MSI 990XA-GD55. Supported memory types: DDR3-SDRAM, Memory channels support: dual, Supported memory clock speeds: 800, 1066, 1333, 1600, 1866, 2133 MHz. Processor family: AMD, Processor socket: Socket AM3, Processors compatible: Athlon II X2, Athlon II X3, Athlon II X4, Phenom II X2, Phenom II X3, Phenom II X4, Phenom II X6. Audio system: Realtek ALC892, Audio output channels: 7.1. PCI Express slots version: 2.0. Width: 305 mm, Depth: 244 mm