Originally Posted by PhillyB
You would get the best performance by having both rads as intake from the outside of the case and then have the back of the case be exhaust. Having one rad blow hot air into another rad sorta defeats the point in my mind.
Age old debate - running both rads as intakes with limited exhaust also can turn the inside of the case into a convection oven, and can also add restriction to the rads impeding their performance. In that case, you wind up with temps on all of your other components far too high, and in some cases the loop components temps are higher.
Personally, I am a strong advocate of trying it both ways and seeing which is holistically
better. All intake may drop your CPU temps two degrees, and wind up raising your VRM temps to the point you get throttling. You just never know what the overall effects will be until you actually try it both ways.