Watercooling: 2 Radiator question...

[PreOmegaZero]

alright, I have 2 fairlly large radiators and a 120mm-sized one at the moment.
The 120mm radiator is after the pump and before the waterblock [ PUMP --> 120mm RAD --> WB ]
The larger one is after the WB before the pump [ Waterblock -->Big RAD --> PUMP ]

I'm replacing the 120mm one with an identical 2nd large radiator.

The question is, how should I set it up?
My current temps are:
46-48C IDLE, 52C FULL LOAD with NO ACTIVE COOLING
39C IDLE, 43C with 1 120mm fan sucking air away from the radiator.

1) Pump --> Radiator --> Waterblock --> Radiator --> Pump
2) Pump -->Radiator --> Radiator --> Waterblock --> Pump (Serial before the waterblock)
3) Pump --> Radiator 1 --> Waterblock --> Pump (Parallel before the waterblock)
--> Radiator 2 --^

4) Same as #3, but with radiators AFTER the waterblock

 

[Tuff]

You failed to mention what type of waterblock you are using. Also...I would think that one Rad is enough...as I run 1 with a MicroCup Latest Technology in water blocks and I get 32 deg C. 34ish full load. I would be looking at getting a more efficient block first...then mess around with the Rads


Tuff

 

[PreOmegaZero]

My waterblock is in my signature BUT...

Waterblock is a D-tek Spir@l with aluminum top.
Pump is an Ehiem 1250.
Radiator is a custom, 5/8" ID that accomodates about 3 120mm fans across.
Tubing is 5/8" braided tubing from Home Depot (not flexible but does the job).

CPu is an Athlon XP 1700+ running @ 2250Mhz, 166Mhz FSB @ 2V VCore.

 

[HappyCracker]

What if you split the line to go to both radiators? Would that drop the speed or pressure? I was thinking of Bernoulli's principle; Pressure goes down, speed goes up I think it was? It seems to me pressure would drop. I was reading somewhere that the water needs to move somewhat slower so it would have time to contact the surface or something like that. Anyone else have thoughts?

 

[PreOmegaZero]

Originally posted by: HappyCracker
What if you split the line to go to both radiators?

That's what I meant to say with #3, but it came out all funky.

#3 would be: Pump (split to) --> RAD1 & RAD2 (combine line into to 1 again) --> Waterblock --> Pump