Oh ok, I got my unit all messed up (like always), that explain a lot.
As for my card, I could have bought better, but it is a overclocked version from asus that until here, has been able to run any game at full capacity, with ENB's and Sweet FX and ambient occlusion and all at something like 60fps ~easily. So it could be far worse, but could be better yeah.
Skyrim, and the Last hitman and Tombraider are good exemples.

And I'll look into the suspicious tasks, I hadn't noticed them ! I'm also doing a full reinstall of my drivers, if that doesn't help I'll format, I had planned to do it anyway, its been a good three years since the last time.
Thank you all for your answers

Edit: My card is not hot, not that much, last time I checked it was something like... 49° while playing. As for the overclock it is quite stable, always been until here and I haven't mess with anything that I didn't know (except for my silly task manager, i'd say)