I didn't change any drivers or anything recently, is anyone experiencing similar problems?--
P.S. when diablo 3 is unplayable, my activity says only 10% of the CPU is being used with some 5-6 gigs of ram still available; is this a software based issue?
UPDATE: Upon further research on the forum I've found that resetting my SMP (?) has fixed the problem, for other users experiencing similar symptoms, force quit any non-responding programs then press the left side --shift + control + alt/option and power buttons at the same time, releasing them at the same time. This will shutdown the computer, reactivate with the power button--- and tadaaaa my FPS is fixed :D