# Nextorage NEM-PAC 4 TB: maximum-capacity PS5-optimised SSD with heatsink (2026)

The Nextorage NEM-PAC 4 TB is a PlayStation 5-optimised PCIe 4.0 x4 NVMe SSD with an integrated, non-removable heatsink, based on the Phison PS5027-E27T controller and Kioxia BiCS6 3D TLC NAND, rated 7,400 MB/s reads and 6,400 MB/s writes with a 5-year warranty.

Quick answer: The Nextorage NEM-PAC 4 TB is the maximum-capacity PlayStation 5-optimised drive: the Phison E27T controller and Kioxia BiCS6 TLC NAND of the line, full 7,400/6,400 MB/s performance with the highest balanced IOPS, the largest SLC cache, and an integrated cooling structure tuned for the PS5 — with a 5-year warranty.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5027-E27T |
| Memory type | Kioxia BiCS6 3D TLC |
| DRAM cache | No |
| Sequential read | 7400 MB/s |
| Sequential write | 6400 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 1050000 |
| Endurance | 2400 TBW |
| MTBF | 1500000 |
| Warranty | 5 years |

## Performance

The NEM-PAC 4 TB is rated at 7,400 MB/s sequential reads and 6,400 MB/s sequential writes over PCIe 4.0 x4, with 1,000,000 random read IOPS and 1,050,000 random write IOPS — the most balanced and highest combined IOPS in the line. The read speed exceeds the PlayStation 5's 5,500 MB/s requirement, so games load at full console speed.

The large 4 TB NAND array provides the biggest SLC write cache of the range, sustaining very large game installs and bulk copies at high speed for longer before throughput settles to native TLC write speed. The integrated cooling structure keeps the DRAM-less E27T controller stable through extended sessions inside the PS5's enclosed, low-airflow M.2 slot.

## Endurance, TBW & Warranty

Nextorage covers the NEM-PAC with a 5-year warranty and a 1,500,000-hour MTBF. Nextorage does not separately publish a TBW figure for the NEM-PAC; based on the same Kioxia BiCS6 TLC NAND used across the line at a 600 TBW-per-terabyte rate, the 4 TB is estimated at 2,400 TBW. Coverage ends at whichever comes first: five years or the rated endurance.

At a typical 30 GB of writes per day, reaching 2,400 TBW would take more than two centuries, so endurance is not a meaningful limit for console or desktop use. The 5-year warranty term is the binding factor.

## Pros and Cons

**Pros:**

- Maximum 4 TB capacity for a single PS5 expansion drive
- Full 7,400/6,400 MB/s with the line's highest balanced IOPS
- Largest SLC cache and best sustained write of the NEM-PAC range
- PS5-optimised integrated cooling structure
- Phison E27T with Kioxia BiCS6 162-layer 3D TLC NAND
- 5-year warranty
**Cons:**

- Higher absolute price than smaller capacities
- Non-removable heatsink can interfere with PC motherboard M.2 covers
- DRAM-less (HMB) — no dedicated DRAM cache
- Nextorage does not separately publish a TBW rating for the line
- Limited Western retail availability


## Verdict

The Nextorage NEM-PAC 4 TB is the maximum-capacity PlayStation 5-optimised drive: the Phison E27T controller and Kioxia BiCS6 TLC NAND of the line, full 7,400/6,400 MB/s performance with the highest balanced IOPS, the largest SLC cache, and an integrated cooling structure tuned for the PS5 — with a 5-year warranty.

It is the drive for a console owner who wants the most storage the PS5 supports in a single expansion slot, and a capable cooled Gen4 drive in a PC. The considerations are the higher absolute price, the non-removable heatsink that can complicate PC installs, and the line's unpublished TBW. For PC-only flexibility, the bare NN4LE 4 TB uses identical core hardware.

## Frequently Asked Questions

### Is 4 TB the largest SSD the PlayStation 5 supports?

4 TB is the largest practical single M.2 expansion drive the PlayStation 5 supports, and the NEM-PAC 4 TB fits that role with PS5 optimisation and an integrated heatsink. It lets you install a large permanent game library in one slot, alongside the console's internal storage, without swapping drives.

### How fast is the NEM-PAC 4 TB?

It is rated at 7,400 MB/s sequential reads and 6,400 MB/s sequential writes, with 1,000,000 read and 1,050,000 write IOPS — the most balanced IOPS in the line. The read speed exceeds the PlayStation 5's 5,500 MB/s requirement, and the large NAND array gives it the biggest SLC cache and strongest sustained write of the NEM-PAC range.

### Can the NEM-PAC 4 TB be used in a PC?

Yes, it is a standard PCIe 4.0 NVMe drive. The consideration is its integrated, non-removable heatsink, which may conflict with a motherboard's own M.2 heatsink or cover. For unconstrained PC use, the bare NN4LE 4 TB uses identical core hardware without the fixed heatsink.

### What controller and NAND does the NEM-PAC 4 TB use?

It uses the Phison PS5027-E27T, a four-channel, DRAM-less PCIe 4.0 controller, with Kioxia BiCS6 162-layer 3D TLC NAND and the host memory buffer in place of on-board DRAM — the same platform as the NEM-PAB, with PS5-focused tuning and an integrated heatsink.

### What is the TBW endurance of the NEM-PAC 4 TB?

Nextorage does not separately publish a TBW rating for the NEM-PAC. Based on the same Kioxia BiCS6 TLC NAND used across the line at 600 TBW per terabyte, the 4 TB is estimated at 2,400 TBW, with a 5-year warranty and 1,500,000-hour MTBF. At 30 GB written per day it would take more than two centuries to reach 2,400 TBW, so the warranty term is the only practical limit.

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Last updated: 2026-06-13. Source: https://ssdrive.net/nextorage-nem-pac-4-tb