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first WC system - advice needed.

post #1 of 32
Thread Starter 


light Grey=existing case fans & direction of flow
orange = tubing

Hello all, i'm new to Overclock.net, but not new to PC building ect. (i've spent a fair bit of time on the Facepunch forums hardware section)

i've come here with a few questions regarding a watercooling loop i am planning to build.

above is my planned diagram, i was hoping to get a XSPC Rasa 750 RX360 Kit and add GPU blocks + an additional 2x/1x 140mm rad, but i fear that this can't dissipate that amount of watts of heat from 2 6870's in crossfire.

the build is meant to be mostly budget, but if i need to i can afford some high-end parts (not too luxury, though)

the colour theme of the loop is supposed to be orange, and that brings me to the question: coolant with dye? water with dye and kill-coil? orange transparent tubing (probably will be very hard to find) with water?

my current CPU is a AMD phenom II X4 925 OC's to 3.5 Ghz, planning to upgrade it to a future gen of CPU when it comes out, right now i can't overclock it any further for some reason to do with RAM, and i havent' been bothered finding out what, and i'm pleased with the temps it has (30 normally, 50 at absolute max). and considering newer generations of CPU's will run cooler i'm considering keeping my CPU on air (and saving on the waterblock)

my current case is a HAF-X, whitch i primarily picked because you can mount a 3-fan rad on the inside.

any other suggestions on parts, the layout or any ideas will be greatly appreciated.

thanks in advance .
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post #2 of 32
that, isn't the greatest idea. the water is going to take the path of least resistance and whichever block has the most, will have crap for temps and flow rate. dump the splitters and either run straight from the cpu to the gpu or vice versa. 6870's don't put out a ton of heat and that amount of rad power can handle it without any major problems.

question though, if you're using a haf x and plan to use the x20 750 why on earth would you have it on the bottom of the case?
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post #3 of 32
Thread Starter 
as i said, first watercooling system, your advice is exactly why i posted here.

What about this sytem? the coolant goes 3x rad -> res/pump -> CPU - > 1x rad -> GPU cards -> 3x rad so the coolant is cooled down a bit in the small rad before it reaches the CPU cards.


i dont know what you mean by the pump, where else would it go?

and i presume the flow through the crossfire would be from one card to the other.
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post #4 of 32
Quote:
Originally Posted by Nerdrage View Post
as i said, first watercooling system, your advice is exactly why i posted here.

What about this sytem? the coolant goes 3x rad -> res/pump -> CPU - > 1x rad -> GPU cards -> 3x rad so the coolant is cooled down a bit in the small rad before it reaches the CPU cards.


i dont know what you mean by the pump, where else would it go?

and i presume the flow through the crossfire would be from one card to the other.
Imho you should try to place the X2O pump/res somewhere higher.
post #5 of 32
Thread Starter 
so i guess i should put it ontop of the HDD cage then?

and what fluid do you reccomend?
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post #6 of 32
Yes I would put it higher. For fluid it is generally recommended to use pure distilled water, with either a silver coil or some kind of biocide.
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post #7 of 32
Its designed to take up 2 drive bays so that's the ideal place.
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post #8 of 32
Loop order does not matter. Believe it or not the water coming out of your CPU block is only going to be 0.3 - 0.6C warmer than when it went in.

I would run:

Pump --> CPU --> GPUs --> Rear Radiator --> Top Radiator --> Pump as it will give you the shortest and cleanest tube routing.
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post #9 of 32
Quote:
Originally Posted by charliehorse55 View Post
Loop order does not matter. Believe it or not the water coming out of your CPU block is only going to be 0.3 - 0.6C warmer than when it went in.

I would run:

Pump --> CPU --> GPUs --> Rear Radiator --> Top Radiator --> Pump as it will give you the shortest and cleanest tube routing.
This. I used the cleanest tubing route I could. Temps were much better than even dual loop except at tdp for the CPU bc of massive gpu heat dump of 1kw+. go for the cleanest tubing route you can. I would get a different pump and res tho, like a mcp355 with Xspc bay res made to fit it since you will have better flowrates for only a little more cash
 
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post #10 of 32
What most people do wrong is that they manage there tubing in a way so that the water hits the radiator last like in your pictures.

That is wrong ! The right direction should be : Res ->Pump->Radiator->Blocks->Res..
this way the blocks can be supplied immediately with cool water ...if you do it like you ...the cool water coming from the rad first has to travel through the res and the pump which adds an amount of 18 watts of heat into the water ..before it can reach the blocks.
So to avoid this long trip of the water which by the way( loses its coolnes the longer it is being moved because of traction with the tubes) and the heat disposal from the pump ...manage your tubing in a way so the water always goes through the radiator first before hitting the blocks.
Edited by Kung Pow - 1/8/11 at 2:17pm
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