Lexar NM800 PRO 512GB

The Lexar NM800 PRO 512GB is a high-performance PCIe 4.0 NVMe storage solution built around the InnoGrit IG5236 "Rainier" controller, an 8-channel architecture fabricated on a 12nm process. This controller is paired with Micron’s 176-layer 3D TLC NAND (B47R) and utilizes dedicated DDR4 DRAM for logical-to-physical mapping table management. While the read throughput saturates the Gen4 bandwidth, the 512GB capacity operates with reduced interleaving capability due to fewer NAND dies, resulting in lower sequential write speeds compared to the 1TB and 2TB variants. The InnoGrit IG5236 controller is known to run at high operating temperatures; effective thermal management via a heatsink (integrated or motherboard-provided) is recommended to avoid thermal throttling during sustained transfers. Early iterations of IG5236-based drives faced scrutiny regarding firmware stability, specifically involving sudden controller locks, though later firmware updates generally addressed these reliability concerns.

Key Specifications

• Capacity: 512GB
• Interface: PCIe 4.0 x4 (NVMe 1.4)
• Controller: InnoGrit IG5236 (8-Channel)
• NAND Flash: Micron 176-Layer 3D TLC (B47R)
• Sequential Read/Write: 7,450 MB/s / 3,500 MB/s
• DRAM Cache: Discrete DDR4
• Endurance: 500 TBW
• Encryption: AES 256-bit
• Physical Layout: Single-sided PCB (M.2 2280)

Hardware Alternatives

• ADATA XPG S70 Blade / Patriot Viper VP4300: These drives are essentially hardware clones, sharing the same IG5236 controller and Micron 176-layer NAND configuration, offering nearly identical performance characteristics.
• Kingston KC3000 512GB: While using a different controller (Phison E18), this drive utilizes the same Micron 176-layer NAND, offering a similar endurance profile but slightly different firmware behavior regarding sustained write caching.
• WD Black SN850X: A primary competitor using a proprietary SanDisk/Western Digital architecture. The SN850X generally offers higher random I/O performance at the 512GB/1TB capacities compared to the InnoGrit platform.