First and foremost, please flash ur bios with the latest version. The risk of unsuccessful bios flashing is extremely small.....but better use a UPS if u have one, and don;t run anything else while attempting to flash.
Second, please check ur voltages under full CPU load
. The normal voltage ranges for C2 and C3 stepping denebs are as follows.
C2: 0.850 - 1.425 volts
C3: 0.9 - 1.400 volts
U can identify the stepping in CPU-z itself, check under Revison if its RB-C2 or RB-C3
If the voltages are within this range, then u are absolutely safe. So stop worrying, and have fun
PS:- I think u have a C2, and ur mobo is rounding off 1.425 to 1.43 volts @3.2GHz while displaying. So 99.9% its perfectly normal.....even if its not, 0.005 volts extra is seriously not something to worry about