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Need some input on potentially restrictive radiators in a loop

post #1 of 6
Thread Starter 
I'm doing my first custom water cooling loop.

Case: Phanteks Evolv ATX
CPU: Intel 6700K, EK Supremacy EVO block
GPU: Nvidia 780, EK full water block

Pump: either an EK D5 or EK DDC 3.2

Goals: EXTREMELY low noise, maybe some overclocking of the GPU for gaming.


I've been using a radiator roundup at ExtremeRigs for some data to determine if I'll have enough cooling. The Evolv ATX case is smaller and more constraining than reviews would have you think. The Fractal Design S is much easier to work with, but for a few reasons, I'm sticking with the Evolv ATX.

The best radiator combo for size seems to be a 360 in front and a 240 up top (though a 280 up top is possible too). Where the real crunch comes in is radiator thickness, especially up top. Anything thicker than 30mm (plus fans) up top is doing to be lower than at least the top screws of the CPU block. So, I was really trying to keep with a 30mm radiator, at least up top.

The Hardware Labs Nemesis GTS 30mm radiators have (according to the tests at ExtremeRigs) great results, especially at lower fan speeds. However, they are highly restrictive. There's even a note about considering using two pumps if you use these radiators.

I was hoping someone with some experience could comment on either the D5 or the DDC 3.2 pumps and these HW Labs radiators, given the loop I've described (CPU, GPU, pump, res, 360mm HW Labs Nemesis GTS and 240mm HW Labs Nemesis GTS.

Failing this, i was considering EK's PE series radiators, which increases thickness to 38mm.


I welcome any input at all!

Oh - one more thing... On rigid tubing. Thoughts on 12mm vs 16mm OD rigid tubing?
post #2 of 6
If noise is such a significant concern, I recommend you stay away from the DDC pump, and use a variable-speed D5 (or two).

Also make sure you'll be able to mount the HWLabs radiators. They use M4 threading. EK uses M3.

There won't be much of a practical difference between 12mm and 16mm OD for rigid tubing.
post #3 of 6
That HWlabs uses M4 is not the main problem. smile.gif Its that the HWLabs Rads tend to be somewhat wider as "regular" rads
Most rads are width of the fan eg 122-124 (for 120mm fan), HWLabs are a bit wider eg 132-134. So, they may not "fit" everywhere.
post #4 of 6
If it suits your routing, you could consider using the crossflow edition of the Nemesis GTS rads. The restrictiveness of those is much less than the u-flow versions. The drawback is that you have to allow for there being an end tank at both ends of a x-flow rad.

Just another idea to throw into the mix. biggrin.gif
post #5 of 6
I think your way over worrying and overthinking it for the rad restriction. Tests are meant to bring out the worst case possible weaknesses, but we rarely see those weaknesses in real world setups. There are tons of builds that use a single D5 or DDC with multiple rads and several blocks and have no problems. The D5 vario is nice because you can dial it in to what works best with your setup, and most people set it and forget it at 4. The DDC PWM is also very popular, but if you want what most people consider the "win-win" situation, go with a D5 vario.

IMO, if your going to bend your own tubing then either size works well, but if your going to use elbow fittings for the bends I personally do not like the size of 16mm fittings on elbows, they seem huge and out of place to me. 12mm fittings on elbows seem to flow much better, but in the end its what you think looks best, so you should search and look at a LOT of loops in order to find your preference.
 
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(8 items)
 
 
CPUMotherboardGraphicsRAM
intel i5 750 Lynnfield Gigabyte GA-P55-USB3 ASUS Strix GTX 960 G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin... 
Hard DriveCoolingCoolingCooling
Crucial BX100 SSD 500GB EKWB EK-KIT L120 Corsair SP120 Koolance 2x140mm Radiator HX-CU1402V 
CoolingCoolingOSMonitor
Corsair AF140 Bitspower VG-NGTX960 Windows 7 Ultimate 64 bit Samsung Curved 27" S27D590C 
KeyboardPowerCaseMouse
Corsair Strafe RGB Apevia Iceburg 680 watts Apevia X-Sniper 2 EVGA Torq X3 Laser 
CPUMotherboardGraphicsRAM
AMD Phenom 9750 ASUS M3A78-CM PNY XLR8 GTX 460 Corsair XMS2 (4 x 1GB) 
Hard DriveCoolingCoolingPower
Hitachi 5K500 Silenx 92mm EFFIZIO Corsair SP 120 Red LED Antec 500watt 
CPUMotherboardGraphicsRAM
Intel Core i5-6400 Skylake ASRock A170A-X1/3.1 Gigabye G1 Gaming GTX 970 Windforce CORSAIR Vengeance LPX 16GB (4 x 4GB) 288-Pin DD... 
CoolingCoolingCoolingCooling
Bykski CPU-XPR-A High Performance Acrylic Nicke... EKWB Acrylic Nickel GPU Block Monsoon MMRS Reservoir Bykski BY-PUMP-XPH-PA Water Cooling Pump 
CoolingCoolingCoolingCooling
Koolance 240 30 FPI Radiator Magicool 280 14 FPI Radiator Bitfenix Spectre PWM 120mm Fan ML140 140mm PWM Premium Magnetic Levitation Fan 
OSPowerCase
Windows 10 Pro Corsair RM Series 850 Thermaltake Suppressor F31 
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post #6 of 6
I've had a DDC run through nine blocks and currently have a D5 running through eight radiators. Either one will work fine, though I would recommend the D5 as it has a ton more accessories you can jazz it up with.
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