Features: brand new and high quality Device card is used to transfer between PCI-E and PCI-E.Easy installation, fully plug and for play, convenient and efficient. Customized for mining BTC. Support 4 port high speed PCIe 1X card. Solid capacitor provide for extra stable power supply for PCI-e card If you need multiple PCI-E x1 slots, it consists of two parts, one is the main card, which is installed on the motherboard through the PCI-E x1 interface, and the other is the device card, which has three or four PCI-E x1, and both pass through Connect the USB 3.0 cables together. Theoretically with USB 3.0, the bandwidth is no more than 5Gbps (625MB/s). If you divide it into four , it will only be around 150MB/s for m. PCI-E 1.x has a single channel bandwidth of 250MB/s, for you with enough slots, but not enough bandwidth, are only suitable for places where performance is not required. Therefore, the PCI-E slot to be transferred is preferably version 2.0 or higher, and version 3.0 is better. The PCI-E 1X slots that are separated are all in gen2 mode, even if they were in gen1 before. This is a very nice feature. Specifications: Product name: PCI-E 1 to 4 Riser Card Product interface: PCI-E 1X Color: Blue Data transfer speed: 5Gbps(theoretical) Onboard interface: 1x USB3.0 Type-A, 4x 4Pin power port, 4x4 PCI-E X16 slot System requirement: for Windows/Linux/for Mac Expander board size:Mixed(Pls See the Pictures) Package Includes: 1 x PCI-E 1 to 4 Riser Card Kit note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. We will test it before shipment, but computer compatibility problems are very common. There are customer feedbacks that the adapter card plus 1X to 16X and then the graphics card cannot be recognized.If the return is not the quality problem, the round-trip postage needs to be borne by yourself, thank you for your cooperation