Few questions regarding ram on first build

Hmm...No if you only want them to run at DDR3 1333 MHz then use DRAM Voltage -> 1.50v, but IF you want to run them at DDR3 1600 MHz then Yes DRAM Voltage -> 1.65v.

RAM: 1600 MHz 9-9-9-27-2T @ 1.65v
RAM: 1333 MHz 9-9-9-27-2T @ 1.50v

BIOS:
Set Memory Clock -> 8 {8 x 200MHz FSB = 1600 MHz}
DRAM Voltage control -> 1.65v
DDR3 Timing Items -> Manual/Enter
* 1T/2T Command Timing -> 2 ; optional
CAS# latency -> 9
RAS to CAS R/W Delay -> 9
Row Precharge Time -> 9
Minimum RAS Active Time -> 27

Save Exit = Yes