The PCI-E slot is 1x and also support 4x/8x/16x. ^^ It has four SATA 3.0 interfaces, which can be connected to an SSD solid state hard disk as a system disk, and supports transmission rates of 6.0G bps, 3.0G bps, 1.5G bps. ^^ With hot swap and hot plug capabilities, and power management functions; ^^ Supoort SATA NGFF Key B+M SSD with 2230/2242/2260/2280. ^^ It has PCI-E 1x interfaces, which can be connected to four SSDs, and supports desktop motherboard PCI-E port.