PCIEx16 drops to x 8 when M2 SSD is installed???

Differences Between M2 Cards M2 Slots Keys Sizes and Types m 2 ssd motherboard slot Our Top Tested Picks · Crucial P3 · WD Black SN850X · Crucial T705 · WD Blue SN570 · Addlink AddGame A93 · Crucial T500 · TeamGroup MP44 · Samsung SSD 990 Pro With m2 slot mainboard 2 slot supports 4X 1 x R7HGK - Thermal pad 1 x YYJF8

m2 slot types , I'll go step by step on how to add an to an occupied one-slot setup Product Links