# Lexar NM700 256GB SSD — In-Depth Review & Specs (2026)

The Lexar Professional NM700 256GB is an entry-level capacity in Lexar's PCIe 3.0 NVMe lineup. Powered by the Marvell 88SS1092 — a triple-core ARM Cortex R5 controller with 8 NAND channels and a dedicated DDR3 DRAM buffer — it delivers up to 3,500 MB/s sequential reads and 2,000 MB/s writes. For users upgrading from a SATA SSD or hard drive in an older system, the NM700 256GB offers a genuine NVMe experience at a modest price, though the 256 GB capacity is tight by modern standards.

Quick answer: The Lexar NM700 256GB is a competent PCIe 3.0 NVMe SSD for a specific use case: a budget boot drive in an older system that needs a DRAM-equipped NVMe drive rather than a DRAM-less alternative. The Marvell 88SS1092 controller is a proven performer with consistent latency thanks to its dedicated DRAM, and the 3,500 MB/s read speed saturates the PCIe 3.0 interface. The 256 GB capacity is the main limiting factor — it is too small for a primary drive in most 2026 workloads. If you can stretch to the 512GB or 1TB NM700, you will get both more space and higher write throughput. If you must live within this capacity, the NM700 is a solid step up from a SATA SSD.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 256 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Marvell 88SS1092 |
| Memory type | 3D TLC |
| DRAM cache | DDR3 DRAM |
| Sequential read | 3500 MB/s |
| Sequential write | 2000 MB/s |
| Random read IOPS | 293000 |
| Random write IOPS | 272000 |
| Endurance | 150 TBW |
| MTBF | 1.5 |
| Warranty | 5 years |

## Performance

Sequential throughput reaches 3,500 MB/s read and 2,000 MB/s write on the 256GB model — the read speed hits the PCIe 3.0 x4 ceiling, while the write speed is limited by the reduced NAND die count at this capacity. The 1TB sibling reaches 2,000 MB/s write or higher. Random 4K performance benefits from the dedicated DRAM buffer: expect roughly 200,000–300,000 IOPS read and 250,000–350,000 IOPS write. The DRAM keeps random I/O latency consistent under mixed workloads, an advantage over DRAM-less designs that can stutter when multitasking.

The SLC write cache on the 256GB model is relatively small — approximately 15–25 GB — reflecting the limited over-provisioning and free space at this capacity. Post-cache native TLC writes settle around 500–700 MB/s. For a boot drive handling OS updates, browser caches, and application writes, the cache is rarely stressed. Large sustained writes will push past it quickly, but that is not the expected use case for a 256GB drive. Thermal performance is good: the Marvell controller runs at moderate temperatures, and the drive rarely exceeds 65°C without a heatsink. Power consumption peaks at roughly 4–5 W under load.

## Endurance, TBW & Warranty

Lexar provides a limited warranty on the NM700 series, though the exact duration varies by region. The 256GB model is rated at 150 TBW endurance. Lexar's warranty service is administered through regional distributors — verify coverage terms with the seller before purchasing, especially in regions where Lexar's retail presence is limited.

## Pros and Cons

**Pros:**

- Marvell 88SS1092 with dedicated DDR3 DRAM — no HMB compromises
- 3,500 MB/s reads — PCIe 3.0 x4 saturation
- Consistent random I/O latency under mixed workloads
- Single-sided M.2 2280 fits any compatible slot
- Lexar/Longsys brand with established global distribution
**Cons:**

- 256 GB capacity is very tight for modern use cases
- Write speed (2,000 MB/s) limited by low NAND die count
- Small SLC cache (~15-25 GB) fills quickly under sustained writes
- NAND supplier not publicly disclosed
- Warranty terms vary by region — verify before purchase


## Verdict

The Lexar NM700 256GB is a competent PCIe 3.0 NVMe SSD for a specific use case: a budget boot drive in an older system that needs a DRAM-equipped NVMe drive rather than a DRAM-less alternative. The Marvell 88SS1092 controller is a proven performer with consistent latency thanks to its dedicated DRAM, and the 3,500 MB/s read speed saturates the PCIe 3.0 interface. The 256 GB capacity is the main limiting factor — it is too small for a primary drive in most 2026 workloads. If you can stretch to the 512GB or 1TB NM700, you will get both more space and higher write throughput. If you must live within this capacity, the NM700 is a solid step up from a SATA SSD.

## Frequently Asked Questions

### Is 256 GB enough for Windows 11?

Technically yes — Windows 11 requires 64 GB minimum. After the OS, drivers, and core applications, you will have roughly 150–180 GB free. This is workable for an office or browsing machine but very tight for gaming or content creation. A 512GB or larger drive is strongly recommended for most users.

### Does the NM700 have DRAM?

Yes. The Marvell 88SS1092 controller includes a dedicated DDR3 DRAM chip (typically 256–512 MB on the 256GB model). This is a key advantage over DRAM-less HMB designs, providing more consistent latency under mixed read/write workloads.

### Can I use this as an external drive?

Yes — in a USB 3.2 Gen 2 enclosure, the drive will perform at roughly 1,000 MB/s (the USB interface limit). The DRAM buffer and low power consumption make it well-suited for external use. At 256 GB, it works well as a fast portable drive for documents and small projects.

### How does it compare to the Samsung 970 EVO 250GB?

Both are DRAM-equipped PCIe 3.0 drives. The Samsung uses its in-house Phoenix controller and V-NAND, typically delivering higher sustained writes and random I/O. The Lexar is usually priced lower and uses the proven Marvell controller with third-party TLC. For a budget boot drive, the cheaper option wins.

### Will this work in a PS5?

No. The PS5 requires a PCIe 4.0 drive rated at 5,500 MB/s or above. The NM700 is PCIe 3.0 and does not meet the minimum requirements.

---

Last updated: 2026-05-23. Source: https://ssdrive.net/lexar-nm700-256-gb