Hi Rossy87......
is this the first time you have ever checked your GPU temp..??, 75c is hot, not as a load temp, but idling that's insanely high....
d/l this app
GPUZ & check the temps with this to confirm speedfan is reading correctly..
i'd use ''EVGA precision'' or ''Rivatuner'' to whack the GPU fan to 100%, you will also need to remove the card & clean it out, the HSF could be clogged with dust, or air flow within your case (i.e. fan config) needs serious attention...
cable management will also play a huge part in case temps, if its like a spaghetti junction in there then its gonna get hot......
let us know once you have confirmed the temps.....
SK