Most interesting of these three motherboards MSI 990FXA-GD80, is equipped with four slots PCI express x16, with two slots PCI express x1 and with one PCI, four ports USB 3.0, ten USB 2.0 and six ports SATA 6 Gbit/s. Besides this it support RAID in configurations 0/1/5/10.
MSI 990FXA-GD65, in contrast to the elder models, is equipped only with two slots PCI express x16. The number of USB 3.0 ports is also reduced to two , but the differences between of 990FXA-GD80 and MSI 990FXA-GD65 conclude on this.
Well and the simplest motherboard, is equipped with two slots PCI express x16, which divide between 16 lines and two slots PCI express x1 and PCI .