WD_BLACK SN770
Score: 80/100
Fanxiang S101
Score: 62/100Rankings
The WD_BLACK SN770 2TB is a DRAM-less PCIe Gen4 SSD delivering up to 5150 MB/s reads and 4850 MB/s writes with a robust 1200 TBW endurance. Its budget-friendly price and low power draw come at the cost of no onboard DRAM and no included heatsink, which can limit sustained performance under heavy loads. Ideal for gamers and mainstream builders seeking fast sequential performance without the premium price.
The Fanxiang S101 1TB SATA SSD offers an affordable upgrade path for older laptops and desktops, delivering up to 550 MB/s read speeds with reliable TLC NAND. Its limitations include the SATA III bandwidth ceiling and lack of advanced features such as DRAM cache or hardware encryption. It is best suited for budget-conscious users needing a simple storage boost on legacy systems.
| Attribute | | |
|---|---|---|
2,000 GBbest | 1,000 GB | |
5,150 MB/sbest | 550 MB/s | |
4,850 MB/sbest | — | |
650,000 IOPSbest | — | |
800,000 IOPSbest | — | |
1,200 TBbest | — | |
0 MBbest | — | |
5 yearsbest | 5 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Connectivity(1) | ||
Interface | PCIe Gen4 x4 NVMe 1.4 | SATA III |
Performance(2) | ||
Sequential Read Speed (MB/s) | 5150 MB/s | 550 MB/s |
Sequential Write Speed (MB/s) | 4850 MB/s | 470-520 MB/s |
Storage(1) | ||
Storage Capacity (GB) | 2000 GB | 1000 GB |
Design & Build(3) | ||
Form Factor | M.2 2280 | 2.5" |
Weight (g) | 5.5 g | 45.4 g |
Dimensions (L×W×H) (mm) | 80x22x2.4 mm mm | 100×69×7 mm mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers regard the WD_BLACK SN770 as a compelling budget-friendly PCIe Gen4 SSD that punches above its weight class, delivering flagship-like sequential speeds and solid endurance while keeping costs low. They commend its value, fast load times, and low power draw, but warn that the DRAM-less design and lack of a heatsink could limit sustained performance in demanding scenarios.
General users praise the drive for its rapid game loading, smooth everyday performance, and easy installation, seeing it as a solid value for a 2 TB capacity. Recurring concerns revolve around thermal throttling without a heatsink and occasional slowdowns during long write operations, especially for those expecting flagship-level consistency.
Professional reviewers consider the S101 a solid, low-cost option for users who need a simple SATA upgrade. While it delivers the expected speed gains over HDDs, its SATA III bandwidth and lack of premium features make it unsuitable for performance-critical workloads, and external use via USB shows markedly lower speeds.
“Fast game loading and smooth performance in PCs/PlayStation 5”
