# Nextorage NN4LE 1 TB: DRAM-less PCIe 4.0 with Kioxia BiCS6 NAND (2026)

The Nextorage NN4LE 1 TB is a PCIe 4.0 x4 NVMe SSD from the G Series LE line, built on the Phison PS5027-E27T controller with Kioxia BiCS6 3D TLC NAND and a host-memory-buffer design, rated 7,400 MB/s reads and 6,100 MB/s writes with 600 TBW of endurance and a 5-year warranty.

Quick answer: The Nextorage NN4LE 1 TB is a strong DRAM-less PCIe 4.0 drive: the efficient Phison E27T controller, current Kioxia BiCS6 TLC NAND, full 7,400 MB/s reads, and a 5-year warranty with 600 TBW endurance from a Sony-derived Japanese brand.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 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 | 6100 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 850000 |
| Endurance | 600 TBW |
| MTBF | 1500000 |
| Warranty | 5 years |

## Performance

The NN4LE 1 TB is rated at 7,400 MB/s sequential reads and 6,100 MB/s sequential writes over PCIe 4.0 x4, with 1,000,000 random read IOPS and 850,000 random write IOPS. The reads sit at the top of what PCIe 4.0 delivers, and the random figures are competitive with the best DRAM-less Gen4 drives.

The DRAM-less HMB design keeps power and heat low, and the E27T is efficient enough that the bare NN4LE rarely needs more than basic airflow in a desktop. As the smallest capacity in the line, the 1 TB has the most modest SLC write cache, so the longest sustained writes will eventually drop to native TLC speed sooner than on the 2 TB or 4 TB. For gaming, content loading, and everyday desktop use, performance is strong and close to DRAM-equipped Gen4 drives in the tasks users actually notice.

## Endurance, TBW & Warranty

Nextorage covers the NN4LE with a 5-year warranty. The 1 TB model is rated for 600 TBW (terabytes written) and an MTBF of 1,500,000 hours, with coverage ending at whichever limit comes first: five years from purchase or 600 TBW of cumulative writes.

At a typical 30 GB of writes per day, reaching 600 TBW would take roughly 54 years, so the 5-year term is the binding limit for normal use. Even at a heavy 100 GB per day, the endurance rating spans about 16 years. For desktop and gaming workloads the TBW ceiling is not a practical concern; the warranty length is the limiting factor.

## Pros and Cons

**Pros:**

- Phison PS5027-E27T reaches the full 7,400 MB/s PCIe 4.0 read ceiling
- Current Kioxia BiCS6 162-layer 3D TLC NAND
- Efficient DRAM-less design runs cool with minimal airflow
- High random read IOPS (1,000,000)
- 5-year warranty with 600 TBW endurance
- Single-sided M.2 2280 fits laptops and compact builds
**Cons:**

- DRAM-less (HMB) — no dedicated DRAM cache
- 1 TB has the smallest SLC write cache in the line
- Ships bare — needs a separate heatsink for PlayStation 5 use
- Lower write IOPS (850,000) than read
- Limited Western retail availability


## Verdict

The Nextorage NN4LE 1 TB is a strong DRAM-less PCIe 4.0 drive: the efficient Phison E27T controller, current Kioxia BiCS6 TLC NAND, full 7,400 MB/s reads, and a 5-year warranty with 600 TBW endurance from a Sony-derived Japanese brand.

It fits a Gen4 desktop or laptop that wants a fast, cool-running mainstream NVMe drive at 1 TB. Buyers who want this drive in a PlayStation 5 should choose the heatsink-equipped NEM-PA version instead, and those wanting more capacity and a larger SLC cache should consider the 2 TB or 4 TB NN4LE.

## Frequently Asked Questions

### What controller and NAND does the Nextorage NN4LE use?

The NN4LE uses the Phison PS5027-E27T, a four-channel, DRAM-less PCIe 4.0 controller, paired with Kioxia BiCS6 162-layer 3D TLC NAND. It uses the host memory buffer instead of an on-board DRAM chip. The E27T reaches the full PCIe 4.0 sequential ceiling of around 7,400 MB/s while remaining power-efficient.

### Can the NN4LE be used in a PlayStation 5?

Technically it is a compatible PCIe 4.0 drive, but the NN4LE ships bare with no heatsink, and the PS5 requires a heatsink for M.2 expansion drives. You would need to add a compatible heatsink. Nextorage sells the same class of drive with a heatsink as the NEM-PA series, which is the intended drop-in PS5 option.

### Does the NN4LE have a DRAM cache?

No. The NN4LE is DRAM-less and uses the host memory buffer (HMB), borrowing a small amount of system RAM for its address-mapping table. This keeps cost, heat, and power down. Paired with the efficient E27T and Kioxia BiCS6 NAND, real-world performance is close to DRAM-equipped Gen4 drives for typical use.

### How fast is the NN4LE 1 TB?

It is rated at 7,400 MB/s sequential reads and 6,100 MB/s sequential writes, with 1,000,000 read and 850,000 write IOPS. The reads are at the top of the PCIe 4.0 range. As the smallest capacity in the line, its SLC write cache is the most modest, so very large sustained writes settle to native TLC speed sooner than on the 2 TB or 4 TB.

### What is the TBW endurance of the NN4LE 1 TB?

The 1 TB model is rated for 600 TBW (terabytes written) with a 1,500,000-hour MTBF. The 5-year warranty covers whichever comes first: five years or 600 TBW. At 30 GB written per day it would take roughly 54 years to reach 600 TBW, so the warranty period is the practical limit, not the endurance rating.

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Last updated: 2026-06-13. Source: https://ssdrive.net/nextorage-nn4le-1-tb