1.76V?!?! Are you sure that is your CPU's voltage and not the CPU PLL voltage? If it is your CPU's voltage, that is absolutely unsafe.
The only way to know if your can hit 4.7 GHz is to try. Every chip is different.
65C is not toasty, that is very good. Are you running the Small FFTs test? And is 65C the core temp or the package temp?