The ram voltage should be listed in the bios under "hardware monitor" or possibly in another section titled "advanced chipset settings" etc. Just press the "del" key while posting to enter the bios. And be careful not to experiment with too many settings, or your system won't post. Then you'll have to reset the bios by removing the motherboard battery with the system off.
I checked the hardware monitor and didn't see the memory Voltage so in a couple of hours when I go to lunch I will check advanced chipset settings and see if it will tell me. What my memory is running at thanks.