# Corsair Force MP400 4TB QLC NVMe SSD Review (2026)

The Corsair Force MP400 4 TB is the capacity-focused variant of Corsair's QLC lineup, switching to the Phison E12S controller to pack Micron 96-layer QLC into a double-sided M.2 2280 with 800 TBW endurance.

Quick answer: The Corsair Force MP400 4 TB targets users who need maximum NVMe capacity in a single M.2 slot and are willing to accept QLC trade-offs to get it. Content creators working with large media archives, gamers with extensive libraries, and NAS builders upgrading to all-NVMe storage will find the capacity compelling. Anyone doing frequent sustained writes of hundreds of gigabytes should consider TLC alternatives like the Samsung 980 Pro 2TB or WD Black SN850X, which maintain speed after their caches fill. The MP400 4 TB is a niche product that fills its niche well: maximum NVMe capacity at a lower cost per GB than TLC competitors.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 3.0 x 4 |
| Controller | Phison PS5012-E12S |
| Memory type | Micron 96L QLC |
| DRAM cache | DDR3L |
| Sequential read | 3480 MB/s |
| Sequential write | 3000 MB/s |
| Random read IOPS | 610000 |
| Random write IOPS | 710000 |
| Endurance | 800 TBW |
| MTBF | 1.8 |
| Warranty | 5 years |

## Performance

Corsair rates the Force MP400 4 TB at 3,480 MB/s sequential read and 3,000 MB/s sequential write. The Phison E12S controller pushes random performance to 610,000 read IOPS and 710,000 write IOPS, the highest in the MP400 family. These are burst figures through the drive's dynamic SLC cache, which spans approximately one-quarter of the 4 TB NAND array.

Independent reviewers consistently find the 4 TB model maintains its rated burst speeds for large data transfers, with the SLC cache covering roughly 1 TB of writes before the drive falls back to native QLC write speeds. The QLC post-cache write speed typically lands between 80 and 160 MB/s depending on workload. Guru3D's testing of the 4 TB model showed that thanks to the large NAND array and full channel utilization, the drive performed comparably to premium PCIe 3.0 x4 NVMe SSDs in most synthetic benchmarks. The larger SLC cache compared to smaller capacities means the 4 TB handles mixed workloads particularly well.

## Endurance, TBW & Warranty

Corsair backs the Force MP400 4 TB with a five-year limited warranty, ending at either the warranty period or 800 TBW of writes. At 20 GB of writes per day, the 800 TBW budget translates to roughly 109 years of use, far beyond any realistic consumer scenario. Even at a heavy 100 GB per day, the endurance lasts over 21 years. The MP400 incorporates Phison's SmartECC third-generation LDPC error correction, SmartRefresh for periodic block refresh, and end-to-end data protection. Factory overprovisioning of approximately 9 percent of the raw NAND capacity adds a reliability buffer. For comparison, the TLC-based Samsung 870 EVO 4 TB carries a 2,400 TBW rating, triple the MP400's endurance, reflecting the fundamental QLC versus TLC program-erase cycle difference.

## Pros and Cons

**Pros:**

- 4 TB capacity in a single M.2 2280 slot
- 610K/710K random IOPS highest in MP400 line
- 3,480/3,000 MB/s sequential throughput
- 800 TBW endurance rating
- Large 1 TB dynamic SLC cache
- 5-year warranty included
**Cons:**

- Double-sided PCB limits laptop compatibility
- PCIe 3.0 x4 only, not PCIe 4.0
- QLC slowdown after 1 TB SLC cache fills
- No AES 256 hardware encryption
- Endurance per GB below TLC alternatives


## Verdict

The Corsair Force MP400 4 TB targets users who need maximum NVMe capacity in a single M.2 slot and are willing to accept QLC trade-offs to get it. Content creators working with large media archives, gamers with extensive libraries, and NAS builders upgrading to all-NVMe storage will find the capacity compelling. Anyone doing frequent sustained writes of hundreds of gigabytes should consider TLC alternatives like the Samsung 980 Pro 2TB or WD Black SN850X, which maintain speed after their caches fill. The MP400 4 TB is a niche product that fills its niche well: maximum NVMe capacity at a lower cost per GB than TLC competitors.

## Frequently Asked Questions

### Is the Corsair Force MP400 4TB good for gaming?

Yes, the MP400 4 TB performs well for gaming. The 3,480 MB/s read speed and 610K random read IOPS handle game loading with ease. The massive 1 TB SLC cache means the drive will not slow down during typical game installs or updates. The 4 TB capacity holds a large game library on a single drive. The QLC post-cache slowdown only becomes relevant when writing more than roughly 1 TB of data in a single sustained transfer.

### Is the Corsair Force MP400 4TB compatible with the PS5?

The MP400 4 TB is not ideal for PS5 use. While it meets the read speed requirement at 3,480 MB/s, the double-sided PCB makes it physically incompatible with the PS5's M.2 slot, which only accepts single-sided drives or drives under 11.25 mm total height including heatsink. The 1 TB and 2 TB models are single-sided and are the better choices for PS5 upgrades.

### Does the Corsair Force MP400 4TB have a DRAM cache?

Yes, the MP400 4 TB includes a Nanya DDR3L DRAM chip for the flash translation layer. The DRAM-to-NAND ratio is approximately half the typical 1 MB per 1 GB standard, which suggests some FTL table compression or metadata prioritization. The drive also uses a dynamic SLC cache spanning roughly one-quarter of the 4 TB NAND array, providing approximately 1 TB of cached write capacity before reverting to native QLC speed.

### What is the TBW endurance of the Corsair Force MP400 4TB?

The MP400 4 TB is rated for 800 TBW (terabytes written) over its five-year warranty period. At a typical consumer write workload of 20 GB per day, the endurance ceiling translates to roughly 109 years of use. Even at a heavy 100 GB per day workload, the drive would take over 21 years to exhaust its rated writes. The 800 TBW is lower per GB than TLC drives in the same capacity, but the absolute number is generous for most consumer use cases.

### Why does the 4TB MP400 use a different controller than the 1TB and 2TB?

The 4 TB and 8 TB models use the Phison E12S PCIe 3.0 controller while the 1 TB and 2 TB use the Phison E16 PCIe 4.0 controller. The E12S is manufactured on TSMC's 12nm process, making it smaller and more thermally efficient, which matters when populating both sides of a double-sided PCB with dense QLC packages. The E12S also delivers higher random IOPS at 610K/710K, though it sacrifices PCIe 4.0 link speed.

### Is the Corsair Force MP400 4TB good for video editing?

For light video editing with project files under the roughly 1 TB SLC cache, the MP400 4 TB performs adequately with fast burst writes. For heavier workloads involving sustained 4K or 8K video transfers, the QLC post-cache write speed of 80-160 MB/s becomes a bottleneck. A TLC NVMe drive like the Samsung 980 Pro or WD Black SN850X sustains writes well past their cache limits and is a better fit for professional video editing.

### Does the Corsair Force MP400 4TB work in a laptop?

The MP400 4 TB uses a double-sided PCB, meaning NAND packages are mounted on both sides of the board. Many thin-and-light laptops only accept single-sided M.2 drives, so physical compatibility should be confirmed before purchase. Thicker gaming laptops and desktop replacements are more likely to accommodate double-sided drives. The drive draws up to 7.1 W during active reads, which is within most laptop M.2 power budgets.

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Last updated: 2026-05-17. Source: https://ssdrive.net/corsair-force-mp400-4-tb