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The importance of the "order" of your loop? - Page 6

post #51 of 110
Quote:
Originally Posted by Nordar View Post
As mentioned before each to his own. Some see benefit in maximum performance at the potential cost in looks and increased complexity of the tubing. Others see benefit in clean looks and potential minimal tubing which could provide easier filling and bleeding. Either way the difference is small and down to preference.

Personally I will go for clean looks. In my current build I think I actually might end up with res->pump->gfx 1 + gfx 2 (parallel) -> Mostfet 1 -> NB/SB -> CPU -> Mosfet 2 -> radiator 360 -> radiator 240 -> res. I think it will do well anyways even with a decent 4.0-4.2 24/7 OC on my I7 930. I am not into benchmarking.

IF I where to go for maximum performance I would go res -> pump -> radiator 1 -> radiator 2 -> cpu -> the rest...

This would provide maximum temperature drop over the radiators before the water hits the CPU. The CPU with a 150 Watt output or so would only heat the water by about 0.25 degrees with a 2 GPM flow so no need for radiator after CPU.

Thats what I (currently) believe.


/Nordar
What if your first radiator got the temps to ambient? Or say, within a degree or two of ambient? Would you even need a 2nd rad at all? Or put the 2nd before/between the GPUs?
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post #52 of 110
Quote:
Originally Posted by Solmors View Post
What if your first radiator got the temps to ambient? Or say, within a degree or two of ambient? Would you even need a 2nd rad at all? Or put the 2nd before/between the GPUs?
This.

If the 1st radiator is capable of getting the temp as low as it would go anyway then you would benefit from putting the 2nd radiator after the CPU for lower temps on your GPU(s).

You have to take a given flow rate, figure out the maximum temp drop across you radiators with a given fan at a certain speed, how much heat each component adds then configure accordingly to maximize efficiency of your radiators.

Of course there is quite complicated math involved there, but that's the general idea.
Edited by Shrimpykins - 8/23/10 at 4:34pm
 
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post #53 of 110
So

res->pump->rad1->rad2->rad3->cpu->nb/sb->gpu is the same as
res->pump->rad1->cpu->rad2->nb/sb->rad3->gpu

Option 1 will save on tubing and tidiness but from everything I've read people always say have the rad before the block? What would be the best course of action if I'm running a 980x, ek fullblock and 3 x 480gtx's?
post #54 of 110
Thread Starter 
Quote:
Originally Posted by jluhiex View Post
So

res->pump->rad1->rad2->rad3->cpu->nb/sb->gpu is the same as
res->pump->rad1->cpu->rad2->nb/sb->rad3->gpu

Option 1 will save on tubing and tidiness but from everything I've read people always say have the rad before the block? What would be the best course of action if I'm running a 980x, ek fullblock and 3 x 480gtx's?
This is exactly what this entire thread is about.
post #55 of 110
watercooling 101 from bit-tech

"Despite one part of your loop getting what seems to be slightly preferential cooling treatment (right after the radiator), the overall water temperature won't change much at all. Why? Well, a closed system will always reach a state of equilibrium. The cooling from the radiator will draw heat from the entire system by convection and conduction, as well as other topics that are well above the scope of this guide. Suffice it to say that though your CPU might get a half a degree cooler by putting it directly after your radiator - but if it's even that much, I'd be surprised.

The same is also true of pressure, so don't think you're doing yourself a favour by sticking that northbridge block at the end. Wherever the most restrictive rate of flow is for your system will always be the flow for the whole system - the whole system must be equal. And though there are points where pressure is more (right before a block opening, for example), for the most part it will distribute itself evenly again right afterwards. "

source: bit-tech.net

http://www.bit-tech.net/hardware/coo...rcooling_101/7
    
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post #56 of 110
Thread Starter 
Quote:
Originally Posted by pgmoney View Post
watercooling 101 from bit-tech

"Despite one part of your loop getting what seems to be slightly preferential cooling treatment (right after the radiator), the overall water temperature won't change much at all. Why? Well, a closed system will always reach a state of equilibrium. The cooling from the radiator will draw heat from the entire system by convection and conduction, as well as other topics that are well above the scope of this guide. Suffice it to say that though your CPU might get a half a degree cooler by putting it directly after your radiator - but if it's even that much, I'd be surprised.

The same is also true of pressure, so don't think you're doing yourself a favour by sticking that northbridge block at the end. Wherever the most restrictive rate of flow is for your system will always be the flow for the whole system - the whole system must be equal. And though there are points where pressure is more (right before a block opening, for example), for the most part it will distribute itself evenly again right afterwards. "

source: bit-tech.net

http://www.bit-tech.net/hardware/coo...rcooling_101/7
+rep...great find, thanks!
post #57 of 110
It boggles the mind to be honest...

From your link...
Quote:
It's worth noting that you'll usually cool a CPU and GPU better on two different, smaller loops than on one big one, but this is your setup - build it how you like it.
So the same people making the argument for "equilibrium loops" (from 2007 btw) are the ones also making the argument for a dual loops. I find this to be contradictory.

If the purpose of proving that the order of a loop doesn't matter, even at a slight sacrifice of performance, is to justify routing tubing in a cleaner fashion... then having a single loop over a dual loop should also be preferred using the same logic.

For me, this totally discredits your source (that and the fact that its from 2007).
post #58 of 110
I agree but I was looking and from what I seen this is something I felt would be good to add to the topic at hand for more debate.

I am not saying they are right or wrong I just wanted to point the article out.
    
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post #59 of 110
Thread Starter 
Fortunately we know that 2 loops have been proven to be no more effective than 1 loop, so being wrong about that actually helps support their first assertion.
post #60 of 110
Quote:
Originally Posted by Corrupted View Post
Fortunately we know that 2 loops have been proven to be no more effective than 1 loop, so being wrong about that actually helps support their first assertion.
They're suggesting that you should use dual loops, not arguing against it.

edit: I think I misunderstand what point you're trying to make. How could being wrong about something strengthen your case?
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