MSI X99A GAMING PRO CARBON Desktop Motherboard - Intel X99 Chipset - Socket LGA 2011-v3 Number of Memory Slots: 8 PCI Express x16: 4 x PCI Express x16 Max LAN Speed: Yes CPU Type: Core i7 Maximum Memory Supported: 128GB Audio Channels: 7.1 Channels USB 1.1/2.0: 10 x USB 2.0 Dimensions (W x L): Depth:9.6 Width:12