Enhanced PCIe Expansion: This adapter riser card provides a seamless solution to expand your PCIe connectivity. Transform one PCIe 3.0 4.0 X16 slot into two SFF-8654 8i ports, allowing you to connect multiple devices simultaneously. High-Speed Data Transfer: With PCIe 3.0 4.0 X16 compatibility, experience -fast data transfer rates for your connected devices. Enjoy optimized performance for tasks such as data-intensive work, graphics rendering, and multimedia tasks. Versatile Integration: The 2-port SFF-8654 8i Adapter Riser Card offers efficient integration with devices and systems. Whether you're upgrading an existing setup or building a new one, this card ensures streamlined connectivity and enhanced system flexibility. This product is not plug and play! The machine needs to support PCIe x16 slots split into 4 x4 to use, BIOS settings are complicated, our store does not provide technical support, because each computer settings are different, can not unify the tutorial! Do not buy blindly, otherwise it may not be available! Note: Only support using SFF-8654 8i to SFF-8639 (U.2) data cable to insert the SFF-8654 8i interface of this product, and connect to U.2 or U.3 hard disk. Product Features: Supports installation of 4 U.2 SFF-8639 hard drives using data cables. The hard disk signal cable goes straight through the PCIe slot of the machine, no chip conversion, unlimited hard disk performance. Points to note before purchasing: Confirm that the motherboard PCIe x16 slot supports PCIe signal splitting, please consult the official customer service of the motherboard, do not support please do not buy! When setting , use two hard disks of the same specification and model, support is determined by the motherboard, regardless of the riser card. Only specific cable U.2 SFF-8639 SSDs are supported, SAS hard drives and SATA hard disks are not supported. Other purchase instructions: Note that the motherboard PCIe slot bandwidth sharing and binary selection, please refer to the motherboard manual for details. Most motherboards must work with the CPU, low-end CPUs may not support splitting due to PCIe count limitations. Color: Black Material: PC, Metal Package Contents: 1* U.2 PCI-e Adapter(Due to different product batches, the appearance may be different, which does not affect use.) 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.