no you wont, worst thing that can happen is a few BSODs.
voltages really depends on the chip itself, some chips might need very little voltage for a high overclock, some need a fair bit amount of voltage to get a mild overclock.
and by few years, do you mean the durability of the board or the need to upgrade it?
voltages really depends on the chip itself, some chips might need very little voltage for a high overclock, some need a fair bit amount of voltage to get a mild overclock.
and by few years, do you mean the durability of the board or the need to upgrade it?