Well i got PWM temps down by 10celcius by remounting it, but NB just keaps going at 60-62 celcius at load.
I havent upped any voltages in NB so it should stay much lower, hot NB is heating up also cpu cooler litlebit but it can handle that heat due its NH-D14.
Guess its normal to have 60+ celcius in NB and 70+ celcius in PWM at 4ghz+ with full load, after all cpu is eating 140+ watts of power with overclock.
Another thing why it maybe is running hot is due indoor temperatures of 25-30 celcius in summer.
EDIT : Gigabyte send me new bios F3b Beta. If someone wants it just pm me and ill send it soon as i can.