Soldato
- Joined
- 1 May 2013
- Posts
- 9,971
- Location
- M28
As title?
This is a very confusing matter, you haven't really explained it very well at all, or the motherboard you are using? If by ATX 12V you mean CPU power, then you will most likely need to fill all of them, but the only boards I know of that use more than 2x4 pin CPU power are dual CPU boards.
Just the 8 pin. The other is to supply extra power for the likes of running silly volts with LN2 cooling.