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best loop design - Page 2

post #11 of 22
woot i was right!! lol
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post #12 of 22
Quote:
Originally Posted by pauldovi View Post
You would not be able to tell the performance difference between the two. You are talking about less than .1C. Go with which-ever is easiest to set up for you.
The water is moving so fast that it doesn't matter. More importantly, use as little tubing as possible and keep eblows and extremly tight bends out of the loop.

Use the second method for peace of mind. Don't expect a 10C drop though.
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post #13 of 22
Quote:
Originally Posted by jamescardenas07 View Post
thanks for the input guys.. ive tried both loop setups and ive dropped 2C using the 2nd method
Nice!
    
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post #14 of 22
Quote:
Originally Posted by jamescardenas07 View Post
thanks for the input guys.. ive tried both loop setups and ive dropped 2C using the 2nd method


Now you see why most people say pump-rad-cpu-any other blocks...
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post #15 of 22
Quote:
Originally Posted by jamescardenas07 View Post
thanks for the input guys.. ive tried both loop setups and ive dropped 2C using the 2nd method
How many times and how did you test? A 2C difference seems to be a bit much...
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post #16 of 22
Quote:
Originally Posted by kidwolf909 View Post
I would say pump > cpu > rad > res > pump.

Reasoning: You want the highest velocity water hitting the CPU block, which is the first component after the pump, then on to the rad to cool the recently heated water, and then res because it's right in front of the pump in line so any bubbles generated throughout the ENTIRE loop will be foiled before the pump hits again.

Just my
The velocity of a fluid in an enclosed area (tube) moves at a constant speed v.
THE ONLY TIME THIS SPEED VARIES IS WHEN THE AREA OF THE CROSS-SECTION (tube) CHANGES, AS THE FLOW RATE (defined in physics as A*V where A is the cross-sectional area of the tube and v is velocity) IS ALWAYS CONSTANT

so with NO speed difference, (unless your tubing changes sizes through your loop ) i would say pump-rad-cpu-gpu-res
    
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post #17 of 22
Quote:
Originally Posted by Sreenath View Post
The velocity of a fluid in an enclosed area (tube) moves at a constant speed v.
THE ONLY TIME THIS SPEED VARIES IS WHEN THE AREA OF THE CROSS-SECTION (tube) CHANGES, AS THE FLOW RATE (defined in physics as A*V where A is the cross-sectional area of the tube and v is velocity) IS ALWAYS CONSTANT

so with NO speed difference, (unless your tubing changes sizes through your loop ) i would say pump-rad-cpu-gpu-res
hmmm i wouldnt say a loop has a "cross-sectional area" at all!
all the barbs in the loop have a smaller diameter than the tubing, a simple A*V will just not cut it. For a loop is far more complicated in calculation than just that.
Plus the water block, plush the res, plus the T line, plus the rad.....
not that simple
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post #18 of 22
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
How many times and how did you test? A 2C difference seems to be a bit much...
ive always used the 2nd method.. but someone recommended the 1st method to me and i tried it for a month, and my temps never touched the temps i had before.. then i reverted back to my old loop and it all went back to the temps i used to see

i thought the 1st method would be better because the cpu block would get the most flow before it hits the rad and the rad will cool of the water and the res could help regulate the cooler water which i thought would result in slightly lower temps
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post #19 of 22
Yeah, it's an easy misconception. You'd think that something has to be best right after the pump and it is, but it's pressure only. The reason pressure doesn't have any effect on how well it cools is because water and most liquids by nature are incompressible. If water was compressible, the higher pressure would result in a more dense fluid which could then have better thermal transfer ability. Theoretically there is some truth to that, but the amount is so small you can ignore it.

If water was compressible I would take a T line and extend it up my wall as high as it could go, this will effectively put the entire loop under more pressure. Unfortunately it's not, so the only thing that would do is look a bit funky and perhaps stretch your tubing out ever so slightly...in the end not enough to make a difference.

What does make a difference is the temperature variation throughout the loop..it's still only a few degrees C at best, but it's at least measurable.

Thanks for sharing your real world results though, that's what matters the most
    
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post #20 of 22
Thread Starter 
my temps are high tho.. but you also gotta put in mind that im in hawaii.
ambient is about 28-29C and my room gets even hotter

my idle is around 54C and loads at about 62C
the specs of my cooling is in my sig

i also lapped my c2d and apogee and i made sure its completely flat
i added as5 the way the instructions says on their website
bled for 3 hours

what can be the problem?
a e6400 running at 2.8ghz on stock volts that lives near me had a idle of 42C and load around 51C and is running a apogee, mcr120 with a weaker pump.

can anyone put some input into my other problem? maybe some as5 tips or on how to properly bleed a w/c system?
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