Silicon Power US70 4TB PCIe 4.0 NVMe SSD Specifications (2026)
Silicon Power US70 4TB pairs a Phison E16 controller with 3D TLC NAND and DDR4 DRAM cache for PCIe Gen4 reads of 5,000 MB/s and writes of 4,400 MB/s.
Controller & Memory
The Silicon Power US70 4TB is a high-capacity PCIe 4.0 x4 NVMe SSD built on the Phison PS5016-E16 controller platform with 3D TLC NAND flash memory. Sequential read speeds reach 5,000 MB/s with writes up to 4,400 MB/s, positioning it in the mid-tier of Gen4 performance.
The Phison E16 was the first consumer PCIe Gen4 controller, appearing in the initial wave of Gen4 SSDs from multiple manufacturers. While later controllers pushed speeds higher, the E16 remains a proven and capable mid-range Gen4 platform with strong reliability track records.
The US70 4TB includes a dedicated DDR4 DRAM cache for efficient NAND mapping table management. This provides sustained random 4K performance advantages over DRAMless HMB designs, particularly under mixed read-write workloads common in multitasking environments.
Silicon Power offers the US70 as a bare PCB drive without an included heatsink, keeping costs competitive. The 4TB capacity makes this drive ideal for users who need maximum storage for large game libraries, video project archives, and data-intensive applications. Silicon Power is a Taiwan-based storage manufacturer known for producing reliable drives at competitive price points. The US70 lineup spans multiple capacity options, with the 4TB variant representing the flagship capacity tier for users who need maximum onboard storage.
Storage Comparisons:
US70 Performance & Benchmarks
The 4TB US70 delivers 5,000 MB/s sequential read and 4,400 MB/s write throughput over PCIe 4.0 x4. While these speeds fall below the 7,400 MB/s Gen4 ceiling of later controllers, they provide a substantial improvement over SATA SSDs and more than adequate bandwidth for most consumer and professional workloads.
Silicon Power US70 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
- Silicon Power US70 4 TB (this drive): 5,000 MB/s read, 4,400 MB/s write
The dedicated DDR4 DRAM cache ensures strong sustained random performance compared to DRAMless alternatives. Under desktop use this translates to responsive system boot times, quick application launches, and smooth multitasking even with the large 4TB capacity managing extensive file systems.
Under sustained heavy writes the dynamic SLC cache eventually exhausts and write speeds drop to the native TLC pace. The 4TB capacity with its larger NAND array provides a generous SLC cache pool, allowing significantly longer sustained write bursts before exhausting compared to lower-capacity drives.
The Phison E16 controller generates moderate to high heat under sustained load. The US70 ships without an included heatsink, so users should plan to use their motherboard M.2 cooling armor or purchase an aftermarket heatsink to prevent thermal throttling during extended file transfers. Content creators working with large video project files will particularly benefit from the 4TB capacity combined with Gen4 bandwidth, enabling smooth timeline scrubbing and faster render export operations compared to slower SATA or PCIe 3.0 alternatives.
Silicon Power US70 vs Competitors
See how the US70 stacks up against other M.2 4.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
Silicon Power provides a five-year limited warranty on the US70 4TB from the date of original purchase. The endurance rating for the 4TB model stands at 3,600 TBW, meaning Silicon Power guarantees the drive can handle at least 3,600 terabytes of total data written before the warranty expires, whichever limit is reached first. This works out to approximately 1,973 GB of writes per day sustained over five years of continuous use, far exceeding typical consumer workloads. Silicon Power global support network handles warranty claims through authorized retailers and regional service centers. The five-year warranty and 3,600 TBW endurance reflect confidence in the proven Phison E16 controller platform and 3D TLC NAND flash durability under demanding consumer operating conditions.
Silicon Power US70 4 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 4 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5016-E16 |
| Memory type [?] | 3D TLC |
| DRAM [?] | DDR4 |
| Read speed (MB/s) [?] | 5000 |
| Write speed (MB/s) [?] | 4400 |
| Read IOPS [?] | 750000 |
| Write IOPS [?] | 750000 |
| Endurance (TBW) [?] | 3600 |
| MTBF (million hours) [?] | 2000000 |
| Warranty (years) [?] | 5 |
Verdict: Is the US70 Worth It in 2026?
The Silicon Power US70 4TB delivers reliable high-capacity PCIe 4.0 performance with the proven Phison PS5016-E16 controller, 3D TLC NAND, and dedicated DDR4 DRAM cache. At 5,000 MB/s read and 4,400 MB/s write, it offers solid Gen4 speeds with massive 4TB storage capacity.
The 3,600 TBW endurance rating and five-year warranty from Silicon Power provide excellent long-term confidence. Users should plan for adequate M.2 cooling since the drive ships without an included heatsink. If you need maximum Gen4 storage capacity for a desktop build, the US70 4TB is a compelling option worth considering.
+ Pros
- Phison E16 controller with proven PCIe Gen4 reliability
- 3D TLC NAND for consistent endurance characteristics
- DDR4 DRAM cache for sustained random performance
- 4TB capacity ideal for large game libraries and video archives
- Five-year warranty with exceptional 3,600 TBW endurance
- Cons
- No included heatsink requires motherboard cooling or aftermarket solution
- E16 controller runs warm under sustained workloads
- Speeds below the 7,400 MB/s Gen4 ceiling of newer controllers
- Older controller platform facing competition from modern alternatives
Buy this or similar SSD Storage:
Video Review
Silicon Power US70 PCIe 4 SSD Review - Still Worth It?
