Make sure this fits
by entering your model number..
ASRock B450M PRO4 Socket AM4/AMD Promontory B450/DDR4/Quad CrossFireX/SATA3&USB3 1/M 2/A&GBE/MicroATX Motherboard (New Item!). Slots 2x PCI-Express 3 0 x16 Slots (one runs at x8) 2x PCI-Express 2 0 x16 Slots (two run at x4) 1x PCI-Express 2 0 x1 Slot
This site does not sell the items directly, by clicking on the link you will visit the relevant amazon page and for each eligible purchase may be awarded a commission to the webmaster. You can also ask questions about specific aspects of the items such as shipping, purchase and anything else directly on the amazon page and not on this one.