Solved: M.2 Slots for Motherboard 8860 A(SMVB)
Looking at HP specs and documentation, it appears that HP Z2 G4 towers might come standard with two M.2 slots on the motherboard.
Mainboard ASUS TUF B450-PRO GAMING
AMD AM4 Micro-ATX professional motherboard, M.2, MSI PRO ... DIMM Slots. ... M.2 Slot. ... AMD® B450 Chipset.
Mainboard Gigabyte S -Intel Z790- LGA1700(12+13+14th)
... 3 x M.2 slots, 6 x SATA 6Gb/s ports. NEW MAINBOARD Gigabyte B760M AORUS ELITE ... 2 Micro-ATX Motherboard with USB 3.1 Maximize your connectivity and speed with ...