| Controller | Channels | USB Version | Best For | Typical Speed (Write) | | :--- | :--- | :--- | :--- | :--- | | | 1 | 3.2 Gen 1 | Budget mainstream drives | 40-80 MB/s | | PS2251-07 | 2 | 3.2 Gen 1 | Performance USB drives | 80-150 MB/s | | PS2251-08 | 2 | 3.2 Gen 2 | High-end USB 3.2 | 200-350 MB/s | | PS2305 | 1 | 2.0 | Legacy/boot drives | 15-25 MB/s |
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