Best 400GB PCIe 3.0 SSDs
There are 4 400GB PCIe 3.0 SSDs compared here. The fastest is the Synology SNV3400 at 3100 MB/s read at 400GB, and the highest-rated for endurance is the Corsair NEUTRON NX500 (2793 TBW). Sequential reads across the group span 2200–3100 MB/s at 400GB.
Why this configuration
A 400GB PCIe 3.0 SSD is an affordable NVMe step up from SATA. Gen3 is roughly six times SATA's throughput yet often costs little more, making it the easy default for a first NVMe drive or a laptop that only supports Gen3.
Usually chosen for: budget builders, laptop upgraders and anyone leaving SATA behind.
Good fit: mainstream desktop and laptop builds.
Ranked list
Speeds on this page are the manufacturer's 400GB ratings where published (4 of 4 drives), not the family headline figure. 2 of the 4 are rated slower at 400GB than at their fastest capacity. Rated writes at 400GB run 550–1600 MB/s.
| # | Model | Tier | Controller | Read MB/s (at 400GB) | TBW | |
|---|---|---|---|---|---|---|
| 1 |  Intel SSD 750 400GB, 800GB, 1.2TB | High-end | Intel CH29AE41AB0 | 2200 | 127.75 | Find on Amazon |
| 2 |  Synology SNV3400 400GB | Mid-range | Phison PS5012-E12DC | 3100 | 500 | Find on Amazon |
| 3 |  Synology SNV3500 400GB | Mid-range | Phison PS5012-E12DC | 3100 | 500 | Find on Amazon |
| 4 |  Corsair NEUTRON NX500 400GB, 800GB, 1.6TB | Mid-range | Phison PS5007-E7 | 2800 | 2793 | Find on Amazon |
The parts, explained
PCIe 3.0 x4 reaches about 3,500 MB/s — plenty for everyday use and gaming, and cheaper than Gen4.