Technical Specifications
| Controller | Sierra FC6161 "Lhotse" |
| Interface | PCIe Gen6 x4, NVMe |
| Sequential Read | 28.5 GB/s |
| Sequential Write | 20.0 GB/s |
| Random Read | 6.9M IOPS |
| Random Write | 1.0M IOPS |
| Read Power | < 7W (full performance) |
| Write Power | < 9.5W (full performance) |
| Capacity | 16TB – 32TB (4KB IU); up to 256TB (16KB IU) |
| Features | NVMe, OCP, Flexible Data Placement (FDP), 128 virtual functions |
| Tape-Out | May 2026 (chip-out) |
| Stock | Available (Quote) |
| Price | Quote |
Product Overview
The FADU Sierra FC6161, codenamed "Lhotse," is a PCIe Gen6 enterprise SSD controller and complete drive platform — the first finished, physical PCIe Gen6 SSD demonstrated on a public stage at FMS 2026. Delivering 28.5 GB/s sequential reads and 20 GB/s writes with 6.9M random-read IOPS at under 7W read power, it doubles the bandwidth of PCIe Gen5 while enabling KV cache and other hot AI data to move from high-bandwidth memory to SSD. With capacities scaling from 16TB (4KB IU) up to 256TB (16KB IU), support for 128 virtual functions, and enhanced NVMe/OCP/Flexible Data Placement, the FC6161 targets AI inference, training data lakes, and hyperscale deployments. Available through QS Compute with competitive pricing and global logistics support.
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