Biostar TA785G3 HD memory (over)voltage? WHAT?!

I recently built a system using:

Motherboard: Biostar TA785G3 HD
Processor: AMD Phenom II X4 955 B.E.
Ram: G.Skill Ripjaws F3-10666CL8D-4GBRM
Graphics: Visiontek ATI Radeon 5770
HD: Western Digital 320 GB Blue
Drive: LG CD/DVD Writer
Power: Corsair 650TX

So far everything is good except for the ram settings. I know there a million posts about how to set ram timings, etc., but I cannot find anything on google or elsewhere about the biostar (ami) bios settings. The manual is incredibly vague about what each setting does. With everything set to auto my ram shows up as 9-9-9-24-1T and 1.584 voltage (TOverclocker Utility shows this). Under bios it says the voltage is 1.608. The ram is rated for 1.5v and 8-8-8-24-2T. I see how to change the timings, but the voltage isn't nearly as clear. In the bios it has a section under manual overclocking labeled Memory Overvoltage with selectable settings. 1.45 and 1.51 are selectable, but not 1.5. Is one of these acceptable? Or should I just leave everything on auto and leave it to the gods to the powers that be to take care of it? Man, I hope someone can help me on here. I'm trusting that someone can. Thanks in advance!