Fanxiang S660 1TB SSD tech review (2026)
Fanxiang's S660 NVMe SSD works on PCIe M.2 4.0 x 4. Detailed characteristics of this SSD on our page.
Controller & Memory
Fanxiang's 1TB S660 NVMe SSD is powered by Phison PS5021-E21T 4 Channel. This storage has DRAM No to keep a map of where data is located on the drive. The S660 comes equipped with Micron 176-L QLC memory. This drive is offered also in 3 capacities: 512 GB, 4 TB and 2 TB volume sizes.
Storage Comparisons:
S660 Performance & Benchmarks
Internal SSD use PCIe M.2 4.0 x 4 expansion standard with sequential write speeds 4500 Mbps, and read speeds 5000 MB/s. S660 has IOPS 5000000 on reading and 4500000 on writing operations.
Fanxiang S660 1 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 1 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 Total Bytes Written. The S660 has 1500000 million hours mean time between failure.
Fanxiang S660 1 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 1 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?
Fanxiang S660 1TB use PCIe 4 that is twice faster than PCIe 3. The maximum write speed is 4500 Mb/s, that is common for this expansion standard. The NVMe has endurance 60 TBW, that is poor in comparison with closest competitors. After evaluating all the facts, our editor strongly advise to buy Fanxiang S660 1TB for your PC.
+ Pros
- Good writing speed
- PCIe 4.0
- Capacity
- Cons
- Writing speed
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Video Review
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