question

[Wakeboardin_411]

i'm gonna be running 2loops into 1 res. 1 cpu 1 gpu i figuer i got massive active cooling on the cpu loop do i need active for gpu? Even after it passes thur the passive cooling b4 it enters the gpu block. And the same water isn't being reused after it goes thur once it goes into a res

[chunkeymunkey25]

We might understand what you have right now better with a pic or two, but from what I understand, if your cpu is getting cooled plenty, and the exit from the cpu block is going to the reservoir & then to the gpu loop, then it seems like you wouldnt need another radiator/HC.

[JoT]

Why not just run one big loop?

[Wakeboardin_411]

because that'd be dumping the heat from my cpu onto my gpu
pump-->hc-->cpu-->res
pump-->hc-->gpu-->res

cpu loop has 4 delta's on it

[JoT]

You're already mixing the water of the two together, and if the CPU is cooled by as much "massive active cooling" as you say, then there should be that much CPU heat, should there?

[voigts]

You will find many on these forums that will tell you that there is very little difference in a loop as far as temps go, maybe in the order of 1-2c. So "dumping" your heat from your CPU into your GPU really won't make much of a difference. You would probably gain more from having one big efficiently routed unrestrictive loop with one good heatercore or rad with fans with good pressure (preferably 120x38mm ex. Deltas at excess-solutions for $5 ea with grill). Having multiple rads with multiple loops only complicates things. Simple as far as loops go is usually the best.

[thorilan]

if you only have 1 rad then run it in series though technicaly you can run your secondary loop without the rad but over long term use you will notice a higher equilibrium

[Wakeboardin_411]

alrite, the simple awnser is always the right awnser