Fanxiang S660 4TB NVMe SSD specs (2026)
Should you buy S660 (4TB) produced by Fanxiang and another characteristics read below on this site.
Controller & Memory
Fanxiang's 4TB S660 internal SSD is powered by Phison PS5021-E21T 4 Channel. This drive has DRAM No to keep a map of where data is located on the NVMe SSD. The S660 comes equipped with Micron 176-L QLC flash memory. NVMe SSD is offered also in 3 capacities: 1 TB, 2 TB and 512 GB volume sizes.
Storage Comparisons:
S660 Performance & Benchmarks
SSD use PCIe M.2 4.0 x 4 expansion standard with sequential read speeds 5000 Mbps, and maximum write speeds 4500 MB/s. It also has input/output performance 4500000 on writing and 5000000 on reading operations per second.
Fanxiang S660 4 TB vs M.2 4.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 4.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- Patriot Viper PV593 1 TB: 14,500 MB/s read, 14,000 MB/s write
- Patriot Viper PV593 2 TB: 14,500 MB/s read, 14,000 MB/s write
- Patriot Viper PV593 4 TB: 14,500 MB/s read, 14,000 MB/s write
- Patriot Viper PV573 2 TB: 14,000 MB/s read, 12,000 MB/s write
- Fanxiang S660 4 TB (this drive): 5,000 MB/s read, 4,500 MB/s write
Fanxiang S660 vs Competitors
See how the S660 stacks up against other M.2 4.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
Fanxiang provide 2 years warranty limited by 60 TBW. As well it has 1500000 million hours MTBF.
Fanxiang S660 4 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 4 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5021-E21T 4 Channel |
| Memory type [?] | Micron 176-L QLC |
| DRAM [?] | No |
| Read speed (MB/s) [?] | 5000 |
| Write speed (MB/s) [?] | 4500 |
| Read IOPS [?] | 5000000 |
| Write IOPS [?] | 4500000 |
| Endurance (TBW) [?] | 60 |
| MTBF (million hours) [?] | 1500000 |
| Warranty (years) [?] | 2 |
Verdict: Is the S660 Worth It in 2026?
S660 (4TB) produced by Fanxiang use PCIe 4 that is twice faster than PCIe 3.0. The maximum write speed is 4500 Mbps, that is common for this interface. The NVMe has endurance 60 TBW, that is not very much in comparison with rivals. After evaluating all the facts, our editor highly recommend to buy Fanxiang S660 4TB for your PC.
+ Pros
- Good writing speed
- PCIe 4.0
- Capacity
- Cons
- Writing speed
Buy this or similar SSD Storage:
Video Review
Fanxiang m.2 SSD - Worth it?
