Kingston A400
Score: 71/100
Samsung 990 PRO
Score: 81/100Rankings
The Samsung 990 PRO 1TB is a high-performance PCIe 4.0 NVMe SSD delivering up to 7,450 MB/s read and 6,900 MB/s write speeds with strong security features. Its heatsink-less design and limited pSLC cache can limit sustained heavy workloads. Best suited for gamers, content creators, and professionals who need maximum PCIe 4 throughput on desktops or laptops with adequate cooling.
The Kingston A400 240 GB SSD is a budget-friendly 2.5-inch SATA drive offering up to 500 MB/s read speed and very low power draw. Its write speed caps at 350 MB/s and endurance is limited to 80 TB TBW. Ideal for users upgrading older laptops or desktops who need a cost-effective OS drive.
| Attribute | | |
|---|---|---|
240 GB | 1,024 GBbest | |
500 MB/s | 7,450 MB/sbest | |
350 MB/s | 6,900 MB/sbest | |
— | 1,200,000 IOPSbest | |
— | 1,550,000 IOPSbest | |
80 TB | 600 TBbest | |
— | 1,500,000 hoursbest | |
— | 1,024 MBbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Connectivity(1) | ||
Interface | SATA III | PCIe 4.0 x4 |
Performance(2) | ||
Sequential Read Speed (MB/s) | 500 MB/s | 7450 MB/s |
Sequential Write Speed (MB/s) | 350 MB/s | 6900 MB/s |
Storage(1) | ||
Storage Capacity (GB) | 240 GB | 1024 GB |
General(1) | ||
Warranty (years) | 3 years | 5 years |
Reliability(2) | ||
Total Bytes Written (Endurance) (TB) | 80 TB | 600 TB |
Mean Time Between Failures (hours) | 1000000-2000000 hours | 1500000 hours |
Power & Reliability(1) | ||
Idle Power Consumption (W) | 0.195 W | 0.05 W |
Design & Build(3) | ||
Form Factor | 2.5 inch | M.2 2280 |
Weight (g) | 41 g | 9.1 g |
Dimensions (L×W×H) (mm) | 7.1 x 69.9 x 100.1 mm mm | 80.3×22.1×2.3 mm mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers and editors praise the Kingston A400 240GB for its impressive speed uplift over mechanical drives, rugged build quality, and excellent value at a low price. However, they caution that its write speed ceiling, modest 80 TB TBW endurance, and inconsistent MTBF figures make it less suitable for heavy-write or enterprise scenarios.
Everyday users overwhelmingly appreciate the noticeable boost in boot times, quieter operation, and straightforward installation, often describing the drive as feeling truly ten times faster than their old HDDs.
Professional reviewers commend the 990 PRO for its exceptional speed, gaming-optimized random performance, and strong reliability, while noting the smaller DRAM cache and lack of a heatsink as potential drawbacks under heavy sustained loads.
Everyday users praise the drive's blazing speed and security, but note concerns about the smaller DRAM cache and possible throttling without a heatsink.
