m2 pcie 4.0 in 3.0 slot
Can I Use a PCIe 3.0 Card in a 2.0 Slot? - PC Guide 101
The card takes a PCIe 4.0 x16 slot (can be run at PCIe 3.0 mode, for what it’s worth), and branches out into four PCIe 4.0 M.2 slots.
Can I Use a PCIe 3.0 Card in a 2.0 Slot? - PC Guide 101
A PCIe 4.0 NVMe SSD will work in a PCIe 3.0 M.2 motherboard slot at PCIe 3.0 speeds.
HP Desktop PCs - Motherboard Specifications, Cambridge
Expansion Slots. Intel® 12th Gen Processors* 1 x PCIe 5.0/4.0/3.0 x16 slot. Intel® Z690 Chipset** 1 x PCIe 4.0/3.0 x16 slot (supports x4 mode)