Silicon Motion introduces PCIe Gen6 SSD controller: up to 28 GB/s speeds, 512TB capacities

Silicon Motion has just announced its new MonTitan SM8466 PCIe Gen6 SSD controller, packing up to 28GB/sec speeds and huge 512TB capacities, aimed at the enterprise storage market.

2

The new Silicon Motion SM8466 SSD controller is part of the company's MonTitan family of controllers, designed specifically for enterprise-tier storage products. The new SM8466 SSD controller is based on the TSMC 4nm process node, supports the SCA interface, has capacities of up to a huge 512TB capacity, and offers huge performance increases over the company's current SM8366 controller.

Silicon Motion's new SM8466 PCIe Gen6 SSD controller is compliant with the new NVMe 2.0 interface and the new OCP NVMe SSD Spec 2.5, featuring SR-IOV / MPF, Namespaces, SMART monitoring, End-to-End Data Protection, Secure Boost, AES-256, TSC Opal, and Attestation support.

On the speed side of things, Silicon Motion's new MonTitan SM8466 PCIe Gen6 SSD controller has speeds of up to 28GB/sec, which is double that of the current PCIe Gen5 SSDs that are capable of 14GB/sec. We can also expect to see 7 million IOPS from the new Gen6 SSD controller.

Silicon Motion SM8466 Gen6 vs SM8366 Gen5 Controller Specs:

• 4nm vs 12nm
• 512 TB vs 128 TB
• 28 GB/s vs 14.2 GB/s
• 7.0M IOPS vs 3.5M IOPS

Silicon Motion only unveiled specifications for its next-gen MonTitan SM8466 PCIe Gen6 SSD controller at FMS 2025 (Flash Memory Summit 2025), but it'll be a few years before they enter the market. We recently reported that Gen5 SSDs will stay on the market until 2030 as Gen6 SSDs aren't ready for mainstream just yet, Gen5 SSDs haven't even penetrated the market properly.

We saw PCIe Gen6 on display at Computex 2025 a couple of months ago now, with up to 32TB/sec speeds on the show floor, something you can check out in the links above.