# Lexar NM700 512GB SSD — In-Depth Review & Specs (2026)

The Lexar Professional NM700 512GB is the mid-capacity option in Lexar's PCIe 3.0 NVMe lineup. It shares the same Marvell 88SS1092 triple-core ARM controller and dedicated DDR3 DRAM buffer as its siblings, delivering up to 3,500 MB/s sequential reads and 2,000 MB/s writes. At 512 GB, it provides enough space for a comfortable Windows or Linux installation with room for a core application suite and a modest game library, making it a practical sweet spot for budget-conscious builders upgrading from SATA.

Quick answer: The Lexar NM700 512GB hits a practical sweet spot: enough capacity for a comfortable daily-driver system, a DRAM-equipped Marvell controller that delivers consistent latency, and 3,500 MB/s reads that saturate the PCIe 3.0 bus. It is not the fastest Gen3 drive on the market — the write speed is conservative, and the NAND source is undisclosed — but it executes the fundamentals well. For an older system that only supports PCIe 3.0, or a budget build where every dollar counts, the NM700 512GB is a dependable step up from SATA. Just be sure to check warranty terms in your region, as Lexar's coverage varies by market.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 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 | 300 TBW |
| MTBF | 1.5 |
| Warranty | 5 years |

## Performance

Sequential throughput is rated at 3,500 MB/s read and 2,000 MB/s write. The read speed saturates the PCIe 3.0 x4 interface; the write speed, while identical on paper to the 256GB model, benefits in practice from the 512GB model's additional NAND dies — sustained writes maintain their peak longer, and the SLC cache is deeper at roughly 30–50 GB. Post-cache native TLC writes settle around 600–800 MB/s, which is respectable for a Gen3 drive.

Random 4K performance in the 250,000–350,000 IOPS range for both reads and writes is competitive with other DRAM-equipped PCIe 3.0 drives like the Samsung 970 EVO and WD Black SN700 (2018). The dedicated DRAM buffer keeps tail latency low under sustained mixed workloads — a measurable advantage over HMB-based designs. In PCMark 10 storage benchmarks, the NM700 512GB scores in the upper-middle of the Gen3 pack, delivering application-level responsiveness that feels close to newer Gen4 drives in everyday use.

Thermal output is moderate. The Marvell 88SS1092 runs warmer than entry-level DRAM-less controllers but cooler than high-performance Phison designs. Without a heatsink, the drive settles around 65–70°C under sustained load — warm but within safe operating range. A basic motherboard M.2 heat spreader is sufficient to keep temperatures in the 55–60°C zone. Power consumption peaks at roughly 5 W under load and idles under 100 mW.

## Endurance, TBW & Warranty

Lexar provides a limited warranty on the NM700 series. Warranty duration and terms vary by region — verify with the seller or Lexar's regional distributor before purchase. The 512GB model is rated at 300 TBW endurance, which serves as the warranty write limit.

## Pros and Cons

**Pros:**

- Marvell 88SS1092 with dedicated DDR3 DRAM — consistent latency
- 3,500 MB/s reads — PCIe 3.0 x4 saturation
- 512 GB — practical capacity for a standalone system drive
- 300 TBW endurance — double the 256GB rating
- Single-sided M.2 2280 fits any compatible slot
**Cons:**

- 2,000 MB/s writes are conservative for a DRAM-equipped Gen3 drive
- NAND supplier not publicly disclosed
- Marvell controller runs warmer than entry-level alternatives
- Warranty terms vary significantly by region
- Limited availability compared to Samsung/WD/Crucial alternatives


## Verdict

The Lexar NM700 512GB hits a practical sweet spot: enough capacity for a comfortable daily-driver system, a DRAM-equipped Marvell controller that delivers consistent latency, and 3,500 MB/s reads that saturate the PCIe 3.0 bus. It is not the fastest Gen3 drive on the market — the write speed is conservative, and the NAND source is undisclosed — but it executes the fundamentals well. For an older system that only supports PCIe 3.0, or a budget build where every dollar counts, the NM700 512GB is a dependable step up from SATA. Just be sure to check warranty terms in your region, as Lexar's coverage varies by market.

## Frequently Asked Questions

### Is 512 GB enough for a primary drive?

Yes, for most users. Windows 11, core productivity apps, and 3–5 modern games will fit comfortably with room to spare. Content creators working with large media files or users with extensive game libraries may prefer 1TB or larger.

### Does the NM700 support hardware encryption?

The Marvell 88SS1092 controller supports TCG Opal 2.0 and AES-256 hardware encryption. However, Lexar may not enable or certify these features in firmware. Check the specific firmware revision for encryption support if this is a requirement.

### How does it compare to the NM800?

The NM800 is Lexar's PCIe 4.0 drive, delivering roughly 7,000/5,500 MB/s — roughly double the NM700's throughput. The NM800 is the better choice for a newer system with PCIe 4.0 support. The NM700 makes sense for PCIe 3.0 systems or when budget is the primary constraint.

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

Yes. In a USB 3.2 Gen 2 enclosure, speeds cap at roughly 1,000 MB/s. For full performance, use a Thunderbolt 3/4 enclosure. The DRAM buffer and moderate power draw make it a good candidate for external use.

### Is Lexar a reliable brand?

Lexar has been in the flash storage business for over two decades, originally as a Micron subsidiary and now owned by Longsys (one of the largest flash storage manufacturers in China). Their products are generally reliable, though warranty support infrastructure is not as extensive as Samsung or WD in all regions.

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Last updated: 2026-05-23. Source: https://ssdrive.net/lexar-nm700-512-gb