Silicon Motion SM2508 - PCIe Gen5 x4 NVMe 2.0 SSD Controller

Specifications

Overview

The Silicon Motion SM2508 is a PCIe Gen5 x4 NVMe 2.0 client SSD controller built on TSMC's 6 nm process with a quad-core ARM Cortex-R8 CPU. It drives eight NAND channels at up to 3600 MT/s, which is what lets it reach up to 14.5 GB/s sequential read, 13.6 GB/s sequential write and up to 2.5 million IOPS for both random read and write.

The design's emphasis is power efficiency: the controller operates below 7 W and drops to under 2 mW in its PS4 state, roughly 30% lower active power than the prior generation at far higher throughput. That matters in M.2 2280 SSDs inside laptops, AI-capable PCs and compact workstations where a Gen5 drive's heat and power draw are the limiting factors, not the interface. Capacities run to 8 TB and TCG Opal 2.0 is available as an option.

Key Benefits

PCIe Gen5 x4 with NVMe 2.0 for current-generation throughput. Up to 14.5 GB/s read and 2.5M IOPS. Under 7 W active power eases M.2 thermal limits. Sub-2 mW PS4 state for notebook battery life. 8 channels at 3600 MT/s for high-capacity drives to 8 TB. End-to-end data path protection built in.

Applications

Retail and OEM PCIe Gen5 M.2 SSDs, AI-capable notebooks and desktops, creator workstations, and any client platform where Gen5 performance must coexist with a tight power and thermal budget.

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