# Lexar NM790 4TB NVMe SSD technical specs (2026)

How fast is the Lexar NM790 4TB and extra specs explore on this site.

Quick answer: Lexar NM790 4TB support PCIe 4.0 that is twice faster than PCIe Gen3. The write speed is 6500 Mb/s, that is faster than has most of rivals. The Lexar NM790 provide possibility to write 1 TBW, that is not much compared to nearest rivals. Weighing all these factors, our editor strongly advise to purchase Lexar NM790 4TB for your PC.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Maxiotech MAP1602A |
| Memory type | YMTC 232-L TLC |
| DRAM cache | No |
| Sequential read | 7400 MB/s |
| Sequential write | 6500 MB/s |
| Random read IOPS | 7400000 |
| Random write IOPS | 6500000 |
| Endurance | 1 TBW |
| MTBF | 2000000 |
| Warranty | 3 years |

## Performance

Internal SSD use PCIe M.2 4.0 x 4 expansion standard with maximum read speeds 7400 MB/s, and write speeds equals to 6500 MB/s. It also has input/output performance 6500000 on writing and 7400000 on reading operations.

## Endurance, TBW & Warranty

Lexar provide 3 years warranty limited by endurance 1 TBW. The NM790 has 2000000 million hours mean time between failure.

## Pros and Cons

**Pros:**

- Excellent writing speed
- PCIe 4.0
- Capacity
**Cons:**

- Writing speed


## Verdict

Lexar NM790 4TB support PCIe 4.0 that is twice faster than PCIe Gen3. The  write speed is 6500 Mb/s, that is faster than has most of rivals. The Lexar NM790 provide possibility to write 1 TBW, that is not much compared to nearest rivals. Weighing all these factors, our editor strongly advise to purchase Lexar NM790 4TB for your PC.

## Frequently Asked Questions

### Does Lexar NM790 4TB have DRAM?

The Lexar NM790 has No. Dynamic Random-Access Memory makes drive work faster, but more expensive. 

### Does Lexar NM790 need a heatsink?

The Lexar NM790 due to the high density of memory chips require the installation of additional heat sink. It decrease temperature of the memory chips and controller. Some motherboards designed with thermal pads above or below the SSD for better productivity during heavy loads.

### Is the NM790 4TB fast?

The NM790 4TB has maximum write speed 6500 Mbps, maximum read speed 7400 Mb/s. NVMe run on Maxiotech MAP1602A controller and M.2 4.0 x 4 interface standard. The NAND memory type is YMTC 232-L TLC.

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Last updated: 2026-08-30. Source: https://ssdrive.net/lexar-nm790-4-tb