MSI K9N4 Ultra-F, AMD, Socket AM2, 4 GB, 1.8 V, ATX, ATX MSI K9N4 Ultra-F. Processor manufacturer: AMD, Processor socket: Socket AM2. Maximum internal memory: 4 GB, Memory voltage: 1.8 V. Motherboard form factor: ATX, Power source type: ATX. Width: 304 mm, Depth: 185 mm