You can turn up the fan speed manually in CCC for your HD7770, on hot days I run mine at 70% and it stays below 58c while I play Crysis2. As far as the case goes I need to know make and model of the case, and the fans that are installed. Should be able to find a solution for your hot cpu.
Just a quick thought, i have a gpu monitor gadget for win7, it shows my memory usage from my gphx card as 0%. same for you??