Liquid Cooling Setup

tj76352 · Aug 8, 2013

I've been doing a lot of research about liquid cooling for my new build to be completed at the end of this year.

I am looking specifically at this kit: http://www.xs-pc.com/watercooling-kits/raystorm-d5-ax360-watercooling-kit

My main question is, will that kit be enough radiator wise and pump wise to cool a mildly OCed 4770k and 2 EVGA Hydro copper GTX 780's in SLi?

If not for the radiator, would adding an AX120 radiator to the exhaust slot in the back of my HAF X solve the issue? If not for the pump, would the twin pump version of the pump/res combo solve that issue?

Thanks!

manofchalk · Aug 10, 2013

Your going to need more than a 360+120mm rad to cool down that loop.
I suggest you look into external mounting for a 2nd 360mm rad, I know it can be done as I have it on my HAF-X.

You could also remove the HDD bays and mount a front 240mm rad, or look into a rad-box solution.

tj76352 · Aug 10, 2013

Thanks for the quick response. I was hoping to keep everything internal for my loop.

I figured up that the TDP is ~700W for the system with a mild OC on the CPU. I've seen varying comments while researching, but as a general rule, it seems 120mm worth of a high quality radiator with equivalent quality fans will dissipate ~200W of heat. Going by that, I would need at least 480mm worth of radiator.

However, my concern when adding more than a single radiator in my loop is that the pump will struggle to keep up. I will definitely look in to the front mount 240mm, or possibly another case. I've seen the Corsair 900D and the radiator mounting options are tempting.

What is your loop order and what kind of pump do you use if you don't mind me asking?

manofchalk · Aug 10, 2013

Radiators are very low restriction, if your pump is having issues then the rad/s is the last place you would look.
Putting your GPU's in parallel will reduce flow restriction dramatically, 1/4th of having them in Serial.

The amount of heat a rad can dissipate depends on the Rad and the fans attached to them, there is no reliable rule of thumb here. Most i can suggest is that you look up reviews on the rads your looking at, that will have a chart that shows its heat dissipation at various RPM's. I suggest aiming for a reasonable speed like 1000RPM, a rad may cool 400W with 2000RPM fans but it will sound like a jet engine regardless of how good the fans are.

Res-> Koolance PMP-500 pump -> EX360 -> RS360 (external) -> XSPC Raystorm CPU block -> Heatkiller 79X0 GPU block -> Res. Using XSPC Xinrullian 1650RPM fans running at ~800RPM.
Loop order doesnt matter beyond a degree or two, arrange it as makes sense on the day. The only exception is that the res must always be directly before the pump and physically above it, that way it can never run dry.

tj76352 · Aug 10, 2013

Thanks again for the quick response. I wasn't sure if I would need a radiator in between the CPU and GPU(s).

I can deal with a 1-2° difference to have a much neater and cleaner case.

I suppose a reservoir/pump combination would cancel out that exception?

manofchalk · Aug 10, 2013

Combined pump/res' are fine.
Though I recommend you reconsider if its 5.25" bay mounted and/or the pump isn't removable. A pump in the 5.25" bays is near impossible to decouple and you will get a lot of vibration induced noise. A permanently fixed together pump and res can cause issues if either has issues or is insufficient. I was in that position with my loop, and had to pay ~$30 extra on top of a new pump for a reservoir.

tj76352 · Aug 10, 2013

Thanks for all your input, it's been much appreciated. I've got some more research to do now on the reservoir and pump!

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