[KlevrPhelo]

My current setup is:

Pump -> Rad -> CPU1 -> CPU2 -> Res -> Pump

I figured that's the best for cooling, since the rad is supposed to cool down the water, and you want the water going to your CPU's to be as cold as possible. Seeing as the pump adds some (but not much) heat to the cooling solution you'd want it "cooled down" before it touches your CPU's.

You might want to consider splitting the flow from the Rad to each CPU, then joining the flow again before it hits your res. I myself haven't tried it, but I've seen it done and it's even been suggested by some people too. I think it might cause some problems with flow.. but if done correctly it might not. Then again, I could be wrong.

Just a thought...