2 layer PCB bard designing. Compliant with PCI express 2.0, 1.1 Specification. 1-slot PCI-E 1X to 4 slot 1X riser card with high speed USB 3.0 cable. High speed USB 3.0 shield cable is flexible for 1U,2U,3U chassis. Support 4 port high speed PCIe 1X card.6. Solid capacitor provide extra stable power supply for PCI-e card. Instructions: If you need more than one PCI-E x1 slot on the motherboard was not any so much, it contact 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 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), 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 slots, there will not be enough bandwidth, not only for the performance requirements of the place. Therefore, the transferred PCI-E slot is the 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. Item type: PCI-E X1 to 4PCI-E X16 Expansion Kit Product interface: PCI-E 1X PCI-E 1X Card size:11.9x6.6x1.9cm Cable length: 60cm Supported system: Compatible for Linux /all systems Colour: blue Material: composite material Size: 9.7x6.3cm Package Contents: 1 * 1 to 4 Mining Board Adapter 1 * PCI-E 1X Riser Card 1 * USB 3.0 Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.