I have a Coolermaster RS-500-PCAR-13 PSU and want to install 3rd party Chinese-brand GTX1080 (https://item.jd.com/20045775699.html). However it seems my PSU does not have an 8 pin connector that should be required to connect the GPU - I can only see three 4 pin connectors. Do I need a new PSU for this? Any help appreciated.
Photos of the GPU/manual and the inside of my machine: https://imgur.com/a/gbEpskt
Photos of the GPU/manual and the inside of my machine: https://imgur.com/a/gbEpskt