make sure you use the same program to check GPU temps that you used before.
Also note, not sure where you live but its gotten a lot colder where I am recently. It's possible your ambient temps are also lower.
A lot of people on here will hate on corsair PSU's but I think they are pretty solid for a medium quality PSU aimed at gaming configs.
Also, not really sure what corsair link does with a PSU. I have it but I use it to control the fans on my corsair heatsink.
i7 7700kK @4.2ghz
16GB DDR4 3200mhz
GeForce 1080 Ti