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Water flow rate question.

post #1 of 7
Thread Starter 
I have just ordered some new parts to add my GPUs to my loop, in the end, my loop will consist of these:

2x MCP355 in series
3x EK VGA Supreme HF (Copper + Acetal version)
1x Koolance CPU-370 (My HF has Problems with the Nickel coating)
2x RX360 Rads

With these parts, according to Martins flow calculator I should be getting around 1.6 GPM, my issue is, however, that my supplier is out of the VGA Supremes and I would have to wait several weeks for more to come in. So my alternative would be the XSPC Rasa GPU block, however this is much higher restriction and would reduce my flow to around 1.1 GPM. Do you guys think this would cause any performance loss, or would I be better of sticking with the EKs for the better flow rates?

Thanks in advance.

NOTE: These blocks aren't in the flow calculator but I used ones with very similar flow-pressure curves.
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i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
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Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
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My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
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post #2 of 7
Wow, the XSPC VGA block is quite restrictive.
Edited by andrewmchugh - 10/24/11 at 11:01pm
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post #3 of 7
get a full GPU block. you'll thank yourself for doing it in the future.
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post #4 of 7
Thread Starter 
Wow, that looks even worse than the testing that Skinnee did! This is what I was looking at originally: http://skinneelabs.com/universalgpu-nv480/8/ I am suspecting that putting three of those XSPC blocks in the same loop may not be a particularly wise idea! I guess I may just end up waiting a month for the EKs to arrive then.

EDIT: Also, full-cover is not an option thanks to non-reference cards.
My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
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EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
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Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
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Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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post #5 of 7
Little to no performance increase going from 1gpm to 1.6gpm. So long as your getting 1gpm your good to go.
post #6 of 7
If you have to wait, you might as well get this, since your doing xFire/SLI and all. Just make sure you get a parallel bridge.

Also you may want to look at the XSPC Rasa block as it seems to be quite a good performer.

http://martinsliquidlab.org/2011/09/...pc-raystorm/5/
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post #7 of 7
Thread Starter 
I ordered the CPU block from a separate place to the VGA blocks so that has already arrived, as for the GPU blocks I think I will be changing to the XSPCs, mainly because of the effect of flow rate on the temperatures of the DDC pumps. It appears that getting around 1.1 - 1.2 GPM would affect the pumps temperatures and I would like to ensure their longevity and I think with that ever little bit helps.
My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
KeyboardPowerCase
Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
  hide details  
Reply
My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
KeyboardPowerCase
Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
  hide details  
Reply
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