6 PIN to 8(6+2) PIN: One end is standard 6 Pin male port, the other end is 8(6+2) Pin male port. PCI EXPRESS POWER CABLE: Standard 6 Pin port connecting to PSU, the other 8(6+2) Pin port connecting to GPUs. ONLY PSUs with 6 PIN PORT: ONLY compatible with CoolerMaster and Thermaltake PSUs with 6 Pin port, NOT compatible with EVGA, Corsair an Antec PSUs, Please check your PSU before buying it. ONLY GRAPHICS CARDS: Designed for graphics cards, it doesn't work with motherboards. 6 PIN & 8 PIN GRAPHICS CARDS: Compatible with 6 Pin & 8 Pin graphics cards from popular manufacturers from ASUS, ASRock, Radeon, Sapphire, and Gigabyte.