Best 400GB DRAM SSDs
There are 5 400GB DRAM 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 515–3100 MB/s at 400GB.
Why this configuration
A 400GB DRAM SSD is the consistency-first shortlist. An onboard DRAM cache holds the flash mapping table on the drive itself, so random performance stays steady when the workload keeps going rather than tailing off.
Usually chosen for: workstations, virtual machines and anything that writes continuously.
Good fit: workstation and creative loads that hammer random I/O.
Ranked list
Speeds on this page are the manufacturer's 400GB ratings where published (5 of 5 drives), not the family headline figure. 2 of the 5 are rated slower at 400GB than at their fastest capacity. Rated writes at 400GB run 465–1600 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 |  OCZ INTREPID 3600 100GB, 200GB, 400GB, 800GB | High-end | INDILINX IDX400M00-BC | 515 | 1498 | Find on Amazon |
| 3 |  Synology SNV3400 400GB | Mid-range | Phison PS5012-E12DC | 3100 | 500 | Find on Amazon |
| 4 |  Synology SNV3500 400GB | Mid-range | Phison PS5012-E12DC | 3100 | 500 | Find on Amazon |
| 5 |  Corsair NEUTRON NX500 400GB, 800GB, 1.6TB | Mid-range | Phison PS5007-E7 | 2800 | 2793 | Find on Amazon |
The parts, explained
An onboard DRAM cache keeps the flash mapping table on the drive, holding random performance steady under sustained load.