For those who have a Giant B - or probably those with a Giant X10 since I'm guessing they must be similar - What power supply are you using? 1200v enough? Would I be able to mine on all algos at the same time or is there a limit with what can be mined at any given time?
If you are going to use X11 algo, you will nee 630W, so 800W+ PSU will be enough.
If you won't use X11 algo, you will need max 390W.
1200W is certainly enough.