Silicon Power XS70 1TB -- Phison E18 PCIe 4.0 Gaming NVMe Review (2026)
The Silicon Power XS70 1 TB is a Phison E18-powered PCIe 4.0 gaming SSD with DDR4 DRAM cache, delivering strong Gen4 reads at a competitive price point.
Controller & Memory
The XS70 uses the Phison PS5018-E18 controller with 3D TLC NAND and 1 GB of DDR4 DRAM cache. At 1 TB it is rated at 7,000 MB/s reads and 5,500 MB/s writes. Endurance is 700 TBW, backed by a five-year warranty. The single-sided PCB fits thin laptops.
The E18 platform is battle-tested across dozens of drives. The XS70 is Silicon Power's gaming-branded flagship, competing with the Kingston KC3000 and Corsair MP600 Pro. The 1 TB write speed is below the 2 TB variant's 6,800 MB/s — a capacity-specific trade-off. For gamers and content creators, the XS70 delivers strong Gen4 performance with the DRAM advantage.
Storage Comparisons:
XS70 Performance & Benchmarks
The 1 TB XS70 delivers 7,000/5,500 MB/s sequential reads and writes with DRAM-equipped random I/O performance. The E18 pseudo-SLC cache handles burst writes efficiently. Gaming load times are competitive with any PCIe 4.0 flagship. Under sustained writes, the 5,500 MB/s ceiling is adequate but below the 2 TB's 6,800 MB/s.
Silicon Power XS70 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
- Silicon Power XS70 1 TB (this drive): 7,000 MB/s read, 5,500 MB/s write
Silicon Power XS70 vs Competitors
See how the XS70 stacks up against other M.2 4.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
Silicon Power covers the XS70 1 TB with a five-year warranty limited by 700 TBW, equivalent to roughly 384 GB/day over five years. The 2 TB model carries 1,400 TBW.
Silicon Power XS70 1 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 1 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5018-E18 |
| Memory type [?] | Micron 3D TLC |
| DRAM [?] | Samsung DDR4 |
| Read speed (MB/s) [?] | 7000 |
| Write speed (MB/s) [?] | 5500 |
| Read IOPS [?] | 1000000 |
| Write IOPS [?] | 1000000 |
| Endurance (TBW) [?] | 700 |
| MTBF (million hours) [?] | 2000000 |
| Warranty (years) [?] | 5 |
Verdict: Is the XS70 Worth It in 2026?
The 1 TB XS70 is Silicon Power's strongest consumer SSD — a Phison E18 drive with DRAM at a price that undercuts most E18 competitors. The 7,000/5,500 MB/s speeds are competitive, and the 700 TBW endurance is adequate. For buyers who want E18 performance without paying Samsung or Corsair premiums, the XS70 is a solid choice. Compare pricing against the Kingston KC3000 1 TB and ADATA XPG Gammix S70 Blade 1 TB.
+ Pros
- 7,000/5,500 MB/s -- strong Gen4 reads
- Phison E18 with DDR4 DRAM cache
- 700 TBW endurance with 5-year warranty
- Single-sided PCB -- fits thin laptops
- Competitive E18 pricing
- Cons
- 5,500 MB/s writes -- below 2TB variant
- Silicon Power brand less recognized globally
- No factory heatsink option
Buy this or similar SSD Storage:
Video Review
Silicon Power XS70 SSD Review, PC Benchmarks & PS5 Testing
