Features: This product is SFF-8611 8i (also known as SFF-8612) to PCIe x16 interface, but in reality, it can only connect to PCIeX8, which is PCIeX8 in PCIe x16. This product supports PCIe 4.0 and is compatible with both PCIe3.0 and PCIe2.0 products. This product uses a universal signal definition for the SFF-8611 interface's PIN pin signal. If your machine's SFF-8611 interface PIN pin signal is defined as a special design, this product is not compatible. This product needs to be connected to the 24PIN power supply of the chassis power supply. The S1 that turns on the adapter card is to have the power supply start switching. In principle, the S1 switch should be turned to the OFF position. When your computer starts, the external power supply should also start. If the external power supply cannot start when your computer starts, turn the S1 switch to the ON position. Please resolve any technical issues related to the installation of drivers for external graphics cards or other devices on your own. Our store cannot provide technical support. This type of adapter card conversion does not need to be achieved through chips, and products without chips are equivalent to cables and do not require a driver. Specifications: Size: Mixed Item: SFF-8611 8i（SFF-8612） to PCIE x16 adapter card Supports PCIe 4.0 and compatible PCIe3.0 PCIe 2.0 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 dimension difference due to different manual measurements. Package includes: 1st SFF-8612 to PCIE4.0 adapter card