# 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.

Quick answer: 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.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5018-E18 |
| Memory type | Micron 3D TLC |
| DRAM cache | Samsung DDR4 |
| Sequential read | 7000 MB/s |
| Sequential write | 5500 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 1000000 |
| Endurance | 700 TBW |
| MTBF | 2000000 |
| Warranty | 5 years |

## Performance

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.

## 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.

## Pros and Cons

**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


## Verdict

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.

## Frequently Asked Questions

### Is the XS70 1TB good for PS5?

Yes — 7,000 MB/s reads exceed the 5,500 MB/s minimum. Add a compatible heatsink since the drive ships bare.

### Does it have DRAM?

Yes — the XS70 includes 1 GB of DDR4 DRAM cache, providing better random I/O performance than DRAM-less designs.

### What is the TBW of the 1TB XS70?

Rated for 700 TBW over five years. The 2 TB carries 1,400 TBW.

### How does it compare to the Kingston KC3000 1TB?

The KC3000 rates at 7,000/7,000 MB/s — matching reads but leading on writes. Endurance is 800 vs 700 TBW. The KC3000 is slightly stronger but often more expensive.

### Why is the 1TB write speed lower than the 2TB?

The Phison E18 has eight NAND channels. The 1 TB model populates fewer dies per channel, reducing write parallelism. The 2 TB delivers 6,800 MB/s writes.

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Last updated: 2026-05-23. Source: https://ssdrive.net/silicon-power-xs70-1-tb