Minisforum MS-S1 Max (Ryzen AI Max+ 395, 128GB)

The Minisforum MS-S1 Max is a mini PC on AMD's Ryzen AI Max+ 395 with 128GB of unified memory, dual 10GbE, USB4 v2 and the only PCIe x16 slot in its class. It is our first pick for a small firm's private assistant. The one thing to know: unified memory lets it load large mixture-of-experts models; dense 70B models are slow and there is no CUDA.

Why is the MS-S1 Max our pick?

• ServeTheHome (Jan 2026): the "best Ryzen AI Max mini-PC yet", 5–10 W idle, about 200 W sustained; TechRadar: the best AI mini workstation it had reviewed.
• The PCIe slot is electrically x4, the second M.2 is Gen4 x1, and the Realtek 10GbE lacks RoCE (ServeTheHome).
• Pricing reads: $3,799 (Ryzen AI Max+ 395, 128GB/2TB; regular price $4,749 on Minisforum's own store), estimated to ship mid-September; a 64GB edition is sold separately — store.minisforum.com, Sep 2026. Launched at $2,299 (VideoCardz).
• 2-year warranty, soldered memory, no on-site service; a 192GB MS-S1 MAX-P495 successor was announced in September 2026, unpriced.

Who should skip it

Anyone who needs enterprise service: the HP Z2 Mini G1a. Anyone who can wait: the 192GB successor. More in AI computing.

Research-based listing — not hands-on tested by Digital4All; details as of September 2026.