Features: 100% brand new and high quality High quality board is adopted, which is resistant to high temperature and cold, and does not deform after long-term use, so as to maintain stability for a long time. Gold precipitation process is adopted, which has good conductivity and oxygen resistance, ensures good contact and improves data transmission rate. USB devices are not supported, and multi device extensions are supported. Only one cable is required for the slot, and the installation is simple and convenient. PCI-E slot power supply solution, no additional power cord is required. Package Includes: 1 x PCIE X4 1 to 6 Graphics Expansion Card Specifications: Material:PCB Size of Board:11.5x8.3cm/4.53x3.27inches Length:12cm/4.72inches Working Environment: 0 - 70 Applicable System: Windows Xp / 7 / 8 / 10 Slot Used: PCI-E X4 / X8 / X16 note: Please allow 0-3mm errors due to manual measurement, make sure that you do not mind before you order.