Razer Cortex

Yesterday when I opened my PC the razer central was broken and I couldn't open Razer Synapse and Cortex. I tried uninstalling with the instructions from here: How to perform a clean re-installation of Razer Synapse 3 & 2.0 on Windows. When I tried to reinstall the software, the installers...

for a gpu that requires 2x 8pin, and a Seasonic s12ii 620w that only has 1x 8pin and 1x 6pin, can you use just the 8+6 straight without adapter? i know this would mean the gpu getting only 75w on the 6pin so it's ok although in reduced performance mode? if using a 1x 6pin to 8pin adapter...