ive got the same board and processor and i idle round 33c get up to 67c on Prime95 im currently clocked at 3.8Ghz and i never exceed 1.4v on full load
in your Overclocking menu in BIOS settings you will find the CPU voltage setting its true you cant adjust the voltages specifically to what you want but you can specify that you dont want it to exceed a particular voltage
set the voltage setting to not exceed 1.0000v
i know that sounds low but trust me it works the board will still exceed the specified voltage but only a little bit hence the
I haven't, only reason I bought it is because my other mobo broke which cost me a ton, the PCI Express slot just stopped working. I'll most likely RMA that board and toss this one on ebay or get a refund if the RMA comes back quick.