MINISFORUM released the AR900i, an MoDT (mobile on desktop) motherboard in the Mini-ITX form factor that comes with a hardwired Intel Core i9-13900HX mobile processor and a pre-installed cooling solution. The board is priced at $560 on Amazon, with a limited-period $70-off coupon. This is good value, considering that the i9-13900HX is a maxed-out "Raptor Lake" based mobile processor that features all 8 P-cores, all 16 E-cores, and all 36 MB of shared L3 cache physically present on the "Raptor Lake" silicon. The P-cores boost up to 5.40 GHz, and the E-cores up to 3.90 GHz. The only catch with this processor compared to something like a desktop i9-13900, is its power specs that were originally designed for the power constraints of notebooks, with 55 W base power, and 157 W of maximum turbo power, compared to 225 W of the socketed i9-13900.

Since the Core i9-13900HX is a mobile BGA1964 package that remains hardwired to the board, it is not upgradable. MINISFORUM has designed a cooling solution specific to the processor, which uses a large aluminium fin-stack heatsink that relies on an 80 mm case fan for ventilation. There's a secondary fan-heatsink that provides cooling to two M.2-2280 slots north of the processor. Each of these two M.2 slots has a PCI-Express 5.0 x4 wiring, and using either of them subtracts 8 PCIe lanes from the board's sole expansion slot, a PCI-Express 5.0 x16. The board features an M.2 E-key slot that you can pair with your own WLAN card, it comes with provision for dual-MIMO ready antennas. The processor is wired to two DDR5 SO-DIMM slots supporting up to 96 GB of memory. The board draws power from a 24-pin ATX and a single 8-pin EPS, which should prove sufficient for this processor.