Asrock 970 Extreme4. Memory channels support: dual, Supported memory clock speeds: 800, 1066, 1333, 1600, 1800, 1866, 2133 MHz, Maximum internal memory: 32 GB. Processor family: AMD, Compatible processor series: Athlon II X2, Athlon II X3, Athlon II X4, Phenom II X2, Phenom II X4, Phenom II X6, Processor socket: Socket AM3. Audio output channels: 7.1, Audio system: HD. PCI Express slots version: 2.0. Width: 305 mm, Depth: 244 mm