ASUS Crosshair IV Formula, AMD, Socket AM3, AMD Phenom, DDR3-SDRAM, 16 GB, DIMM ASUS Crosshair IV Formula. Processor manufacturer: AMD, Processor socket: Socket AM3, Compatible processor series: AMD Phenom. Supported memory types: DDR3-SDRAM, Maximum internal memory: 16 GB, Memory slots type: DIMM. Supported storage drive interfaces: SATA II, SATA III, RAID levels: 0, 1, 5, 10. LAN controller: Marvell 88E8059. Component for: PC, Motherboard form factor: ATX, Motherboard chipset family: AMD