1.2 layer PCB bard design. 2. Complies with PCI express 2.0, 1.1 specifications 3. 1-slot PCI-E 1X to 4-slot 1X riser card with high-speed USB 3.0 cable. 4. High speed USB 3.0 shielded cable is flexible for 1U, 2U, 3U chassis. 5. Support 4-port high-speed PCIe 1X card. A solid capacitor provides an extremely stable power supply for the PCI-e card Instructions: If you need more than one PCI-E x1 slot on the motherboard, there aren't that many, you can there think. It consists of two parts, a main board, an interface installed via PCI-E X1 on the motherboard, two equipment boards, both connected together via a USB 3.0 cable. The device card also uses the United States Pericom Pericom PI7C9X bridge chip, for PCI-E switching, PCI-E between. But even USB 3.0, but also the theoretical bandwidth 5Gbps (625MB/s), one in four then remove the loss would only be 150MB/s, and even the PCI-E 1.xa single-channel bandwidth also 250MB/s, so this stuff more than enough to give you the best locations, there won't be enough bandwidth, not just for the performance requirements of the venue. Therefore, the transferred PCI-E slot is the best version above 2.0, version 3.0 is better. Multiple split PCI-E 1X slots are all in gen2 mode, even if gen1 previously this may be ok. Specifications: 1. Power connector: USB 3.0 power cable 2. Motherboard size: (L*W*H) 9.70*6.30*1.30cm/3.82in*2, 48 inch * 0.51 inch 3.PCI-E Card Size: (L * W * H) 11.90 * 6.60 * 1.90 cm /4.69 inch * 2.60 inch * 0.75 inch 4.USB Cable Length 0.6m/1.8ft Color: Blue Material: Plastic Package Contents: 1 x 1 to 4 Mining Card Adapter 1 x PCI-E 1X Riser Card 1 x USB Cable 3.0 Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The allowable measurement error is +/- 1-3 cm.