Mine is 45-47 under load. Ignore my sig, I'm on DFI now not ASUS and I'm too lazy to change it right now. Anyway, I'm still playing with settings, but I'm at 2880mhz right now. I have a few 120mm case fans that keep the air moving in my case.
My PWMIC gets crazy hot, though. I'm nice and stable- but it gets to 65C-70C with 2 instances of Prime95 going! This is while my cpu is 43C and chipset is 45C. I was worried, but folks on different boards are saying not to worry about the pwmic- that it just gets hot and doesn't hurt anything (unless you get over 100C or something crazy). The fact that there is no heatsink on it shows that it isn't much of a concern.
I wouldn't worry too much about the chipset temp.