Memory voltage change

Does anybody know how do I change the memory voltage from 2.2V to 2V?
The new memory I just bought suports 2V

if you have a mainstream board, there should be a menu with at least a few options for voltages and clocks. There will either be a setting with the memory voltage on it, or a setting that will raise it up from the standard voltage.

If you have DDR2 the standard voltage it 1.8 volts, so to get 2 volts you would want +.2V
If you have DDR3 the standard voltage is 1.5 volts, so to get 2 volts you would want +.5V