AOOSTAR is expanding its Mobile on Desktop lineup with a new Mini-ITX MoDT motherboard built around AMD’s Ryzen 9 9955HX3D, a high-end “Fire Range” mobile processor that brings 3D V-Cache to a compact desktop-friendly platform. After previously rolling out a larger mATX option, this Mini-ITX release targets builders who want top-tier gaming performance and strong efficiency in small form factor PCs.
At the heart of the board is the AMD Ryzen 9 9955HX3D, a 16-core, 32-thread chip that can boost up to 5.4 GHz. A major highlight is its massive 144 MB cache delivered through a single 3D V-Cache-enhanced compute die, which is designed to improve gaming performance by keeping more data close to the cores. While this processor is intended for laptops, it has been increasingly adopted in Mini PCs and MoDT motherboards thanks to its performance-per-watt advantages.
Against Intel’s Core Ultra 9 285HX, the Ryzen 9 9955HX3D is positioned as a serious gaming contender, with reported gains that can range from single digits to major uplifts depending on the title. Performance claims include modest improvements in games like Black Myth: Wukong and Call of Duty: Black Ops 6, and much larger leads in titles such as Watch Dogs: Legion and Civilization VII—reaching up to a reported 44% advantage in certain scenarios.
Beyond the CPU, the motherboard itself is packed with features that matter to enthusiasts building a powerful Mini-ITX system. AOOSTAR equips the board with an 8-phase power design, along with two DDR5 DIMM slots supporting up to 128 GB of memory and speeds up to 5600 MT/s. For expansion, there’s a full PCIe 5.0 x16 slot for modern graphics cards, plus two PCIe 5.0 x4 M.2 slots for fast NVMe storage.
Connectivity also gets a premium treatment. The rear I/O includes dual 10GbE LAN ports for high-speed networking, four USB ports, and a USB Type-C port. Storage-heavy builds aren’t left out either, with four SATA III ports included for additional drives.
Visually, the board adopts a clean black-and-silver look, and power is handled through a single 8-pin EPS connector. Cooling support appears well considered, with heatsinks over the VRM area near the I/O panel and over the chipset. The CPU is topped with a large heat spreader designed to make direct contact with an AM5/AM4-compatible CPU cooler, which should simplify cooling choices for small form factor builders aiming to keep temperatures under control.
Power targets are another key advantage of this MoDT approach. The Ryzen 9 9955HX3D comes with a base TDP of 54W, configurable to 75W, and it can be tuned higher in MoDT implementations—reported up to 135W—giving builders flexibility to balance efficiency, thermals, and maximum performance.
Pricing is expected to land around $500 in the US, which could make this an appealing value play in the high-performance Mini-ITX space. Buying a comparable desktop Ryzen X3D chip and a separate Mini-ITX motherboard can cost significantly more, and the mobile CPU’s efficiency may be especially attractive for compact gaming PCs that need strong performance without excessive heat or power draw.
For anyone planning a small but serious gaming build, AOOSTAR’s Mini-ITX MoDT with the Ryzen 9 9955HX3D looks like a compelling option, combining 3D V-Cache gaming benefits, modern PCIe 5.0 expansion, and high-end connectivity in a space-saving form factor.
