Lexar NM700 512GB SSD — In-Depth Review & Specs
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.
The Marvell 88SS1092 is a full-featured 8-channel PCIe 3.0 x4 controller running three ARM Cortex R5 cores at up to 500 MHz. Unlike the DRAM-less designs that dominate the budget segment, the 88SS1092 includes a dedicated DDR3 DRAM chip (typically 512 MB of Nanya DDR3-1866 on the 512GB model) for the flash translation layer mapping table. The NAND is 3D TLC packaged by Longsys, Lexar's parent company — the flash supplier is not publicly disclosed, which is common for this tier of drive.
Lexar is a well-known brand in the consumer storage market, with products ranging from SD cards to portable SSDs to NVMe drives. The NM700 was their mainstream PCIe 3.0 offering, slotting below the faster NM800 PCIe 4.0 series. At 512 GB, the NM700 crosses the practical threshold for a standalone system drive: Windows or Linux, office and creative applications, and a handful of frequently played games all fit comfortably. The 300 TBW endurance rating doubles the 256GB model's 150 TBW, providing 164 GB of writes per day over the 5-year lifespan.
The drive uses a standard single-sided M.2 2280 form factor and works in any PCIe 3.0 or newer M.2 slot. The Marvell controller and DRAM buffer combination provides consistent latency that budget DRAM-less drives cannot match — an advantage that is most noticeable when the system is multitasking or running mixed read/write workloads.
✅ Storage Comparisons:
🚀 Performance and benchmarks
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.
Lexar NM700 512 GB vs M.2 3.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 3.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- Lexar NM700 512 GB (this drive): 3,500 MB/s read, 2,000 MB/s write
- ADATA SX 8800 Pro 512 GB: 3,500 MB/s read, 2,700 MB/s write
- ADATA SX 8800 Pro 1 TB: 3,500 MB/s read, 2,700 MB/s write
- ADATA XPG Spectrix S40G RGB 256 GB: 3,500 MB/s read, 3,000 MB/s write
- ADATA XPG Spectrix S40G RGB 512 GB: 3,500 MB/s read, 3,000 MB/s write
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 and 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.
📊 Specs
| Category | Value |
|---|---|
| Capacity [?] | 512 GB |
| Interface [?] | M.2 3.0 x 4 |
| Controller [?] | Marvell 88SS1092 |
| Memory type [?] | 3D TLC |
| DRAM [?] | DDR3 DRAM |
| Read speed (MB/s) [?] | 3500 |
| Write speed (MB/s) [?] | 2000 |
| Read IOPS [?] | 293000 |
| Write IOPS [?] | 272000 |
| Endurance (TBW) [?] | 300 |
| MTBF (million hours) [?] | 1.5 |
| Warranty (years) [?] | n/a |
Conclusion
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.
+ 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
🛒 Buy this or similar SSD Storage:
✨ Video Review
Lexar NM700 Gen 3x4 NVMe M.2 - Is It The One to Get?
