Overclock.net › Forums › Cooling › Water Cooling › Dual or Single Loop?
New Posts  All Forums:Forum Nav:

Dual or Single Loop?

post #1 of 16
Thread Starter 
I have the Extended Ascension and decided to mount a 1080 rad internally.
Only Problem is that I am not sure either to put the CPU and GPU´s on single loops or in a full loop.

Hardware:i7 950 : 4.5 GHZ
GTX 580 SLI(borrowed ):stock clocks
WC:EK Supreme HF Full Nickel
2x EK Waterblocks
1x 360 radiator (Phobya G Changer 1.2)
1x 1080 Xtreme Phobya radiator
Phobya Balancer 250 res
MCP 655
1/2" tubing


1.)Full loop:If all the blocks and rads were in a single loop...my MCP 655 at setting 5 would be able to keep the flow just above 1 GPM.
Also I figured the 1080 and 360 rad together would not only dissipate the heat they also could provide extra cooling performance due to their massive cooling ability.
As said before flowwise it would all stay over 1 GPM so minimum acceptable flowrate would be achieved.

2.)Single loops:The CPU would be in a single loop with the 360 rad.

Both GPU´s would get the 1080..but I think it would be a waste of rad space because the overkill would not be really benefitial but also the heat dump of the CPU would not additionally have to be dissipated .

So what do you think would give me better temps? option 1.) or 2.)?
Also would the extra flow the single loop benefits from really vastly outnumber the tempreture results of a full lop with the 360 and 1080?


Last question is about the controlunit.
I am not sure if you know it but I have the Alphacool Heatmaster with a thermosensor in order to controll the Fans blowing on the 360 rad according to the watertemps ...to keep it all quiet even tough they are Gentle Typhoons.
In the full loop this would not make much sense because of the 1080 already leading the temps....but in the single loop it would make more sense right?
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
post #2 of 16
If memory serves me correctly, Swiftech did some testing on this and found that the vast majority of the time you get more benefit from a single loop because all components can utilize the entire cooling capacity you have between all your rads. And, for non-benching, you typically don't have your GPU's and CPU at 100% load. Also, a single loop uses less tube (better internal air flow) and fewer components such as pumps and res so it cost less.

You only really benefit from dual loops if you are really maxing out your GPU's and CPU's at the same time for extended periods. But if your really trying to get the lowest delta's then realistically you should have a separate loop for each component that is cooled so that none of them affect the cooling ability of the other. That seems a bit crazy for anything other than epeen to me, but I'm and old fart.
post #3 of 16
I would say single loop over dual for the following reasons. More cooling power to be split across all of your parts, less mess due to less tubing and clutter. You are over the 1 gpm mark so you don't gain much performance with the higher flows from two separate loops. Easier maintenance down the line with one less loop to empty/fill/bleed/test.

I am not well versed with with auto fan controllers so I have no idea in that department other than you will get less noise due to the higher over all higher heat dissipation of a single loop over duals I would think.
Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 @ 4.2 GHz Asus Rampage III Extreme ATI Radeon HD 5970 6 GB Corsair Dominator Tri-Channel 
Hard DriveOSMonitorKeyboard
32 GB OCZ SSD, 2x 150 GB WD Velociraptor 10000 rpm Windows 7 Ultimate 64 bit 2x Acer AL1622W Cyborg Eclipse 
PowerCaseMouse
850 W Corsair Modular Cool Master HAF 932 Logitec MX 518 
  hide details  
Reply
Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 @ 4.2 GHz Asus Rampage III Extreme ATI Radeon HD 5970 6 GB Corsair Dominator Tri-Channel 
Hard DriveOSMonitorKeyboard
32 GB OCZ SSD, 2x 150 GB WD Velociraptor 10000 rpm Windows 7 Ultimate 64 bit 2x Acer AL1622W Cyborg Eclipse 
PowerCaseMouse
850 W Corsair Modular Cool Master HAF 932 Logitec MX 518 
  hide details  
Reply
post #4 of 16
Here is a test that swiftech ran.

There conclusion:
Quote:
Conclusions:

Under extreme performance scenarios, and from a pure performance standpoint, dual loops versus single loop are neither better nor worse, under the strict condition that the load ratios are evenly balanced.
Under the most commonly encountered loads though, single loops do win.

Under both of the above use scenarios, single loops also win from a reliability standpoint because of pump redundancy.
Mods, if this link is not OK, plz let me know and I will remove it.
Edited by Mayiko - 3/10/11 at 12:45pm
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
post #5 of 16
Thread Starter 
Quote:
Originally Posted by Kung Pow View Post
I have the Extended Ascension and decided to mount a 1080 rad internally.
Only Problem is that I am not sure either to put the CPU and GPU´s on single loops or in a full loop.

Hardware:i7 950 : 4.5 GHZ
GTX 580 SLI(borrowed ):stock clocks
WC:EK Supreme HF Full Nickel
2x EK Waterblocks
1x 360 radiator (Phobya G Changer 1.2)
1x 1080 Xtreme Phobya radiator
Phobya Balancer 250 res
MCP 655
1/2" tubing


1.)Full loop:If all the blocks and rads were in a single loop...my MCP 655 at setting 5 would be able to keep the flow just above 1 GPM.
Also I figured the 1080 and 360 rad together would not only dissipate the heat they also could provide extra cooling performance due to their massive cooling ability.
As said before flowwise it would all stay over 1 GPM so minimum acceptable flowrate would be achieved.

2.)Single loops:The CPU would be in a single loop with the 360 rad.

Both GPU´s would get the 1080..but I think it would be a waste of rad space because the overkill would not be really benefitial but also the heat dump of the CPU would not additionally have to be dissipated .
Thank you for your answers guys
But could you especially include the 1080 rad into your theories?
Because that changes circumstances a little bit.

I mean would the 1080 + 360 rad together in the full loop with CPU and GPU result in better tempretures than the CPU on single with a 360 and GPU single on the 1080 temps added together? Because of the extra cooling space and the ability of providing all parts equally with cool water and more dissipation possibilities?
The CPU should get better temps with a 1080 in the loop than in a 360 rad only loop?

If I had a 360 and 480 rad I would go dual loop for sure cpu to the 360 and 480 to the gpu´s but the 1080 makes the situation more complicated.

I chose to geta 1080 because it is only 140€...the RX480 for example costs 120€ so I figured 20€ more for at least 40% more cooling performance(only in comparison to the RX480...compared to other 480 rads the performance increase is almost 70%)
Edited by Kung Pow - 3/10/11 at 12:50pm
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
post #6 of 16
Quote:
Originally Posted by Kung Pow View Post
Thank you for your answers guys
But could you especially include the 1080 rad into your theories?
Because that changes circumstances a little bit.

I mean would the 1080 + 360 rad together in the full loop with CPU and GPU result in better tempretures than the CPU on single with a 360 and GPU single on the 1080 temps added together? Because of the extra cooling space and the ability of providing all parts equally with cool water and more dissipation possibilities?
The CPU should get better temps with a 1080 in the loop than in a 360 rad only loop?

If I had a 360 and 480 rad I would go dual loop for sure cpu to the 360 and 480 to the gpu´s but the 1080 makes the situation more complicated.

I chose to geta 1080 because it is only 140€...the RX480 for example costs 120€ so I figured 20€ more for at least 40% more cooling performance(only in comparison to the RX480...compared to other 480 rads the performance increase is almost 70%)
Take a look at the link above. As long as the pump can push the loop there is really no difference between single and dual loops. If you are going dual loops you will have 2 pumps. If you put those same two pumps in a single loop, it will all equal out.
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
post #7 of 16
Thread Starter 
Thanks but I really wanted to know if their was an advantage in having the 1080 rad in the full loop?
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
post #8 of 16
Quote:
Originally Posted by Kung Pow View Post
Thanks but I really wanted to know if their was an advantage in having the 1080 rad in the full loop?
Vs what? Having it in a separate loop? You will get the same performance with single and dual loops.

Maybe I am not understanding the question
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
Alien On Steroids
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 Gigabyte X48-DS4 4870 8GB (2x4GB) 
OSMonitor
Windows 7 x64 Dell 2408WFP 
  hide details  
Reply
post #9 of 16
Thread Starter 
ok^^ I am sure you know what a 1080 rad is? (3x360) http://www.aquatuning.at/product_inf...m-Red-LED.html

This sort of rad has extreme cooling ability....my question is if the CPU temps would better in a full loop with the 1080 + 360 + gpu or in a single loop with just the cpu and 360 rad.
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
Project Rapture
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.7 GHZ Gigabyte X58-OC MSI GTX 580 Lightning @ 1GHZ 12 GB Kingston Hyper X @ 2200 MHZ 
Hard DriveOptical DriveOSMonitor
SSD Corsair F40 DVD,DVR,Blue Ray Windows 7 Ultimae 64 bit Sony Bravia Full HD 42" 
PowerCaseMouse
Revolution +85 1050 Watt Little Devil V8 White Crysis Edition Microsoft 
  hide details  
Reply
post #10 of 16
Put it all in one loop, at least you will be utilising all your rads to its potential.
    
CPUMotherboardGraphicsRAM
[Intel] i7 2600k | 4.8Ghz HT 24/7 [Gigabyte] P67A-UD7-B3  [AMD] Radeon HD6990  [Samsung] 16GB 30nm 1866mhz 
Hard DriveCoolingOSMonitor
[G Skill] Pheonix Pro 60G SSD - Boot | 2TB Sams... Custom EKWB | XSPC | Swiftec | Primochill | Bit... [Windows7] Professional x64 [Acheiva] Shimian ISP-I 1440p 
KeyboardPowerCaseMouse
[CoolerMaster] Storm TK MX-Brown [Corsair] HX1000 | MDPC Sleeved [Silverstone] Modified Temjin TJ07 [Razer] DeathAdder 
Mouse PadAudioOther
Steelseries QCK [Asus] Xonar DG Sennheiser HD558 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
[Intel] i7 2600k | 4.8Ghz HT 24/7 [Gigabyte] P67A-UD7-B3  [AMD] Radeon HD6990  [Samsung] 16GB 30nm 1866mhz 
Hard DriveCoolingOSMonitor
[G Skill] Pheonix Pro 60G SSD - Boot | 2TB Sams... Custom EKWB | XSPC | Swiftec | Primochill | Bit... [Windows7] Professional x64 [Acheiva] Shimian ISP-I 1440p 
KeyboardPowerCaseMouse
[CoolerMaster] Storm TK MX-Brown [Corsair] HX1000 | MDPC Sleeved [Silverstone] Modified Temjin TJ07 [Razer] DeathAdder 
Mouse PadAudioOther
Steelseries QCK [Asus] Xonar DG Sennheiser HD558 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › Dual or Single Loop?