4 Port PCI Express Switch Multiplier PCI-E X1 To 4PCI-E X16 Expansion Kit  HUB 6Pin Sata USB Riser Card for BTC Miner Mining 0.6m Product parameters product code& 65306;BG681K Power Connector: usb 3.0 power cable Mainboard size:(L*W*H)9.70*6.30*1.30cm/3.82 inch*2.48 inch*0.51 inch PCI-E Card size:(L*W*H)11.90*6.60*1.90cm/4.69 inch*2.60 inch*0.75 inch USB cable length 0.6m/1.8ft Colour: blue Material: plastic Product Description If you need more than one PCI-E x1 slot on the motherboard was not any so much, it touches you can think about it. It consists of two parts, one main card, interface installed via PCI-E X1 on the motherboard, two equipment cards, both of which are connected together via USB 3.0 cable. The device card also uses the United States Pericom Pericom PI7C9X bridge chip, for switching PCI-E, PCI-E between. But even USB 3.0, but also the theoretical bandwidth 5Gbps (625MB / s), one Into four Then remove the loss would only 150MB / s, and even PCI-E 1.x single-channel bandwidth also has 250MB / s, So this stuff more than enough to give you the best slots, there will not be enough bandwidth, not only for the performance requirements of the place. Therefore, the transferred PCI-E slot is the best version above 2.0, the 3.0 version is better. Several Divided PCI-E 1X slot all is gen2 mode, even if gen1 previously ,it can be ok