Overclock.net › Forums › Cooling › Water Cooling › how are 2 fans stick together in pushing at the same direction performance ?
New Posts  All Forums:Forum Nav:

how are 2 fans stick together in pushing at the same direction performance ?

post #1 of 11
Thread Starter 
Hi guys , I just saw some one put 2 fans stick together in pushing at the same direction , so I'm wondering how is their performance ? The fan put like this :

449


+So Is it better than [1 fan push] Or [Push/Pull] ?

Thanks
post #2 of 11
it is actually worse, he is most likely using one of the fans as a shroud (meaning no actual fan in there, just the external body
    
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 SLI GTX 480 8gb Mushkin DDR3 1333 
Hard DriveCoolingOSMonitor
OCZ agility 120gb Hyper 212 Win 7 Pro x64 PX 2710MW 
PowerCase
Silverstone ST75F-P 750W CM 692 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 SLI GTX 480 8gb Mushkin DDR3 1333 
Hard DriveCoolingOSMonitor
OCZ agility 120gb Hyper 212 Win 7 Pro x64 PX 2710MW 
PowerCase
Silverstone ST75F-P 750W CM 692 
  hide details  
Reply
post #3 of 11
Looks to me like it's push/pull but the push has a shroud to eliminate the fans natural dead-spot. (which isn't necessary on the "pull" fan)
Compuhorse
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 2600k Asus P67 Sabertooth EVGA GTX 780ti CLASSIFIED Corsair Vengeance 8gb 
Hard DriveOptical DriveCoolingOS
Samsung 512gb 840 PRO LG Bluray burner Corsair Hydro H80i Windows 8.1 PRO 
MonitorKeyboardPowerCase
Asus 27" 2560x1440 CORSAIR K95 Mechanical Seasonic 1000w Platinum Corsair 600T Arctic White 
MouseMouse PadAudio
Logitech G502 Proteus MIONIX Propus Creative X-FI HD 
  hide details  
Reply
Compuhorse
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 2600k Asus P67 Sabertooth EVGA GTX 780ti CLASSIFIED Corsair Vengeance 8gb 
Hard DriveOptical DriveCoolingOS
Samsung 512gb 840 PRO LG Bluray burner Corsair Hydro H80i Windows 8.1 PRO 
MonitorKeyboardPowerCase
Asus 27" 2560x1440 CORSAIR K95 Mechanical Seasonic 1000w Platinum Corsair 600T Arctic White 
MouseMouse PadAudio
Logitech G502 Proteus MIONIX Propus Creative X-FI HD 
  hide details  
Reply
post #4 of 11
Push/pull is the best one on top the rad and one one the bottom
My System
(27 items)
 
  
CPUMotherboardGraphicsGraphics
AMD Phenom II X6 1100T Crosshair V Formula NVIDIA GeForce GTX 580 NVIDIA GeForce GTX 580 
RAMRAMRAMRAM
G.Skill G.Skill G.Skill G.Skill 
Hard DriveHard DriveOptical DriveOS
Crucial M4 2.5" 256GB SATA III MLC Internal Sol... Western Digital Caviar Black WD1002FAEX 1TB 720... SONY Black 12X BD-R 2X BD-RE 8X DVD+R 5X DVD-RA... Microsoft Windows 7 Ultimate SP1 64-bit 
MonitorKeyboardPowerCase
HP LED Black 27" 5ms HDMI Widescreen LED BackLi... Logitech G510 Black 18 Function Keys USB Wired ... SILVERSTONE ST1500 1500W ATX 12V 2.3 & EPS 12V ... XSPC H1 Hive Series Cube Enthusiast Water Cooli... 
MouseMouse PadAudioOther
Logitech G500 10 Buttons Dual-mode Scroll Wheel... Ozone Gaming Gear GROUND LEVEL L Gaming Mouse Pad Cooler Master Circumaural Storm Sirus Headset -... XSPC Dual 5.25" Bay Reservoir - w/ Alphacool VP... 
OtherOtherOtherOther
XSPC Dual 5.25" Bay Reservoir - w/ Alphacool VP... XSPC EX360 Triple 120mm Low Profile Split Fin R... XSPC EX360 Triple 120mm Low Profile Split Fin R... XSPC EX360 Triple 120mm Low Profile Split Fin R... 
OtherOtherOther
XSPC EX360 Triple 120mm Low Profile Split Fin R... EK ASUS Crosshair V Full Board Cooling Block Ki... EK Supreme HF Universal CPU Liquid Cooling Bloc... 
  hide details  
Reply
My System
(27 items)
 
  
CPUMotherboardGraphicsGraphics
AMD Phenom II X6 1100T Crosshair V Formula NVIDIA GeForce GTX 580 NVIDIA GeForce GTX 580 
RAMRAMRAMRAM
G.Skill G.Skill G.Skill G.Skill 
Hard DriveHard DriveOptical DriveOS
Crucial M4 2.5" 256GB SATA III MLC Internal Sol... Western Digital Caviar Black WD1002FAEX 1TB 720... SONY Black 12X BD-R 2X BD-RE 8X DVD+R 5X DVD-RA... Microsoft Windows 7 Ultimate SP1 64-bit 
MonitorKeyboardPowerCase
HP LED Black 27" 5ms HDMI Widescreen LED BackLi... Logitech G510 Black 18 Function Keys USB Wired ... SILVERSTONE ST1500 1500W ATX 12V 2.3 & EPS 12V ... XSPC H1 Hive Series Cube Enthusiast Water Cooli... 
MouseMouse PadAudioOther
Logitech G500 10 Buttons Dual-mode Scroll Wheel... Ozone Gaming Gear GROUND LEVEL L Gaming Mouse Pad Cooler Master Circumaural Storm Sirus Headset -... XSPC Dual 5.25" Bay Reservoir - w/ Alphacool VP... 
OtherOtherOtherOther
XSPC Dual 5.25" Bay Reservoir - w/ Alphacool VP... XSPC EX360 Triple 120mm Low Profile Split Fin R... XSPC EX360 Triple 120mm Low Profile Split Fin R... XSPC EX360 Triple 120mm Low Profile Split Fin R... 
OtherOtherOther
XSPC EX360 Triple 120mm Low Profile Split Fin R... EK ASUS Crosshair V Full Board Cooling Block Ki... EK Supreme HF Universal CPU Liquid Cooling Bloc... 
  hide details  
Reply
post #5 of 11
Thread Starter 
thanks but Do they give me more air flow if I stick 2 real working fans like that ?

Thanks
post #6 of 11
a quote from martins fan tests
http://martinsliquidlab.petrastech.com/Radiator-Fan-Orientation-And-Shroud-Testing-Review.html

2 fans Push/Pull vs others - It was very clear that when using two fans per radiator section, that the radiator intself acts as a flow spreader and provided great benefit to straightening out the air for the second fan in a push/pull configuration. Just like doubling up with a pump, there is a pressure benefit to doubling up on fans and this translates to about a 20-30% performance gain. The added fan pressure simply means and added gain in air flow and corresponding performance. None of the experimental pull/pull or push/push configurations provided any noteworthy benefit as it seams the air is simply too disturbed from the first fan to allow the second to perform properly when air is moving. I would always recommend a push/pull configuration for two fans and add a shroud to both sides if space allows.
swimming haf-x
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k 4.7 1.37 v asus p8p67 deluxe vtx3d black HD 7870 kiningston hyper x 1600 
Hard DriveCoolingCoolingOS
hitachi xspc raystorm phobya 360 Ek-vga Bridge edition  windows 7 ultimate 
MonitorPowerCaseMouse
aoc 23.5" mushkin joules 800w coolermaster HaF-X gigabyte 
  hide details  
Reply
swimming haf-x
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k 4.7 1.37 v asus p8p67 deluxe vtx3d black HD 7870 kiningston hyper x 1600 
Hard DriveCoolingCoolingOS
hitachi xspc raystorm phobya 360 Ek-vga Bridge edition  windows 7 ultimate 
MonitorPowerCaseMouse
aoc 23.5" mushkin joules 800w coolermaster HaF-X gigabyte 
  hide details  
Reply
post #7 of 11
Quote:
Originally Posted by Greenback View Post

a quote from martins fan tests
http://martinsliquidlab.petrastech.com/Radiator-Fan-Orientation-And-Shroud-Testing-Review.html
2 fans Push/Pull vs others - It was very clear that when using two fans per radiator section, that the radiator intself acts as a flow spreader and provided great benefit to straightening out the air for the second fan in a push/pull configuration. Just like doubling up with a pump, there is a pressure benefit to doubling up on fans and this translates to about a 20-30% performance gain. The added fan pressure simply means and added gain in air flow and corresponding performance. None of the experimental pull/pull or push/push configurations provided any noteworthy benefit as it seams the air is simply too disturbed from the first fan to allow the second to perform properly when air is moving. I would always recommend a push/pull configuration for two fans and add a shroud to both sides if space allows.

Adding a shroud to the push fan adds about 3-4% performance gain from what I've seen around. (I'll have to find the sauce for you)

Altho, it's been proven time and time again that a shroud on the pull fan is pointless as the dead-spot doesn't affect it as much due to the fact it's only really assisting the push fans static pressure.

Altho, from what I'm gathering from the OP, he wants to know if 2 functioning fans together would increase performance. Which I can't answer as I've never tried it. Logics tell me no it wouldn't help. Or if it did, it wouldn't be worth the additional noise created from a fan blowing air into another fans moving blades. *shudders the thought*
Compuhorse
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 2600k Asus P67 Sabertooth EVGA GTX 780ti CLASSIFIED Corsair Vengeance 8gb 
Hard DriveOptical DriveCoolingOS
Samsung 512gb 840 PRO LG Bluray burner Corsair Hydro H80i Windows 8.1 PRO 
MonitorKeyboardPowerCase
Asus 27" 2560x1440 CORSAIR K95 Mechanical Seasonic 1000w Platinum Corsair 600T Arctic White 
MouseMouse PadAudio
Logitech G502 Proteus MIONIX Propus Creative X-FI HD 
  hide details  
Reply
Compuhorse
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 2600k Asus P67 Sabertooth EVGA GTX 780ti CLASSIFIED Corsair Vengeance 8gb 
Hard DriveOptical DriveCoolingOS
Samsung 512gb 840 PRO LG Bluray burner Corsair Hydro H80i Windows 8.1 PRO 
MonitorKeyboardPowerCase
Asus 27" 2560x1440 CORSAIR K95 Mechanical Seasonic 1000w Platinum Corsair 600T Arctic White 
MouseMouse PadAudio
Logitech G502 Proteus MIONIX Propus Creative X-FI HD 
  hide details  
Reply
post #8 of 11
Quote:
Originally Posted by batista11b5 View Post

thanks but Do they give me more air flow if I stick 2 real working fans like that ?
Thanks

no
    
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 SLI GTX 480 8gb Mushkin DDR3 1333 
Hard DriveCoolingOSMonitor
OCZ agility 120gb Hyper 212 Win 7 Pro x64 PX 2710MW 
PowerCase
Silverstone ST75F-P 750W CM 692 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5 760 EVGA P55 SLI GTX 480 8gb Mushkin DDR3 1333 
Hard DriveCoolingOSMonitor
OCZ agility 120gb Hyper 212 Win 7 Pro x64 PX 2710MW 
PowerCase
Silverstone ST75F-P 750W CM 692 
  hide details  
Reply
post #9 of 11
Delta has some fans that are essentially two fans stuck together. Aircraft (turbines and some helicopter rotors) use this principle as well. So in theory it works.

BUT, here's the important part, when all of those systems are designed to work in that way. Computer fans were never designed to be stacked on top of each other and doing so nets no benefits.

For a system like this to work, the blades need to be properly timed, sized, and shaped to complement each other, not imitate.
Arcane
(33 items)
 
Sanctum
(9 items)
 
Fukurou
(15 items)
 
CPUMotherboardGraphicsGraphics
Core i7 980x GIGABYTE GA-EX58-UD5 MSI RX 480 GAMING X 4GB MSI GeForce GTX 680 Lightning 
RAMHard DriveHard DriveHard Drive
Kingston HyperX T1 Intel X25-M WD Caviar Black FASS Plextor M5S 
Hard DriveHard DriveOptical DriveOptical Drive
WD Velociraptor WD Caviar Black FALS Sony DVD Burner w/ Lightscribe LG Bluray + HDDVD 
CoolingCoolingCoolingOS
Black Ice GTX 360 Black Ice GTX 240 Panaflo High Speed - Push-Pull w/ shrouds Windows 7 Pro (64) 
OSMonitorMonitorKeyboard
Ubuntu (64) X-Star DP2710 ASUS VK266H Black 25.5" 2ms LCD X-Armor U9BL (Mech) 
PowerCaseMouseMouse Pad
EVGA 1000 P2 Cooler Master HAF 932 Razer Deathadder Chroma Cougar Control 
AudioAudioAudioAudio
ATH-A900X Maudio AV-40 Polk PSW-10 Zalman Mic-1 (Clip-on Mic) 
AudioOtherOtherOther
Sound Blaster X7 LE Logitech G13 Wacom Intuos 3 Scythe "3-Foot Switch" 
Other
Modded PS4, PS3, Xbox 360, and Logitech PC Cont... 
CPUMotherboardGraphicsRAM
Ryzen 7 1700 MSI B350M Mortar Arctic GTX 560ti DirectCU II G.Skill TridentZ  
Hard DriveHard DriveOSPower
Samsung EVO 960 Consatellation Windows 10 Pro Corsair HX 1050 
Case
Raijintek Aeneas White Window 
CPUMotherboardRAMHard Drive
Core i5-661 GA-H55-USB3 12GB DDR3 1333 WD Caviar Black AALS 640GB 
Hard DriveHard DriveOptical DriveCooling
WD Caviar Green EARS 2TB Vertex Turbo 60GB (SSD) Samsung Blu-ray, Samsung DVD Burner H50 (With push/pull nocturas) 
OSMonitorKeyboardPower
Windows 10 Professional 64 LG 47inch LED LCD Saitek Eclipse Lite-touch Wireless Seasonic X750 Gold 
CaseAudio
CM690 II Passive bookshelfspeakers + amp. 
  hide details  
Reply
Arcane
(33 items)
 
Sanctum
(9 items)
 
Fukurou
(15 items)
 
CPUMotherboardGraphicsGraphics
Core i7 980x GIGABYTE GA-EX58-UD5 MSI RX 480 GAMING X 4GB MSI GeForce GTX 680 Lightning 
RAMHard DriveHard DriveHard Drive
Kingston HyperX T1 Intel X25-M WD Caviar Black FASS Plextor M5S 
Hard DriveHard DriveOptical DriveOptical Drive
WD Velociraptor WD Caviar Black FALS Sony DVD Burner w/ Lightscribe LG Bluray + HDDVD 
CoolingCoolingCoolingOS
Black Ice GTX 360 Black Ice GTX 240 Panaflo High Speed - Push-Pull w/ shrouds Windows 7 Pro (64) 
OSMonitorMonitorKeyboard
Ubuntu (64) X-Star DP2710 ASUS VK266H Black 25.5" 2ms LCD X-Armor U9BL (Mech) 
PowerCaseMouseMouse Pad
EVGA 1000 P2 Cooler Master HAF 932 Razer Deathadder Chroma Cougar Control 
AudioAudioAudioAudio
ATH-A900X Maudio AV-40 Polk PSW-10 Zalman Mic-1 (Clip-on Mic) 
AudioOtherOtherOther
Sound Blaster X7 LE Logitech G13 Wacom Intuos 3 Scythe "3-Foot Switch" 
Other
Modded PS4, PS3, Xbox 360, and Logitech PC Cont... 
CPUMotherboardGraphicsRAM
Ryzen 7 1700 MSI B350M Mortar Arctic GTX 560ti DirectCU II G.Skill TridentZ  
Hard DriveHard DriveOSPower
Samsung EVO 960 Consatellation Windows 10 Pro Corsair HX 1050 
Case
Raijintek Aeneas White Window 
CPUMotherboardRAMHard Drive
Core i5-661 GA-H55-USB3 12GB DDR3 1333 WD Caviar Black AALS 640GB 
Hard DriveHard DriveOptical DriveCooling
WD Caviar Green EARS 2TB Vertex Turbo 60GB (SSD) Samsung Blu-ray, Samsung DVD Burner H50 (With push/pull nocturas) 
OSMonitorKeyboardPower
Windows 10 Professional 64 LG 47inch LED LCD Saitek Eclipse Lite-touch Wireless Seasonic X750 Gold 
CaseAudio
CM690 II Passive bookshelfspeakers + amp. 
  hide details  
Reply
post #10 of 11
Quote:
Originally Posted by Nicnivian View Post

Adding a shroud to the push fan adds about 3-4% performance gain from what I've seen around. (I'll have to find the sauce for you)
Altho, it's been proven time and time again that a shroud on the pull fan is pointless as the dead-spot doesn't affect it as much due to the fact it's only really assisting the push fans static pressure.
Altho, from what I'm gathering from the OP, he wants to know if 2 functioning fans together would increase performance. Which I can't answer as I've never tried it. Logics tell me no it wouldn't help. Or if it did, it wouldn't be worth the additional noise created from a fan blowing air into another fans moving blades. *shudders the thought*

if you look down there is a comparison with push+shroud and pull +shroud and on 120mm fans it's better to go pull +shroud then push on 38mm it's other way round
swimming haf-x
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k 4.7 1.37 v asus p8p67 deluxe vtx3d black HD 7870 kiningston hyper x 1600 
Hard DriveCoolingCoolingOS
hitachi xspc raystorm phobya 360 Ek-vga Bridge edition  windows 7 ultimate 
MonitorPowerCaseMouse
aoc 23.5" mushkin joules 800w coolermaster HaF-X gigabyte 
  hide details  
Reply
swimming haf-x
(15 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k 4.7 1.37 v asus p8p67 deluxe vtx3d black HD 7870 kiningston hyper x 1600 
Hard DriveCoolingCoolingOS
hitachi xspc raystorm phobya 360 Ek-vga Bridge edition  windows 7 ultimate 
MonitorPowerCaseMouse
aoc 23.5" mushkin joules 800w coolermaster HaF-X gigabyte 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › how are 2 fans stick together in pushing at the same direction performance ?