Originally Posted by sinnedone
Thank both of you.
So basically I just need to fit as much rad space as possible with the least amount of bends especially 90's. Hey this is sort of like planning the intercooler tubing on one of my project cars lol
How about this, running the tubing in parallel with both gpus? What would happen if the parallel tubing included 2 gpus and cpu?
People run GPUs in parallel all the time...in fact it is becoming the more popular thing to do. the most common and best looking way to do this is to connect the inlets and outlets between the cards with either the Bitspower Crystal Links or one of the many SLI connectors.
The key points between the two setups:
Series you usually have each subsequent card hotter than the first (say 48, 50, 52 for 3 cards) vs Parallel where all cards are roughly the same temp (51,51,51 for 3 cards)
Parallel is less restriction in the loop than series
Parallel has slower flow over each cards (flow is roughly 1/N cards) than Series
Now in terms of running parallel to the CPU as well, then you need to make sure your pump will be able to crank out enough flow that your blocks have water moving fast enough. CPU blocks tend to have a lot more restriction, so your GPUs will definitely not get as much water.
For example, let's say a CPU block is 2x the restriction of the GPUs.
then roughly 1/2 the flow would go to CPU, 1/4 over each of the GPUs.
Continuing this example, if your pump is only getting you 1 Gal/m, then you probably are not going to cool your components enough. if it was like 2 Gal/m, then you probably would be ok.
Each block has different restrictions, so you would need to do some research as to how much restriction you have and look at some pressure curves to see what kind of flow your pump will produce for your setup.
I personally recommend doing everything in series, save the two GPUs can be in parallel.Edited by cyphon - 1/10/14 at 1:38pm