Mini 6 Pin port connects to motherboard ( NOTE: it is Mini 6 pin, not standard 6 pin.),15 Pin SATA port connects to hard drive; Connector A: ATX 12V mini 6 pin (NOTE: not standard 6 pin), Connector B: 2x Right-angle SATA 15 pin, please note that the sata port is right-angle (compatible with the equipment with sata port such as: liquid CPU cooler, mechanical hhd and a ssd); Compatible with DELL Inspiron series such as: 3653 3650 3655 3250 3252 3268 3660 3667 3668 3670 V3668;(NOTE: Do not support: DELL OptiPlex series such as 3020 3046 5040 7020 7040 9020 SFF T1700.);