Multiple rads serial or parallel?

[2Busy]

I have searched and read and have not found what I was looking for. So, on with the question. I have a large enough case that I can put 2 fedco 2-342 in this monster and have room left over. My intent is to stack them on top of each other and connect them in series. My pump is a Mag3, and I will be running the Swifech 6002a cpu block, and I have not yet decided on the gpu block for my 5700. I am not aiming so much for my best overclock as I am for silence. My uneducated thought was that with more frontal area for air flow, I can reduce my fan speed to near silence while still maintaining ample air flow to cool the beast. Can someone tell me if my theory is wrong?

Thanks guys. This forum has to be the best place on the net for what I consider to be solid information. I read here daily just to learn.

2Busy

[Etacovda]

In series, i take it you're talking about air flow (you said stacking)

Its best to go in parallel - your second rad would be effectively useless, as the first rad will heat up the air, reducing the effectiveness drastically.


'plumb in series, airflow in parallel'

[2Busy]

Originally Posted by Etacovda

In series, i take it you're talking about air flow (you said stacking)

Its best to go in parallel - your second rad would be effectively useless, as the first rad will heat up the air, reducing the effectiveness drastically.


'plumb in series, airflow in parallel'

My bad. Stacking as in one sits on the bottom of the case, the second sits on top of it vertically. Like so

----
IIII---------------------from cpu
IIII upper core
IIII-----> to lower core
----
----
IIII<----from upper core
IIII lower core
IIII------> to pump intake
----

With this configuration I can run 4 120mm fans, and my thought was to reduce
fan speed to lower noise while still maintaining air flow per surface area of core equal to that of a similar setup with 1 core and 2 fans.

[black_dante]

i would guess that you should have the fans sucking air from outside the case on both rads so that they are not using heated air. Dont have the airflow in series

and by the way,
what case are you using?

[redleader]

You should plumb rads in parallel too. Less flow restriction.

Edit: THough it doesn't really matter.

[2Busy]

Originally Posted by black_dante

i would guess that you should have the fans sucking air from outside the case on both rads so that they are not using heated air. Dont have the airflow in series

and by the way,
what case are you using?

Its an IBM Server case, model Model S704 I believe.
Here is a pic or two

Front View
Front Opened up

In the second pic you can see where the scsi drives were on the right side. This area is now going to be the home of the 2 cores. I have already cut that plate out to accept 4 120mm fans.

[black_dante]

damn thats one huge case

[2Busy]

Originally Posted by 2Busy

Its an IBM Server case, model Model S704 I believe.
Here is a pic or two

Front View
Front Opened up

In the second pic you can see where the scsi drives were on the right side. This area is now going to be the home of the 2 cores. I have already cut that plate out to accept 4 120mm fans.

Yeah, just imagine a full tower but twice as wide. Room to spare for lots of things. I have another IBM server case I got ahold of as well. It is a cube, measures about 18H x 18W x 25D or so. I am trying to find anyone that may be interested in it for sale or trade for hardware.