You should DEFINATELY go for parallel style if your waterblocks aren't dependant on high water flow (ie. waterblocks with jets). I really don't get people who say that you should put the CPU's in series and the GPU's in series, have they skipped physics class? O_o
The higher Delta, the better cooling!
In your case you may have to get two pumps or one that can pump ALOT. Take into considerations that your rig is 2x a normal rig since you have 2x of everything we mortals have, except for the unearthly amount of harddrives ofcourse.
Well anyways, this principle applies to radiators aswell ofcourse. So for OPTIMAL cooling you should parallel the rads, not go gpu->rad1 and cpu->rad2, because if the gpu's generate less heat than the cpu's then the gpu rad can help along to cool the higher wattage emitted by the cpu's. BUT, since the gpu rad is smaller and thus probably less performing than the bigger cpu rad this might get alot more complicated.
So i am kind of clueless as to setting up your rads for best performance. :shrug:
Well anyways, you should go for your parrallel schematics, but i strongly advise you to get two pumps since if the restriction in the cpu blocks is greater than in the gpu ones, the cpu blocks will suffer greatly (and even more if you set them up serially). With two pumps one will manage the gpu-side and the other will manage the cpu's. Since the gpu's are equally restrictive the waterflow will split evenly, likewise on the cpu side.
Oh well, just my 2 cents.
Btw... PHAT ASS RIG!!!!!!
