also why an h77 mobo?
H61 is older and won't support newer processors should you decide to upgrade.
The second build doesnt have a raidmax power supply. the voltage of the ram should be 1.5V?
I always try to warn people against purchasing poorly made power supplies - the Corsair is decent but get the CX500.
Yes the voltage of the RAM should definitely be 1.5V - no more no less.