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Water cooling loop upgrade - Dual Loop to Single Loop - Some advice and input

post #1 of 2
Thread Starter 
Hi folks,

First time posting, although been reading this for quite a while. I’ve picked up some very good information from this site and would like
to thank whomever posted any information that I was able to use at the time.

I built my first WC setup some time ago and I have some stable data available now. My aim is to improve on the current setup (convert it to single loop possibly), as I don’t think it is as efficient as it can be, given the alternative options available. Please bear with me as I explain the whole setup, will try and structure this post as best as possible. Questions will be at the bottom, and would really appreciate some input from anybody.

My current setup is a dual loop as follows:
Case is a Thermaltake Chaser Mk1
Cases fans are 200 front intake, 200 side intake, 140 rear exhaust
Asus P9X79 Mobo, 16Gb 2133 Ram, 2 x SSDs, 2 x HDDs, Ax1200i PSU
Overall under load the system draws ~1000W from the wall.
3DMark11 Score: P17083

CPU Loop1:
Intel 3930K @ 4.5 Ghz (1.37V) (Constant, not clocking down when idle)
Res EK dual loop/dual bay
Pump EK DCP2.2 (Had to slow down pump speed as full speed made micro bubbles and coolant in the res look like a spa on full blast. Slow also brought temps down a bit)
Rad XSPC RS240 + 2x120mm Bitfenix Spectro Pro PWM – Rad hangs off back of case, fans mounted on the outside of the rad, pulling air with some assistance from the 140 exhaust. (Case > Rad > Fans pulling)
Block EK Nickel/Acetal
Tubing is 3/8”

Flow= Res > Pump > 240Rad > CPU Block > Res
Idle Temps: ~39C
Load Temps:~52C (Aida64 or Prime95)

GPU Loop2:
2 x XFX Black HD 7970 Ghz Edition @ 1200/1600 (1.25V)
Res EK dual loop/dual bay
Pump EK DCP2.2 (Slow pump speed vs fast pump speed didn’t seem to make much difference in flow rate – with the naked eye. No effect on temps)
Rad XSPC RS360 + 3x120mm Bitfenix Spectro Pro PWM – Rad mounted on top inside the case, fans mounted on top of the rad/case, pulling air to the outside
GPU blocks are XSPC Razor
Tubing is 3/8”

Flow= Res > Pump > GPU1 > GPU2 > 360Rad > Res
Idle Temps :~38C
Load Temps :~62C (Aida64 or Heaven DX11 or BF3)


Was thinking of getting a new case an converting to single loop.
Here is the plan:
Case would be a NZXT 810.
240 rad mounted in bottom of case
360 rad mounted on top of case
Pump would probably be an upgraded DCP4.0 or
Res would be replaced by a single or just one side of it re-used.
Blocks,fans,tubing stay the same.

Flow Option 1= Res > Pump > 240Rad > GPU1 > GPU2 > CPU > 360Rad > Res
or
Flow Option 2 = Res > Pump > 360Rad > CPU > GPU1 > GPU2 > 240Rad > Res
Or
Flow Option 3= Res > Pump > 240Rad > GPU1 > GPU2 > 360Rad > CPU > Res
or
Flow Option 4= Res > Pump > CPU > 360Rad > GPU1 > GPU2 > 240Rad > Res



Questions:
1. Are the CPU temps with my current setup OKish? (they’re about 15C less than on air, so to me they seem acceptable)
2. Are the GPU temps with my current setup OKish? (about 20C less than on air, so to me seem acceptable, but compared to what everybody else is getting on water, they seem quite high)
3. If not OK, could there be a culprit ?(I know the XSPC blocks aren’t the best)
4. Are there any improvements that can be made to the current dual loop setup?
5. Is it advisable going to a single loop?
6. If going single loop, which flow option seems the best?
7. If going single loop, using basically the same fans/blocks etc, can I realistically expect a more efficient result?
8. Cosmetically a new case with a single loop will look much better, but will also cost me a bit.
9. Am I just insane and should accept things the way they are and be easier on the wallet?
10. What are your views on eggplant ?

Fire away please?
post #2 of 2
Hi, I would recommend going single loop. As for the flow I have always been a fan of whatever uses the least amount of tubing and looks the cleanest. I have a hard time agreeing that it really matters who gets the water first because the water is moving so quickly it is already through the loop before it could have changed very much.

As far as the video card temps... If those xspc are not as good as other brands then you know what. That is actually better for you. The logic? The better a job those blocks do cooling off your cards the more heat they dump into your loop and if you are running 20 degrees below the normal room temp for those cards then I would say that is plenty unless you plan on OCing them further. As for the CPU we are all well aware that cpu will work fine plenty hot and if that is the core temp you are quoting and not the motherboard cpu sensor then I would say you have nothing to loose.

Combing the loops is usually a good idea because you rarely max both the cpu and gpu at the same time. However if you are folding with your cpu and gpu then this may be a different story and not one that I would be able to answer.

Why are you not letting the CPU throttle down? Does it become unstable? Most recommend you turn off all power saving settings when you are finding your OC and then to turn them back on and if it is still stable then great. It's not just saving energy it is reducing temps and possibly increasing the life of your equipment.

I want to throw something out there that you may or may not like. You could put 2 radiators in your case and if you wanted some extreme extra cooling you could put 2 quick disconnects that go out of your case to a tower with 1 or 2 4x120 or 4x140 radiators. Design the loop so that you can use a tube with quick disconnects on it to complete the loop if you disconnect the tower or you can also use a shut off valve T'd into the 2 lines on the inside of the case. When it is shut off it forces the water to go through the quick disconnect loop and when it is in the on position it would allow water to flow through it and into the other tube therefore passing the quick disconnects. If you want to do a tower and you are interested in the valve and don't understand what I am saying let me know and I will draw it out.

You seem very informed and by no way a newb. I would be very careful what recommendations you follow (even mine) without proving them before implementing them.

I have an obsidian 800D with a TFC X-Changer 360 (very similar in performance to RX360) on top and on the bottom is a RS240 (going to go). I already have waiting to be used a Black Ice quad rad either replace the 3x rad or make a tower, A EK 240 to replace the RS240 and I have a swiftech h20 with the multi input that I didn't buy for my PC but am now thinking on it.

What has me not diving in yet is that swiftech is highly recommending that you run your blocks in parallel. I am trying to find some proof data that this is true or false or doesn't matter much or maybe only matter with their restrictive water blocks. So I am either going to build a 480 tower with quick disconnects or I am going to use my swiftech HD to run all my blocks in parallel and the first radiator they return to will be the swiftech 240 with the 3 inlets and 1 outlet w/pump.

Maybe some of this info helps you...

Either way whatever you do or don't do try to verify its integrity with some data.
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Intel i7-5820k  ASRock x99 extreme 4 AMD R9 290X AMD R9 290X 
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ballistix ddr4 dual channel Samsung 850 EVO 500GB DT 5noz CPU Waterblock XSPC Razor Full Cover GPU Block 
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Silence
(20 items)
 
Secondary Rig
(9 items)
 
 
CPUMotherboardGraphicsGraphics
Intel i7-5820k  ASRock x99 extreme 4 AMD R9 290X AMD R9 290X 
RAMHard DriveCoolingCooling
ballistix ddr4 dual channel Samsung 850 EVO 500GB DT 5noz CPU Waterblock XSPC Razor Full Cover GPU Block 
CoolingCoolingCoolingCooling
XSPC Razor Full Cover GPU Block 4x120 Black Ice Xtreme GTX480 Swiftech MCP655 Danger Den Monsoon Pump/Reservoir 
CoolingOSMonitorKeyboard
Corsair Link Fan Controller Windows 8.1 Nixeus 2560x1440 Logitech G15 
PowerMouseMouse PadAudio
Kingwin PF-850 Ttesports Level10M Razer Vespula Sennheiser HD590 
CPUMotherboardGraphicsRAM
Intel i5-2500k gigabyte z68xp-ud4 Gigabyte GTX 970 G1 Gaming DDR3 1600 4x2GB 
Hard DriveCoolingOSMonitor
Western Digital Velociraptor 300GB w/ Intel RST... Corsair H100 Windows 8.1 1920x1200 HP 
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PC P+C 1000w 
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