Critique my cooling design

[dsiglin]

Hey guys, I'm in the throes of a G5 Powermac modification (my first case mod ever) and let's just say I'm having to be very creative to achieve the look I want. So I have come up with a cooling solution but I am not very familiar with cooling theory and would love some feedback. I'm attaching a file that shows the actual computer (with paper mockups of components and next to it an illustration that shows more clearly what I have in mind. I realize the location of components is strange but there is a method to my madness. Thanks in advance and please feel free to ask any question.

 

[rehpotsirhc]

The GPU fans will be on the top of the card since the motherboard is mounted upside down in a G5 case, I don't think it will make a difference though.

 

[dsiglin]

Correct, normally they would. I purchased a PCIE riser cable which will let me flip the card the other way. Alternatively I might end up watercooling the GPU and not the CPU. That would let me keep the card the right way without worrying about air flow competition from the PSU.