I am looking at warter cooling for my four graphics cards

one of them is an asus 5770 (This needs the cooling bad as its running in the 80s underclocked!

Two cards are ati radeon hd 6970 it would be nice to have the them Wc'd

and then my tower that is my main system uses an radeon hd 6870 form ati

so what am I looking at as I"m quite new to the whole bit mining and graphics card sceen  as im not a big pc gamer and such.