GeeCoolGuest
GeeCoolLaptops are chosen as whole machines; the motherboard isn't a selectable item. When picking a 12900HK model, check: soldered vs. socketed memory (future expansion), M.2 slot count, USB types and count, video output, and charger capacity.
For gaming, also check the MUX/direct-GPU switch, performance modes, and the cooler spec (heatpipe count, fan size), available on the brand's spec page or teardown reviews. The same CPU performs differently across machines — judge the whole laptop.