Lexar NM790 8192GB

SSD Description

The Lexar NM790 8TB uses a Maxio MAP1602 controller paired with YMTC 232-layer 3D TLC (Xtacking 3.0). It is a DRAM-less design that relies on NVMe 1.4 Host Memory Buffer (HMB) to manage mapping tables via system RAM, enabling an 8TB capacity on a single-sided 2280 PCB without using QLC NAND.

Key Specifications

• Interface: PCIe 4.0 x4 (NVMe 1.4)
• Sequential Read/Write: 7400 MB/s Read, 6500 MB/s Write
• Controller: Maxio MAP1602A (4-channel, ARM Cortex-R5)
• NAND Flash: YMTC 232-Layer 3D TLC (Xtacking 3.0)
• DRAM Cache: None (HMB Support: ~64MB)
• Physical Trait: Single-sided PCB (2280 form factor)
• Endurance: High-durability TLC rating (scales with capacity)

Hardware Alternatives

• Acer Predator GM7 / Netac NV7000-t / Addlink S93: share the MAP1602 controller and YMTC 232-layer NAND reference platform with similar theoretical performance, though firmware tuning and warranty terms vary by vendor.
• Samsung 990 PRO / WD Black SN850X: primary performance targets that use proprietary controllers with dedicated DRAM, offering potential latency advantages in heavy random I/O workloads.
• TeamGroup MP44: direct hardware rival in the high-capacity segment, frequently utilizing similar controller logic.
• Sabrent Rocket 4 Plus (8TB): alternative high-capacity option using the Phison E18 controller with DRAM, typically requiring a double-sided physical layout.