Hi, A month ago I bought the rx 580 4gb nitro+ graphics card and I connected it externally to my laptop- Lenovo y700-15isk with the exp gdc adapter. There are 2 cables that connected to the exp gdc, one cable is HDMI to ngff. And the other one is ATX PSU power cable that contains the motherboard cable and the CPU cable that connected to the power supply 650W. I have connected to the GPU an extra supplementary from the power supply. I don't think that anything went wrong , but I have low FPS in games... I did benchmarking test and it showed good results.. I tried to turn on FreeSync and it didn't help.. I will be so thankful if someone will be able to solve my problem..