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Question about multiple rad Delta T

post #1 of 6
Thread Starter 
Water cooling noob here. Looking at the skineelab graphs of the delta t for certain radiators its nice to see what you can expect to achieve. I'm trying to figure out what I can expect when my whole loop is under load. Which is dandy but I don't know how to factor in two radiators.

I have a GTX580 which apparently puts out about 350W under load stock. Mine is not stock and I would guess I'll put out about 400W according to the Skineelabs graphs, an RX360 with 1400RPM fans with 400W heat load results in a delta t of 8.5. If I added my overclocked 1090T which does about 350W overclocked under load thats 750W. On the same rad that ups the delta t to 15.5.

What happens when you throw another RAD in the loop? How do you calculate the new delta t with the same heat load? Do two identical rads mean half the delta t for the same heat load?
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post #2 of 6
In a perfect world, yes two RADs would mean half the Delta T value; though the world isn't perfect.

With a second RAD added in you could expect about 75% scaling.

So in a numerical sense, a Delta T of ~11.6
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by Tator Tot;12408110 
In a perfect world, yes two RADs would mean half the Delta T value; though the world isn't perfect.

With a second RAD added in you could expect about 75% scaling.

So in a numerical sense, a Delta T of ~11.6

Thank you. I figured it wouldn't be perfect but I was wondering how the scaling worked.

Edit: cant rep you
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post #4 of 6
Quote:
Originally Posted by barrpet;12408379 
Thank you. I figured it wouldn't be perfect but I was wondering how the scaling worked.

Edit: cant rep you
No need to worry about REP.
Actually scaling really depends on the loop. Blocks & pumps vs flow rate, etc.

75% is usually a good number to assume though.
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post #5 of 6
Radiators scale much better, they don't add much restriction compared to waterblocks (usually less than 1/6th of a single block) and the physics behind them is pretty simple.

I'd assume 60% scaling, and more than likely you'll get much closer in a real world test.

Also, the GTX580 only consumes 350w during FurMark load, so unless you are going to be spending most of your time benching I would base your loop around their gaming load of around 200W each. With overclocking more like 300W.
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post #6 of 6
If you plan on folding with a 580 then you will want to be in the 300w+ range. I notice you fold only reason I say it.

I know my cards get hottest while folding.
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