Features: This product is SFF-8654 8i to PCIe x16 interfaces, and actually it can only go to PCIe x8 that is, PCIe x8 in PCIe x16. This product supports PCIe 4.0 and is compatible with PCIe 3.0 and PCIe 2.0 products. This product SFF-8654 interfaces PIN is defined by general If your machine SFF-8654 interfaces PIN is defined as special design, this product is not compatible. This product must be to the SATA 15PIN power interfaces of the chassis power supply. Please solve the technical problems such as the installation of external graphics cards and other equipment driver by yourself, and our store cannot provide technical support; This type of adapter card conversion does not need to be realized by chip, and the product without chip is equivalent to cable function, No driver is required. Color: Black Material: PCB Different batches may cause differences in printing/appearance, which will not affect the use; the actual product may have color differences due to different lighting or display Package Contents: 4 x Extension Card Only the above package content, other products are not included. Note: Light reflection 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.