Features: Blistering Transfer Speeds, Doubled Efficiency: Equipped with the ASM3242 controller chip, it achieves a theoretical transfer rate of up to 20Gbps. In practical testing, the USB C delivers transfer speeds exceeding 1700MB/s. Features 15pin auxiliary power design, eliminating the need for external power sources. Plug-and-play functionality with sustained, stable power delivery. Compatibles PCIex4x8x16 slots. Not needt additional driver ; automatically recognised upon insertion into the motherboard. Incorporates thickened gold-plated contacts to enhancing stability with motherboard slots and reduce the risk of contact failure. Versatile adaptability for diverse scenarios. Provides stable, high-speed connectivity support for various devices, enabling flexible expansion and convenient usage. Specifications: Component: PCB Chip： ASM3242 Size: about 80X57X120mm/3.15x2.24x4.7in Input : PCIEX4X8X16 Space: USB3.2 GEN2x2 20G Package Includes: 1PC PCIe to USB3 TYPE E Expansion card note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.