Ahhh! Master/Slave issues, those were the days!
I am not a hard core gamer (even though I have a PS3 with the Sony 24" 3D display) so I seldom bother OCing ram, just the CPU if I decide to play around. I am building a new system right now and have all parts except the CPU. I am waiting to see if the Intel i7 3930k goes down in price around the New Year.
Since I bought an Asus Rampage IV Extreme, I can play around without much concern as it has shutdown safety features.
I perhaps should not have spent the money, but since I have a white/black scheme on all parts, I bought 32GB (4x8gb) of Corsair Dominator Platinum 2400 mhz.
I am going to use the system more for Photoshop work and other rendering than gaming and will probably leave the ram setting alone. The kit is 1.65v. With this board, I can change the BIOS settings without booting the system, so the voltage is not an issue.
But I have in the past, run into a new system not initially booting with the wrong voltage setting.