MOTHER ASUS (AM4) PRIME B550M-A AC CPU: AMD AM4 Socket for AMD Ryzen Memory: 4 x DIMM, Max. 128GB, DDR4 Bluetooth: Bluetooth® 5.0 Form Factor: mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm ) Accessories: I/O Shield 2 x SATA 6Gb/s cable(s) 1 x Supporting DVD User manual 1 x Wi-Fi moving Antenna 1 x M.2 S Chipset: AMD B550 LAN:Realtek RTL8111H 1Gb Ethernet Wireless Data Network : Wi-Fi 802.11 a/b/g/n/ac Audio: ealtek ALC887/897 7.1 Surround Sound High Definition Audio CODEC