My computer is acting strange

[Sean Powley]

Hello, my computer is having problems in terms of running games, a few weeks ago my computer with a gtx 970 was able to run league of legends at 200-180 consistent fps, however recently I installed a gtx 1080 and some new dominator platiums (32 gb of ram) 2 sticks for 16 gb and now my computer can only run league at around 110-90 fps even when I switched all the old parts back in. Also my cpu fan is connected by only 2-3 of the slots so its a tiny bit loose but idk if that would cause anything please help : ^ ).

My specs https://pcpartpicker.com/list/

 

[Supahos]

If I was a betting man I'd say your CPU is now overheating and slowing down now due to the cooler being loose... It has to all be tight to work properly