Hi guys I am new to watercooling. I am setting up a watercooling setup to cool my XP2500+ & Abit NF7-S with a maze4 cpu block & z-chip n/b block from dangerden(I know the RBX is newer but can't get that in my country). How much lower temperatures will dual black ice extreme radiators give than a single one? I am deciding whether to get a GPU block to cool my GPU(R9800Pro) or a second radiator. All the waterblocks would be in one closed loop. Will using dual 120mm fans on the radiator help? I hope to use one to bring in cold air and another to pull the warmed air away. Yes, I would not be using a reservoir but a T setup will that be good? What the elbow & straight fittings about anyway? Before you guys ask, yes, I have done some reading up.