KIOXIA vs SK Hynix: Nvme SSDs Compared by Specs
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This KIOXIA vs SK Hynix nvme SSD comparison highlights two distinct storage approaches. Both brands offer reliable internal drives for modern computing. The KIOXIA Exceria G3 uses PCIe 5.0 for high-speed data transfer. The SK Hynix Gold S31 relies on SATA Gen3 connectivity. One targets new gaming systems, while the other fits older PCs. You will see how interface and form factor dictate their best use cases.
Key differences
| Aspect | KIOXIA Exceria 1TB PCIe 5.0 SSD | SK Hynix Gold S31 500GB SATA SSD |
|---|---|---|
| Interface | PCIe 5.0 Gen5 x4 | SATA Gen3 |
| Form Factor | M.2 2280 | 2.5 inch |
| NAND Type | 3D QLC | 3D NAND |
| Cache Type | not listed | HYPERWRITE, DRAM |
| Max Read Speed | not listed | Up to 560MB/s |
Which one should you choose?
Choose KIOXIA Exceria 1TB PCIe 5.0 SSD if
- You need the fastest possible data transfer rates for gaming or large file transfers.
- Your motherboard supports PCIe 5.0 and has an available M.2 slot.
- You prefer a compact drive that takes up minimal space on your motherboard.
Choose SK Hynix Gold S31 500GB SATA SSD if
- You are upgrading an older desktop or laptop that only supports SATA connections.
- You want a drive with dedicated DRAM cache for consistent performance.
- You need a standard 2.5-inch form factor for easier installation in legacy cases.
Verdict: The KIOXIA Exceria G3 suits users with modern systems who need high-speed PCIe 5.0 performance. The SK Hynix Gold S31 is the better choice for older computers requiring SATA connectivity. Choose the interface that matches your motherboard's capabilities.
KIOXIA vs SK Hynix SSD Specs
Interface Speed
The KIOXIA Exceria G3 uses a PCIe 5.0 Gen5 x4 interface, designed for high-bandwidth data transfer. This modern standard supports significantly higher throughput than older connections. In contrast, the SK Hynix Gold S31 utilizes a SATA Gen3 interface. SATA is a mature, widely supported protocol but has a lower maximum bandwidth ceiling. For users prioritizing raw sequential transfer rates and next-generation connectivity, the PCIe 5.0 architecture offers a clear technical advantage over the SATA Gen3 limitation found in the SK Hynix drive.
Form Factor
Physical dimensions determine compatibility with your system. The KIOXIA Exceria G3 is an M.2 2280 drive, measuring 3.19 inches in length, 0.87 inches in width, and 0.09 inches in height. This compact stick form factor is standard for modern laptops and desktops with M.2 slots. The SK Hynix Gold S31 is a 2.5-inch drive, measuring 3.94 inches long, 2.75 inches wide, and 0.28 inches thick. The 2.5-inch form factor requires specific mounting brackets and SATA power connectors, making it bulkier but compatible with older systems lacking M.2 slots.
NAND Type
The underlying flash memory technology impacts density and performance characteristics. The KIOXIA Exceria G3 is built with advanced BiCS Flash 3D QLC NAND. This technology allows for higher storage density within a compact form factor, which is beneficial for larger capacities like 1TB or 2TB. The SK Hynix Gold S31 features in-house 3D NAND, paired with its own controller and DRAM. While both use 3D NAND architectures for improved reliability and density, the specific QLC designation on the KIOXIA model highlights its focus on high-capacity storage density.
Cache Technology
Cache memory improves performance during heavy workloads. The SK Hynix Gold S31 includes dedicated DRAM and proprietary HYPERWRITE cache technology. This hardware cache helps manage data efficiently, contributing to its consistent sequential write speeds of up to 525MB/s. The KIOXIA Exceria G3 specifications do not explicitly list DRAM cache in the provided data. While it offers high IOPS, the absence of specified DRAM in the data suggests a different performance profile. The presence of DRAM on the SK Hynix drive provides a tangible advantage for sustained data handling.
Reliability Metrics
Long-term durability is defined by specific endurance metrics. The SK Hynix Gold S31 provides detailed reliability data, including a 1.5 million hour MTBF (Mean Time Between Failures) and up to 600 TBW (TeraBytes Written). It is also validated through 1,000 hours of HTOL stress testing. The KIOXIA Exceria G3 data does not list MTBF or TBW figures. Without these specific endurance numbers in the provided specifications, the SK Hynix drive offers verifiable reliability benchmarks that help you assess its lifespan for write-heavy tasks.
Which drive fits your setup
PCIe 5.0 gamers seeking high speed
The KIOXIA Exceria G3 uses a PCIe 5.0 Gen5 x4 interface. This modern standard supports significantly higher throughput than older connections. It delivers up to 1,600,000 IOPS random read speeds. These metrics ensure fast load times and system responsiveness for demanding gaming libraries or large media projects.
Users needing reliable SATA storage
The SK Hynix Gold S31 relies on SATA Gen3 connectivity. It offers sequential read speeds up to 560MB/s. The drive includes DRAM cache and HYPERWRITE technology for stability. It features a 5-year warranty and high endurance ratings. This makes it a dependable choice for general computing and cloning tasks.
Budget-conscious buyers with limited space
The SK Hynix Gold S31 is available in a 500GB capacity. Its 2.5-inch form factor fits standard drive bays in many older systems. The SATA interface is widely compatible across various devices. This option provides solid performance for everyday tasks without requiring a motherboard with a PCIe 5.0 slot.
The products compared
KIOXIA Exceria 1TB PCIe 5.0 SSD
Best for: Gaming and media workflows on PCIe 5.0 systems
- Storage Capacity
- 1TB
- Interface
- PCIe 5.0 Gen5 x4
- Form Factor
- M.2 2280
- Compatibility
- Gaming
- Dimensions
- 5.91 × 5.91 × 7.87 inches
View on Amazon: KIOXIA Exceria 1TB PCIe 5.0 SSD Affiliate link
The KIOXIA Exceria G3 is a 1TB M.2 2280 NVMe drive using PCIe 5.0 Gen5 x4. It features BiCS Flash 3D QLC NAND for high density. Random read speeds reach 1,600,000 IOPS, while random writes hit 1,450,000 IOPS. This setup supports fast load times and system responsiveness. It fits gaming libraries and media projects. You get a compact form factor with modern interface speeds.
Pros
- PCIe 5.0 Gen5 x4 interface for high bandwidth
- 1,600,000 IOPS random read speed
- 1,450,000 IOPS random write speed
- BiCS Flash 3D QLC NAND for high density
Cons
- QLC NAND may have lower endurance than TLC
- Newer PCIe 5.0 may not be supported by all motherboards
- Limited capacity options compared to SATA drives
Good fit if
- You need fast load times for gaming
- You have a PCIe 5.0 compatible motherboard
- You want high random read and write speeds
Skip if
- You are using an older motherboard with only PCIe 3.0
- You need maximum endurance for heavy write workloads
- You prefer SATA drives for compatibility
Verdict: KIOXIA Exceria G3 1TB PCIe 5.0 delivers high-speed performance for gaming and media workflows on compatible systems. It suits users who prioritize fast load times and have the necessary hardware support.
SK Hynix Gold S31 500GB SATA SSD
Best for: SATA upgrades with DRAM cache
- 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 2.5-inch SATA drive offering sequential read speeds up to 560MB/s and write speeds up to 525MB/s. It uses in-house 3D NAND, a dedicated controller, and DRAM cache. This model provides a 500GB capacity and includes a 5-year warranty with 600 TBW endurance. It suits users needing reliable internal storage for desktops or laptops.
Pros
- Sequential read speeds up to 560MB/s
- Includes dedicated DRAM cache for performance
- 5-year warranty with 600 TBW endurance
- Uses in-house 3D NAND components
Cons
- Limited to SATA Gen3 interface speeds
- Only 500GB storage capacity available
- Heavier and bulkier than M.2 NVMe drives
Good fit if
- You need a reliable 2.5-inch SATA drive
- You want a drive with DRAM cache
- You prefer a 5-year warranty
Skip if
- You require PCIe Gen5 speeds
- You need more than 500GB storage
- You want a compact M.2 form factor
Verdict: SK Hynix Gold S31 500GB SATA SSD delivers consistent SATA speeds with DRAM support. It fits users upgrading older systems who value endurance and warranty coverage over raw bandwidth.
Specifications side by side
| Spec | KIOXIA Exceria 1TB PCIe 5.0 SSD | SK Hynix Gold S31 500GB SATA SSD |
|---|---|---|
| Storage Capacity | 1TB | 500GB |
| Interface | PCIe 5.0 Gen5 x4 | SATA Gen3 |
| Form Factor | M.2 2280 | 2.5 inch |
| Max Read Speed | not stated | Up to 560MB/s |
| Max Write Speed | not stated | Up to 525MB/s |
| Cache Type | not stated | HYPERWRITE, DRAM |
| Compatibility | Gaming | not stated |
| Size | 1 To | 500GB |
| Dimensions | 5.91 × 5.91 × 7.87 inches | 3.94 × 2.75 × 0.28 inches |
| Weight | not stated | 1.85 ounces |
| Model | EXCERIA G3 | SHGS31-500GS-2 |
| Color | not stated | Gold |
Frequently asked questions
Does the KIOXIA Exceria G3 support PCIe 5.0?
Yes, the KIOXIA Exceria G3 uses a PCIe 5.0 interface. This standard enables high-speed data transfer for compatible systems. It is designed for users who need fast load times for gaming and media workflows. You must have a motherboard that supports PCIe 5.0 to utilize its full potential.
Is the SK Hynix Gold S31 an NVMe drive?
No, the SK Hynix Gold S31 is a SATA SSD. It connects via the SATA III interface rather than the NVMe protocol. This makes it suitable for upgrading older systems that may not support newer PCIe standards. It offers consistent performance within the limits of SATA connectivity.
What form factor does the SK Hynix Gold S31 use?
The SK Hynix Gold S31 uses a 2.5-inch form factor. This is the standard size for traditional internal hard drives and older SSDs. It fits into standard drive bays in desktops and laptops. This contrasts with the M.2 stick form factor used by the KIOXIA Exceria G3.
Which drive is better for gaming on modern hardware?
The KIOXIA Exceria G3 is better for gaming on modern hardware. It is optimized for gaming and media workflows on PCIe 5.0 systems. The high-speed interface reduces load times significantly. The SK Hynix Gold S31 is a SATA drive, which lacks the bandwidth needed for the fastest modern gaming experiences.
Does the SK Hynix Gold S31 include DRAM cache?
Yes, the SK Hynix Gold S31 includes DRAM cache support. This feature helps manage data more efficiently, leading to consistent performance. It is particularly useful for users upgrading older systems who value endurance. The KIOXIA Exceria G3 focuses on raw PCIe 5.0 speed rather than DRAM caching.
What is the storage capacity of the KIOXIA Exceria G3?
The KIOXIA Exceria G3 is available in a 1TB capacity. This provides ample space for large games and media files. The SK Hynix Gold S31 is listed with a 500GB capacity. You should choose the drive that matches your specific storage requirements and budget constraints.
Can I use the KIOXIA Exceria G3 in an old laptop?
You likely cannot use the KIOXIA Exceria G3 in an old laptop. It requires a PCIe 5.0 interface, which is only found in very recent hardware. Older systems typically lack this support. The SK Hynix Gold S31 is a better fit for older laptops because it uses the widely compatible SATA III interface.