 1.2 ounces compared to the 1.85-ounce S31. The NS100 is a DRAM-less design, using host memory buffer technology for performance. This makes it less ideal for heavy workloads but sufficient for basic computing tasks. If you are upgrading an older laptop or desktop and need slightly more capacity with a lighter drive, the Lexar NS100 offers a straightforward solution without the complexity of dedicated cache memory.
Western Digital WD Red SA500 500GB NAS SSD
The Western Digital WD Red SA500 is designed specifically for NAS systems. It shares the 2.5-inch form factor and SATA III interface with the S31. It offers 500GB of storage using 3D NAND. The WD Red focuses on endurance for 24/7 operation in network environments. It lacks the specific HYPERWRITE cache technology of the SK Hynix drive. Choose this alternative if you are building or upgrading a NAS where reliability under constant load is critical, rather than needing the highest burst speeds typical of desktop SATA SSDs.
Inland Pro 120GB 2.5-Inch SATA SSD 3-Pack
The Inland Pro comes as a 3-pack of 120GB drives, totaling 360GB of storage. This is less capacity than the single 500GB S31. Each drive uses 3D NAND and SATA III. The total weight is 7.68 ounces for the pack. This option is for users who need multiple small drives for basic storage expansion rather than one large high-performance drive. It fits the same 2.5-inch bays. Pick this if you need volume over capacity and are building a system that requires several separate storage units for different functions or backups.
Quick picks
Our 7 picks
SK Hynix Gold S31 500GB SATA SSD
Best for: reliable SATA upgrades for desktops and laptops
- Storage Capacity
- 500GB
- Interface
- SATA Gen3
- Form Factor
- 2.5 inch
- Max Read Speed
- Up to 560MB/s
- Max Write Speed
- Up to 525MB/s
- Cache Type
- HYPERWRITE, DRAM
View on Amazon: SK Hynix Gold S31 500GB SATA SSD Affiliate link
The SK Hynix Gold S31 is a 500GB 2.5-inch SATA drive built for reliable daily use. It delivers sequential read speeds up to 560MB/s and write speeds up to 525MB/s. The drive includes dedicated DRAM and HYPERWRITE cache to help maintain performance. It offers a 5-year warranty and 600 TBW endurance. This model suits you if you want a stable upgrade for older systems or Macs using cloning software.
Pros
- Sequential read speeds up to 560MB/s
- Includes DRAM and HYPERWRITE cache
- 600 TBW endurance rating
- 5-year warranty coverage
Cons
- SATA interface limits speeds compared to NVMe
- Larger 2.5-inch form factor takes more space
- No mention of hardware encryption support
Good fit if
- You need a reliable drive for general computing
- You are upgrading a desktop or laptop with a 2.5-inch bay
- You want a drive with dedicated DRAM for stability
Skip if
- You require NVMe speeds for heavy workloads
- You are building a compact ITX system with limited drive bays
- You need hardware encryption for sensitive data
Verdict: SK Hynix Gold S31 500GB SATA SSD provides consistent performance and strong endurance for users upgrading standard SATA bays. It is the right choice for those prioritizing stability and warranty length over raw speed.
PNY CS900 500GB 2.5-Inch SATA SSD
Best for: Budget SATA upgrades for standard PCs
- Storage Capacity
- 500GB
- Interface
- SATA III
- Form Factor
- 2.5"
- Max Read Speed
- 550MB/s
- Max Write Speed
- 500MB/s
- Compatibility
- Laptop
View on Amazon: PNY CS900 500GB 2.5-Inch SATA SSD Affiliate link
The PNY CS900 is a 2.5-inch SATA III SSD designed for laptops and desktops. It offers sequential read speeds up to 550MB/s and write speeds up to 500MB/s. This drive supports backward compatibility with SATA II interfaces. It features ultra-low power consumption. You get reliable storage in a compact form factor. It suits users seeking standard SATA performance without extra features.
Pros
- Sequential read speeds up to 550MB/s
- Sequential write speeds up to 500MB/s
- Backward compatible with SATA II 3GB/sec
- Ultra-low power consumption
Cons
- No DRAM cache mentioned in specifications
- Endurance rating not listed in data
- No hardware encryption support noted
Good fit if
- You need a budget-friendly SATA upgrade
- You are upgrading an older SATA II system
- You want a standard 2.5-inch drive for a laptop
Skip if
- You require NVMe Gen3 or Gen4 speeds
- You need NAS-optimized endurance features
- You want enterprise-grade reliability ratings
Verdict: PNY CS900 500GB SATA SSD delivers standard SATA III performance for everyday computing tasks. It fits users upgrading older systems or needing affordable storage for basic workloads.
Samsung 860 EVO 500GB SATA SSD
Best for: Standard desktop and laptop upgrades
- Storage Capacity
- 500GB
- Interface
- SATA III
- Form Factor
- 2.5 Inch
- Max Read Speed
- 550MB/s
- Max Write Speed
- 520MB/s
- Dimensions
- 3.94 × 2.76 × 0.27 inches
View on Amazon: Samsung 860 EVO 500GB SATA SSD Affiliate link
The Samsung 860 EVO 500GB is a 2.5-inch SATA III drive built with V-NAND technology. It delivers sequential read speeds up to 550MB/s and write speeds up to 520MB/s. This model includes AES 256-bit hardware encryption and a 5-year limited warranty. It fits standard desktops and laptops. You get reliable performance for everyday computing and media tasks without needing a high-end interface.
Pros
- Sequential read speeds up to 550MB/s
- Sequential write speeds up to 520MB/s
- AES 256-bit hardware encryption
- 5-year limited warranty
- V-NAND technology for optimized performance
Cons
- SATA III interface limits speed compared to NVMe drives
- No included mounting screws or brackets
- No mobile app for management
Good fit if
- You need reliable SATA performance for a standard PC
- You want hardware encryption for data security
- You prefer a drive with a 5-year warranty
Skip if
- You require NVMe speeds for heavy workloads
- You are building a compact mini-PC with limited space
- You need included installation hardware
Verdict: Samsung 860 EVO 500GB SATA SSD offers solid SATA speeds and strong security for users upgrading older systems or needing dependable daily performance. It suits those prioritizing warranty length and data protection over raw speed.
Addlink S20 512GB 2.5-Inch SATA SSD
Best for: PS4 upgrades and sustained write tasks
- Storage Capacity
- 512GB
- Interface
- SATA III
- Form Factor
- 2.5 inch
- Max Read Speed
- 500MB/s
- Max Write Speed
- 450MB/s
- Cache Type
- SLC Caching
View on Amazon: Addlink S20 512GB 2.5-Inch SATA SSD Affiliate link
The Addlink S20 is a 2.5-inch SATA III drive with 512GB of 3D NAND storage. It reaches 500MB/s read and 450MB/s write speeds. It uses SLC caching to maintain speed during large transfers without dedicated DRAM. This slim design fits standard bays and PS4 consoles. You get reliable performance for everyday computing tasks.
Pros
- 512GB storage capacity
- 500MB/s read speed
- 450MB/s write speed
- SLC caching technology
- 2.5-inch 7mm form factor
Cons
- No dedicated DRAM cache
- 512GB is smaller than some competitors
- 3-year warranty is shorter than industry standard
Good fit if
- You need a direct PS4 upgrade
- You want SLC caching for sustained writes
- You prefer 3D NAND durability
Skip if
- You require dedicated DRAM for heavy workloads
- You need more than 512GB in one drive
- You want the longest possible warranty
Verdict: Addlink S20 512GB SATA SSD offers solid SATA speeds and SLC caching for users upgrading from HDDs or installing in PS4 consoles. It suits those prioritizing sustained write performance over dedicated DRAM.
Lexar NS100 512GB 2.5-Inch SATA SSD
Best for: Basic storage upgrades for older laptops and desktops
- Storage Capacity
- 512GB
- Interface
- SATA III
- Form Factor
- 2.5"
- Max Read Speed
- 550MB/s
- Compatibility
- Laptop
- Dimensions
- 3.94 × 2.75 × 0.28 inches
View on Amazon: Lexar NS100 512GB 2.5-Inch SATA SSD Affiliate link
The Lexar NS100 is a 2.5-inch SATA III drive offering 512GB of storage. It delivers sequential read speeds up to 550MB/s, which helps with faster application loads and data transfers. This model weighs just 1.2 ounces and measures 0.28 inches thick. It is built for users who need reliable, shock-resistant storage in a standard form factor without moving parts.
Pros
- 512GB storage capacity
- SATA III interface
- Up to 550MB/s read speed
- Shock and vibration resistant
Cons
- Only sequential read speed listed; write speed is unspecified
- No DRAM cache mentioned in specifications
- 240TBW endurance rating is modest for the capacity
Good fit if
- You need a drop-in replacement for a 2.5-inch drive bay
- You want 512GB of reliable storage for everyday tasks
- You prioritize standard SATA compatibility over NVMe speeds
Skip if
- You require high sustained write performance for large files
- You need NVMe speeds for professional workloads
- You are building a drive that needs heavy endurance ratings
Verdict: Lexar NS100 512GB SATA SSD provides standard SATA III performance for general computing. It fits users upgrading older systems who need basic capacity and speed without complex features.
Western Digital WD Red SA500 500GB NAS SSD
Best for: NAS systems needing endurance
- Storage Capacity
- 500GB
- Interface
- SATA III 6 Gb/s
- Form Factor
- 2.5"/7mm
- Max Read Speed
- Up to 560 MB/s
- Compatibility
- NAS
- NAND Type
- 3D NAND
View on Amazon: Western Digital WD Red SA500 500GB NAS SSD Affiliate link
The WD Red SA500 is a 500GB SATA III drive built for NAS environments. It uses 3D NAND and reaches up to 560 MB/s read speeds. Its 2.5-inch form factor fits standard bays. This drive targets users needing high endurance for 24/7 operation. It handles heavy read and write loads better than standard desktop drives.
Pros
- 500GB storage capacity
- SATA III 6 Gb/s interface
- Up to 560 MB/s max read speed
- 3D NAND technology
- Optimized for NAS reliability
Cons
- Higher price than standard desktop SSDs
- NAS-specific tuning limits general PC use
- No DRAM cache listed
Good fit if
- You need a drive for a NAS system
- You require high endurance for 24/7 operation
- You want SATA III compatibility
Skip if
- You need NVMe speeds
- You are building a standard desktop PC
- You want the lowest cost option
Verdict: WD Red SA500 500GB NAS SSD suits NAS users needing endurance. It offers SATA III performance for heavy loads.
Inland Pro 120GB 2.5-Inch SATA SSD 3-Pack
Best for: budget multi-drive storage upgrades
- Storage Capacity
- 120GB
- Interface
- SATA III 6Gb/s
- Form Factor
- 2.5"
- Max Read Speed
- Up to 520 MB/s
- Max Write Speed
- Up to 410 MB/s
- Compatibility
- Laptop, Desktop
View on Amazon: Inland Pro 120GB 2.5-Inch SATA SSD 3-Pack Affiliate link
This INLAND Pro drive offers 120GB of storage in a standard 2.5-inch form factor. It uses SATA III 6Gb/s and 3D TLC NAND flash. Sequential read speeds reach 520MB/s, while writes hit 410MB/s. You get a three-pack configuration, which lowers the per-drive cost. It is suitable for basic system upgrades or secondary storage where high capacity is not the priority.
Pros
- Sequential read speeds up to 520MB/s
- Includes three 120GB drives in one package
- Uses 3D TLC NAND flash for durability
- Standard 2.5-inch form factor fits most systems
Cons
- 120GB capacity is significantly lower than the 500GB alternatives
- Sequential write speed of 410MB/s is slower than competitors
- No SLC caching mentioned for sustained performance
Good fit if
- You need multiple low-capacity drives for bulk storage
- You are upgrading older systems with limited budget
- You require standard 2.5-inch SATA compatibility
Skip if
- You need high capacity for large media libraries
- You require fast sequential write speeds for heavy transfers
- You want a single high-capacity drive
Verdict: INLAND Pro 120GB 3-Pack SATA SSD provides a cost-effective way to add storage volume rather than speed. It fits users who need several small drives for basic computing tasks rather than high-performance single drives.
Specifications side by side
| Spec | SK Hynix Gold S31 500GB SATA SSD | PNY CS900 500GB 2.5-Inch SATA SSD | Samsung 860 EVO 500GB SATA SSD | Addlink S20 512GB 2.5-Inch SATA SSD | Lexar NS100 512GB 2.5-Inch SATA SSD | Western Digital WD Red SA500 500GB NAS SSD | Inland Pro 120GB 2.5-Inch SATA SSD 3-Pack |
|---|---|---|---|---|---|---|---|
| Storage Capacity | 500GB | 500GB | 500GB | 512GB | 512GB | 500GB | 120GB |
| Interface | SATA Gen3 | SATA III | SATA III | SATA III | SATA III | SATA III 6 Gb/s | SATA III 6Gb/s |
| Form Factor | 2.5 inch | 2.5" | 2.5 Inch | 2.5 inch | 2.5" | 2.5"/7mm | 2.5" |
| Max Read Speed | Up to 560MB/s | 550MB/s | 550MB/s | 500MB/s | 550MB/s | Up to 560 MB/s | Up to 520 MB/s |
| Max Write Speed | Up to 525MB/s | 500MB/s | 520MB/s | 450MB/s | not specified | not specified | Up to 410 MB/s |
| Cache Type | HYPERWRITE, DRAM | not specified | not specified | SLC Caching | not specified | not specified | not specified |
| Compatibility | not specified | Laptop | not specified | not specified | Laptop | NAS | Laptop, Desktop |
| NAND Type | not specified | not specified | not specified | 3D NAND | not specified | 3D NAND | 3D NAND, TLC |
| Size | 500GB | 500GB | 500GB | 512GB | 512GB | 500GB | 120GB x 3 |
| Dimensions | 3.94 × 2.75 × 0.28 inches | 3.94 × 2.75 × 0.28 inches | 3.94 × 2.76 × 0.27 inches | 3.94 × 2.75 × 0.28 inches | 3.94 × 2.75 × 0.28 inches | 3.95 × 2.75 × 0.28 inches | 2.75 × 3.94 × 0.28 inches |
| Weight | 1.85 ounces | 1.9 ounces | 1.76 ounces | not specified | 1.2 ounces | not specified | 7.68 ounces |
| Color | Gold | Black | Black | S20 | Gray | Red | 120GB x 3 |
| Model | SHGS31-500GS-2 | SSD7CS900-500-RB | MZ-76E500B/AM | ad512GBS20S3S | LNS100-512AMZN | WDS500G1R0A | ce815f14-7400-4942-999b-0b41e3acff40 |
Frequently asked questions
Does the PNY CS900 have DRAM cache like the SK Hynix Gold S31?
No, the PNY CS900 lacks dedicated DRAM cache. It relies on SLC caching to manage performance. This design choice helps keep costs down while still delivering standard SATA III speeds for everyday computing tasks and older system upgrades.
Which alternative is best for PS4 upgrades?
The Addlink S20 is ideal for PlayStation 4 consoles. It features SLC caching for sustained write performance, which helps when loading large game files. Its 512GB capacity also provides more storage space than the 500GB SK Hynix option.
Is there a SATA SSD option for NAS systems?
Yes, the Western Digital WD Red SA500 is designed for NAS environments. It uses 3D NAND and offers SATA III performance built for heavy, continuous loads. This makes it a suitable endurance-focused alternative for network-attached storage setups.
Can I get a multi-drive pack instead of a single 500GB drive?
The INLAND Pro 120GB 3-Pack offers three small drives. This option is best if you need to add storage volume to multiple systems rather than upgrading a single machine. It provides basic SATA III performance for general computing tasks.
What is the size of the Samsung 860 EVO compared to the SK Hynix Gold S31?
Both drives use the standard 2.5-inch form factor. The Samsung 860 EVO measures 2.76 inches in width and 0.27 inches in height. The SK Hynix Gold S31 is slightly wider at 2.75 inches and 0.28 inches thick. Both fit standard drive bays.
Does the Lexar NS100 offer advanced caching features?
The Lexar NS100 provides standard SATA III performance without complex caching features. It is designed for basic storage upgrades in older laptops and desktops. This makes it a simple, straightforward alternative if you do not need specialized cache types.