before someone mentions the aftermarket 9800gx2 cooling issue is there a way around it so that you dont have to put up with either the horrible stock cooler or an expensive aftermarket block
pictures explain it far better then words would
Two normal water blocks will fit fine. The only reason this looks odd is that he didnt have two graphics card water blocks so he had to custom mount the top block
With that being said given present prices I would go for the 9800gx2 if you do the mod shown above, and this is from a 4870 owner. The only reason I have a 4870 is that I got it for sub $200