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480GTX alignment

post #1 of 15
Thread Starter 
OK ... maybe this has been touched on already somewhere else and I haven't seen it, so I'll run it past you all here.

The 480GTX is a dual pass radiator with the flow covering half the depth of the full length of the radiator on the first pass down the rad, while the second pass coming back is in fact flowing through the other half of the rad.

So, akin to the stacked heater core theory, shouldn't the first pass of your radiator actually be the pass that is furthest from the coolest air ( pulling fan side ) and the second pass would in fact be the closest to the coolest air ( pushing fan side ).

Wouldn't this setup get you another C or 2 in cooling ?
post #2 of 15
hmmm do you mean vertically? i always thought the GTX was in 2 compartments, like the water passed through the rad channels in a "C" shape,looking at it from the top.On end of the C being the intake, and the other the output, with the intake taking half the slim channels the water passes through to take away the heat, and the other half the output.

Is that what your saying Joe?
As i unterstood by what you said, is if you put the rad horizontal, it would make a "C" shape flow as well, so the rad is split into 2, but horizontally.....
Hmmmm if thats the case, then i get what you mean.
And yes it should get you some better temps.....
but are you sure its not like the 1st "C" shap i explained?
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post #3 of 15
I wondered about that to Joe...Then it made my head hurt so I just did a push-pull on mine instead of my normal pull....
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post #4 of 15
Thread Starter 
OK ... here's an image I modified so you can see the flow pattern of a 480GTX.



As you can see ... the top barb inlet goes to a channel that flows only across the back half of the rad ... swings around to the front half at the other end ... then exits out the lower barb outlet.

Dual pass. So, assuming that flow pattern, the top fans should be pulling and the lower fans should be pushing in order to get the maximum amount of cooling from this rad.

That way, the coolest airflow is hitting a "pre-cooled" flow of water that has already been through the back half of the rad. If the waterflow were reversed ... in the bottom and out the top barbs ... the warmest water would be getting the coolest air on the bottom half, but the semi-cooled water would then be getting warmer air "attempting" to cool it further on the top half.

Make sense yet ... or am I blabbering ?
post #5 of 15
I see what your saying Joe...I don't know if it would make any measurable difference though...If your fans are sealed to the rad it will have even flow across all the fins anyway....I could very well be wrong though...There is only one way to know for sure, try it in both configs and see....
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post #6 of 15
Thread Starter 
I guess I'm looking at it as though I had two separate radiators I wanted to run in a stacked configuration.

In order to get the maximum amount of cooling in respect to my cooling fans, I would need to run the water through the outermost radiator first, then the innermost. Same air flow, yes, but warmer air hitting the outermost radiator since it has already passed through the innermost radiator first.
post #7 of 15
Quote:
Originally Posted by CrazyJoe View Post
I guess I'm looking at it as though I had two separate radiators I wanted to run in a stacked configuration.

In order to get the maximum amount of cooling in respect to my cooling fans, I would need to run the water through the outermost radiator first, then the innermost. Same air flow, yes, but warmer air hitting the outermost radiator since it has already passed through the innermost radiator first.
Hey it might make a difference I don't know just try it and see....You will need to figure out which barb is front and which is back....I know if you put shrouds on it and push-pull you will drop a couple of C....
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post #8 of 15
Thread Starter 
Yep, I already looked inside the barb inlets to see which was front and which was back ... While looking at the rad in a vertical position with the barbs at the top facing me ... left is the back half, right is the front.

They'll all be sealed with about an inch of clearance between fans and both sides of the rad. My external box is coming along nicely now. Been working on modding my extra 430W enermax to power everything.
post #9 of 15
Quote:
Originally Posted by CrazyJoe View Post
Yep, I already looked inside the barb inlets to see which was front and which was back ... While looking at the rad in a vertical position with the barbs at the top facing me ... left is the back half, right is the front.

They'll all be sealed with about an inch of clearance between fans and both sides of the rad. My external box is coming along nicely now. Been working on modding my extra 430W enermax to power everything.
Hey if you try it both ways let us know if there is a difference...I like to use seperate PSU's for my pumps and rad-fans to...Hey it cant hurt to take some of the load off the comp psu...I have some of the little Xp 130W board type I made enclosures for 1 is for rad-fans and 1 is for the pumps....

Sounds like its coming together for you...Fun ain't it....
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post #10 of 15
Ira, can you run a test for me in your spare time? Mount your fans using HWLabs' fan mounts, and then a test with your custom shroud on it. I want to see if spacing fans out is all it's cracked up to be...
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