TurboVS
Lexar NQ780 4TB specifications and in-depth review

Lexar NQ780 4TB

Manufacturer: Lexar

The Lexar NQ780 4TB is a high-capacity M.2 NVMe solid-state drive built around the PCIe 4.0 interface, making it a substantial storage option for systems that support the standard. It ships without an integrated heatsink and forgoes RGB lighting, keeping the design straightforward. The drive carries a 5-year warranty and is rated for a mean time between failures of 1.5 million hours, reflecting a reasonable level of stated long-term reliability.

On the performance side, the NQ780 4TB is rated for 7000 MB/s sequential read and 6000 MB/s sequential write speeds, with the InnoGrit IG5236 Rainier controller managing eight channels across the QLC NAND. It uses a Host Memory Buffer cache scheme rather than dedicated DRAM, and adheres to the NVMe 1.4 specification. The drive is rated to handle up to 2400 terabytes written over its lifetime, operates within a maximum temperature of 70°C, and carries a shock resistance rating of 1500G. Hardware encryption is not supported on this model.

Pros
  • Sequential read speed reaches 7000 MB/s, enabling fast large-file transfers over the PCIe 4.0 interface
  • 4000GB capacity offers substantial internal storage in the compact M.2 form factor
  • TBW rating of 2400 means the drive is rated to handle a significant volume of write operations over its lifetime
  • MTBF of 1.5 million hours and a 5-year warranty reflect a solid stated reliability profile
  • Shock resistance rated at 1500G provides a degree of robustness against physical impact
  • 8-channel controller configuration supports efficient data throughput across the QLC NAND
Cons
  • QLC NAND typically exhibits lower write endurance per cell compared to other NAND types, which is reflected in the HMB cache approach rather than dedicated DRAM
  • No hardware AES encryption support, which may be a limitation for security-conscious use cases
  • Relies on Host Memory Buffer rather than dedicated onboard cache, which can affect sustained write consistency under heavy workloads
  • No integrated heatsink included, requiring users in thermally constrained builds to source their own cooling solution
  • Maximum operating temperature of 70°C leaves limited headroom in systems with poor airflow
Who is this for?

This drive suits users who need high-capacity M.2 NVMe storage in a PCIe 4.0-compatible system, such as content creators working with large media files or power users managing substantial data libraries. The 7000 MB/s sequential read speed makes it well-matched for workloads that involve frequent large-file reads, and the 2400 TBW endurance rating combined with a 5-year warranty makes it a reasonable fit for moderately demanding long-term use. Its 1500G shock resistance also suits desktop or workstation builds where physical stability is a given.

Who is this NOT for?

Users with strict data security requirements will find the lack of hardware AES encryption a meaningful limitation. The reliance on Host Memory Buffer instead of dedicated DRAM cache can lead to inconsistent sustained write performance under continuous heavy workloads, making the drive less suitable for write-intensive server or NAS environments. Additionally, systems with limited airflow or no heatsink provisions may struggle to keep the drive within its 70°C operating ceiling, so it is not well-suited to thermally constrained builds without additional cooling measures.

Read speed:

sequential read speed 7000 MB/s

The Lexar NQ780 4TB is rated for a sequential read speed of 7000 MB/s, reflecting the throughput ceiling for large, contiguous data transfers on this drive.

Write speed:

sequential write speed 6000 MB/s

The Lexar NQ780 4TB supports a sequential write speed of 6000 MB/s, representing the maximum throughput the drive can sustain when writing large blocks of data in sequence.

Benchmarks:

General info:

type M2
SSD cache HMB (Host Memory Buffer)
Is an NVMe SSD ✓
NVMe version 1.4
internal storage 4000GB
controller InnoGrit IG5236 Rainier
SSD storage type QLC
PCI Express (PCIe) version 4
Controller channels 8
Terabytes Written (TBW) 2400
MTBF 1.5million hours
warranty period 5 years
Has an integrated heatsink ✕
maximum operating temperature 70 °C
bits of encryption supported 0
shock resistance 1500G
has RGB lighting ✕

The Lexar NQ780 4TB is an M.2 NVMe SSD conforming to the NVMe 1.4 specification and using a PCIe 4.0 interface, with 4000GB of internal storage built on QLC NAND. It is managed by the InnoGrit IG5236 Rainier controller operating across 8 channels, and relies on HMB (Host Memory Buffer) rather than dedicated onboard cache. Endurance is rated at 2400 TBW with an MTBF of 1.5 million hours, and the drive carries a 5-year warranty. It operates at a maximum temperature of 70°C and holds a shock resistance rating of 1500G. Hardware AES encryption is not supported, and the drive ships without an integrated heatsink or RGB lighting.

Final Verdict

The Lexar NQ780 4TB is a high-capacity M.2 NVMe drive that delivers on raw throughput, with its 7000 MB/s sequential read speed and PCIe 4.0 interface making it a capable choice for users who regularly move large volumes of data on compatible systems. Backed by a 2400 TBW endurance rating, a 1.5-million-hour MTBF, and a 5-year warranty, it presents a solid reliability profile for general-purpose and content-focused workloads. That said, the absence of dedicated DRAM cache and hardware encryption, combined with the need for adequate system cooling, means it is best suited to environments where those factors are either managed externally or simply not a priority. For users whose systems check those boxes, the NQ780 4TB represents a well-specified high-capacity storage option within the PCIe 4.0 M.2 segment.