Re: What if temps start to rise?
Yea, if it is 75c idle that is a bit to high and needs to be cooled off... If the gpu or NB is 75 under a HEAVY load then it is ok IMO. Best thing to do, is clean all fans, and heatsinks off, use a long bristle paint brush to get into deep spots to get the really fine dust out that canned air can't remove easily, probably upgrade the intake/exhaust fans, blast air into the psu to remove some dust....
BTW, IMO, the hard drive temp listed is safe, I have seen some drives hit 60C easily because they are in hotswap bays and still work just fine.