I have also heard the 703 bios does reduce system performance. I'm running the 613 bios right now with no issues.

The NB heatsink has some nasty crud on it. Your best bet is to clean that crud off(it's very sticky and difficult to get off but with patience it WILL come off). Replace it with some AS5 or Ceramique(I used ceramique)

I did that as well as dremeled the 'T' portion of the heatsink off and mounted a 40mm fan in the center(my scythe infinity overhangs the NB which is the reason i had to use a dremel). In an 80F room my idle NB temps are 30C. Load temps are approx 35C. Never goes above 40C.