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Question: Would this HVAC return have enough passive airflow to avoid adding fans?

post #1 of 6
Thread Starter 
Hello all,

On my build log, I have some information regarding my radiator placement and the potential for passive cooling.

Without knowing how air might flow through the MO-RA3, would someone be able to comment on the adequacy of the airflow, or my potential need to wire up the fans just in case?

Thanks in advance.
 
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24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
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Intel Core i7 3820 RAMPAGE IV EXTREME EVGA GeForce GTX 680 SC+ w/Backplate EVGA GeForce GTX 680 SC+ w/Backplate 
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EVGA GeForce GTX 680 SC+ w/Backplate CORSAIR DOMINATOR GT 16GB  Samsung 830 Pioneer BDR-206DBK 12x Internal Blu-ray Disc/DV... 
CoolingCoolingCoolingCooling
Bitspower Compression fittings - shiny Noiseblocker NB-BlackSilentPro PK-1 140mm x 25m... Noiseblocker NB-Multiframe M12-S1 120mmx25mm Ul... EK-Supreme HF - Acetal+EN (Nickel) 
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Lamptron FC4 Lamptron FC8 EK GeForce 680 GTX VGA Liquid Cooling Block EK GeForce 680 GTX VGA Liquid Cooling Block 
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EK GeForce 680 GTX VGA Liquid Cooling Block EK-FC680 GTX Backplate EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) Watercool MO-RA3 4 x 180mm PRO Extreme Radiator... 24v PMP-450S 
CoolingCoolingCoolingCooling
24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
CoolingOSMonitorMonitor
Koolance Quick Disconnect VL3N Windows 7 x64 Asus VG278H 27-Inch LED 3D Monitor Asus VG278H 27-Inch LED 3D Monitor 
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Razer Naga Epic Razer Megasoma Sennheiser PC360 FiiO E10 Headphone DAC/Amp 
OtherOtherOtherOther
Simcraft Apex 3 GT Motion Simulator CubeControls N35 Wheel + Quick Release CubeControls Cube GT Wheel + Quick Release CubeControls SLI-Box 
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post #2 of 6
If you keep the HVAC system on at all times for circulation and you've checked that there's pretty good airflow in there (like your post suggests), there's no need to put fans on your rad in the air return, it'll be just fine. Normally, the problem with running a radiator without fans is they're designed to work best with some amount of airflow, with none they do poorly. However, you'll have that airflow from the air return, and that radiator was designed for low-rpm fans so you don't need a ridiculous amount.
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Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
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post #3 of 6
Thread Starter 
Great, thank you.
 
Sim Gear
(10 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Core i7 3820 RAMPAGE IV EXTREME EVGA GeForce GTX 680 SC+ w/Backplate EVGA GeForce GTX 680 SC+ w/Backplate 
GraphicsRAMHard DriveOptical Drive
EVGA GeForce GTX 680 SC+ w/Backplate CORSAIR DOMINATOR GT 16GB  Samsung 830 Pioneer BDR-206DBK 12x Internal Blu-ray Disc/DV... 
CoolingCoolingCoolingCooling
Bitspower Compression fittings - shiny Noiseblocker NB-BlackSilentPro PK-1 140mm x 25m... Noiseblocker NB-Multiframe M12-S1 120mmx25mm Ul... EK-Supreme HF - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
Lamptron FC4 Lamptron FC8 EK GeForce 680 GTX VGA Liquid Cooling Block EK GeForce 680 GTX VGA Liquid Cooling Block 
CoolingCoolingCoolingCooling
EK GeForce 680 GTX VGA Liquid Cooling Block EK-FC680 GTX Backplate EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) Watercool MO-RA3 4 x 180mm PRO Extreme Radiator... 24v PMP-450S 
CoolingCoolingCoolingCooling
24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
CoolingOSMonitorMonitor
Koolance Quick Disconnect VL3N Windows 7 x64 Asus VG278H 27-Inch LED 3D Monitor Asus VG278H 27-Inch LED 3D Monitor 
MonitorKeyboardPowerCase
Asus VG278H 27-Inch LED 3D Monitor Microsoft wireless Silverstone ST1500 CaseLabs M10 and Pedestal 
MouseMouse PadAudioAudio
Razer Naga Epic Razer Megasoma Sennheiser PC360 FiiO E10 Headphone DAC/Amp 
OtherOtherOtherOther
Simcraft Apex 3 GT Motion Simulator CubeControls N35 Wheel + Quick Release CubeControls Cube GT Wheel + Quick Release CubeControls SLI-Box 
OtherOtherOtherOther
CST Gated Shifter DSD Sequential Shifter Bodnar FFB Wheel Hydraulic Tilton 600 Series Pedals 
OtherOther
Cobra Technology Evolution Pro Outlast Carbon F... CubeControls Formula Momo Wheel + Quick Release 
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Sim Gear
(10 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Core i7 3820 RAMPAGE IV EXTREME EVGA GeForce GTX 680 SC+ w/Backplate EVGA GeForce GTX 680 SC+ w/Backplate 
GraphicsRAMHard DriveOptical Drive
EVGA GeForce GTX 680 SC+ w/Backplate CORSAIR DOMINATOR GT 16GB  Samsung 830 Pioneer BDR-206DBK 12x Internal Blu-ray Disc/DV... 
CoolingCoolingCoolingCooling
Bitspower Compression fittings - shiny Noiseblocker NB-BlackSilentPro PK-1 140mm x 25m... Noiseblocker NB-Multiframe M12-S1 120mmx25mm Ul... EK-Supreme HF - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
Lamptron FC4 Lamptron FC8 EK GeForce 680 GTX VGA Liquid Cooling Block EK GeForce 680 GTX VGA Liquid Cooling Block 
CoolingCoolingCoolingCooling
EK GeForce 680 GTX VGA Liquid Cooling Block EK-FC680 GTX Backplate EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) Watercool MO-RA3 4 x 180mm PRO Extreme Radiator... 24v PMP-450S 
CoolingCoolingCoolingCooling
24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
CoolingOSMonitorMonitor
Koolance Quick Disconnect VL3N Windows 7 x64 Asus VG278H 27-Inch LED 3D Monitor Asus VG278H 27-Inch LED 3D Monitor 
MonitorKeyboardPowerCase
Asus VG278H 27-Inch LED 3D Monitor Microsoft wireless Silverstone ST1500 CaseLabs M10 and Pedestal 
MouseMouse PadAudioAudio
Razer Naga Epic Razer Megasoma Sennheiser PC360 FiiO E10 Headphone DAC/Amp 
OtherOtherOtherOther
Simcraft Apex 3 GT Motion Simulator CubeControls N35 Wheel + Quick Release CubeControls Cube GT Wheel + Quick Release CubeControls SLI-Box 
OtherOtherOtherOther
CST Gated Shifter DSD Sequential Shifter Bodnar FFB Wheel Hydraulic Tilton 600 Series Pedals 
OtherOther
Cobra Technology Evolution Pro Outlast Carbon F... CubeControls Formula Momo Wheel + Quick Release 
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post #4 of 6
Depending on how your HVAC is setup there may not always be air moving through that duct. Some systems have a constant flow others are on/off.
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by silvrr View Post

Depending on how your HVAC is setup there may not always be air moving through that duct. Some systems have a constant flow others are on/off.

I mention in my linked post that there is constant airflow due to both the fans being set to on and both the whole house dehumidifier and hepa filter.

I think based on the feedback, I should be good. Thank you
 
Sim Gear
(10 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Core i7 3820 RAMPAGE IV EXTREME EVGA GeForce GTX 680 SC+ w/Backplate EVGA GeForce GTX 680 SC+ w/Backplate 
GraphicsRAMHard DriveOptical Drive
EVGA GeForce GTX 680 SC+ w/Backplate CORSAIR DOMINATOR GT 16GB  Samsung 830 Pioneer BDR-206DBK 12x Internal Blu-ray Disc/DV... 
CoolingCoolingCoolingCooling
Bitspower Compression fittings - shiny Noiseblocker NB-BlackSilentPro PK-1 140mm x 25m... Noiseblocker NB-Multiframe M12-S1 120mmx25mm Ul... EK-Supreme HF - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
Lamptron FC4 Lamptron FC8 EK GeForce 680 GTX VGA Liquid Cooling Block EK GeForce 680 GTX VGA Liquid Cooling Block 
CoolingCoolingCoolingCooling
EK GeForce 680 GTX VGA Liquid Cooling Block EK-FC680 GTX Backplate EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) Watercool MO-RA3 4 x 180mm PRO Extreme Radiator... 24v PMP-450S 
CoolingCoolingCoolingCooling
24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
CoolingOSMonitorMonitor
Koolance Quick Disconnect VL3N Windows 7 x64 Asus VG278H 27-Inch LED 3D Monitor Asus VG278H 27-Inch LED 3D Monitor 
MonitorKeyboardPowerCase
Asus VG278H 27-Inch LED 3D Monitor Microsoft wireless Silverstone ST1500 CaseLabs M10 and Pedestal 
MouseMouse PadAudioAudio
Razer Naga Epic Razer Megasoma Sennheiser PC360 FiiO E10 Headphone DAC/Amp 
OtherOtherOtherOther
Simcraft Apex 3 GT Motion Simulator CubeControls N35 Wheel + Quick Release CubeControls Cube GT Wheel + Quick Release CubeControls SLI-Box 
OtherOtherOtherOther
CST Gated Shifter DSD Sequential Shifter Bodnar FFB Wheel Hydraulic Tilton 600 Series Pedals 
OtherOther
Cobra Technology Evolution Pro Outlast Carbon F... CubeControls Formula Momo Wheel + Quick Release 
  hide details  
Reply
 
Sim Gear
(10 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Core i7 3820 RAMPAGE IV EXTREME EVGA GeForce GTX 680 SC+ w/Backplate EVGA GeForce GTX 680 SC+ w/Backplate 
GraphicsRAMHard DriveOptical Drive
EVGA GeForce GTX 680 SC+ w/Backplate CORSAIR DOMINATOR GT 16GB  Samsung 830 Pioneer BDR-206DBK 12x Internal Blu-ray Disc/DV... 
CoolingCoolingCoolingCooling
Bitspower Compression fittings - shiny Noiseblocker NB-BlackSilentPro PK-1 140mm x 25m... Noiseblocker NB-Multiframe M12-S1 120mmx25mm Ul... EK-Supreme HF - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
Lamptron FC4 Lamptron FC8 EK GeForce 680 GTX VGA Liquid Cooling Block EK GeForce 680 GTX VGA Liquid Cooling Block 
CoolingCoolingCoolingCooling
EK GeForce 680 GTX VGA Liquid Cooling Block EK-FC680 GTX Backplate EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) 
CoolingCoolingCoolingCooling
EK-FC680 GTX Backplate EK-RAM Dominator - Acetal+EN (Nickel) Watercool MO-RA3 4 x 180mm PRO Extreme Radiator... 24v PMP-450S 
CoolingCoolingCoolingCooling
24v PMP-450S RP-45X2 version 2.0 CTR-SPD24X2 Dual 24V Pump Controller Primochill LRT 1/2" x 3/4" 
CoolingOSMonitorMonitor
Koolance Quick Disconnect VL3N Windows 7 x64 Asus VG278H 27-Inch LED 3D Monitor Asus VG278H 27-Inch LED 3D Monitor 
MonitorKeyboardPowerCase
Asus VG278H 27-Inch LED 3D Monitor Microsoft wireless Silverstone ST1500 CaseLabs M10 and Pedestal 
MouseMouse PadAudioAudio
Razer Naga Epic Razer Megasoma Sennheiser PC360 FiiO E10 Headphone DAC/Amp 
OtherOtherOtherOther
Simcraft Apex 3 GT Motion Simulator CubeControls N35 Wheel + Quick Release CubeControls Cube GT Wheel + Quick Release CubeControls SLI-Box 
OtherOtherOtherOther
CST Gated Shifter DSD Sequential Shifter Bodnar FFB Wheel Hydraulic Tilton 600 Series Pedals 
OtherOther
Cobra Technology Evolution Pro Outlast Carbon F... CubeControls Formula Momo Wheel + Quick Release 
  hide details  
Reply
post #6 of 6
It should work fine. Just be sure to test it out a bit before making the setup permanent.
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WD Caviar Black Gentle Typhoon AP-15 Alphacool Cape Corp Coolpex Pro 50LT XSPC EX480 
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Primochill PrimoFlex 7/16x5/8 EK Compression Fittings XSPC EX420 Koolance CPU-380I Water Block 
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120.4 (480) Radiator Side Mount - Merlin Pedestal 120.4 (480) Radiator Side Mount - Merlin Pedestal 140.3 (420) Radiator Side Mount - Merlin Pedestal 140.3 (420) Radiator Side Mount - Merlin Pedestal 
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CPUMotherboardGraphicsRAM
i7-6900K Asus ROG Rampage V Edition 10 R9 Fury X Crucial Ballistix 
Hard DriveHard DriveHard DriveHard Drive
WD Caviar Black WD Caviar Black Mushkin Reactor Mushkin Reactor 
Hard DriveCoolingCoolingCooling
WD Caviar Black Gentle Typhoon AP-15 Alphacool Cape Corp Coolpex Pro 50LT XSPC EX480 
CoolingCoolingCoolingCooling
Primochill PrimoFlex 7/16x5/8 EK Compression Fittings XSPC EX420 Koolance CPU-380I Water Block 
CoolingCoolingCoolingCooling
Bitspower 90 Degree Angle Fittings XSPC EX420 VPP655 Corsair Air Series SP140 
CoolingOSMonitorKeyboard
PMP-450S Windows 10 Monoprice 4k Ducky DK9008G2 
PowerCaseOtherOther
Corsair AX1200i CaseLabs Merlin ST10 CaseLabs Merlin ST10 Pedestal CaseLabs Merlin ST10 Pedestal 
OtherOtherOtherOther
120.4 (480) Radiator Side Mount - Merlin Pedestal 120.4 (480) Radiator Side Mount - Merlin Pedestal 140.3 (420) Radiator Side Mount - Merlin Pedestal 140.3 (420) Radiator Side Mount - Merlin Pedestal 
Other
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