Overclock.net › Forums › Cooling › Air Cooling › Single 120mm fan: Push or Pull on Hyper 212+ in Lian Li PC-A05?
New Posts  All Forums:Forum Nav:

Single 120mm fan: Push or Pull on Hyper 212+ in Lian Li PC-A05?

post #1 of 12
Thread Starter 
I just recently ordered a Lian Li PC-A05 and have a question about the cooling setup in this case.

I'm planning to use an S-Flex undervolted to about 1000 RPM for the rear intake, and since the rear intake fan is only about 3 inches away from the CPU cooler anyway, would it be better to use the heatsink's fan as pull instead of push?

Essentially, like this (rear intake pushing air towards heatsink, heatsink fan pulling air away)

pclg0.jpg
Edited by 996gt2 - 5/30/11 at 11:55pm
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
post #2 of 12
Push will be more effective on the cpu heatsink.
post #3 of 12
Thread Starter 
Quote:
Originally Posted by eggs2see;13695768 
Push will be more effective on the cpu heatsink.

Even if there is a rear intake fan that's only a few inches away from the intake side of the heatsink?
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
post #4 of 12
Push on the heatsink, exhaust on the rear fan. The pic in your post is pushing air in the heatsink and the rear fan is exhaust.
post #5 of 12
Quote:
Originally Posted by gymenii;13695823 
Push on the heatsink, exhaust on the rear fan. The pic in your post is pushing air in the heatsink and the rear fan is exhaust.

what? no.

in his pic both fans are pointing the right way

--

I have the same case OP, and I found I had better temps pushing even with the rear fan right next to the heatsink. You can try both yourself and see which one is better for you.

edit: also feel free to come and join our A05 club (see link in my sig).
Edited by sexybastard - 5/31/11 at 12:18am
post #6 of 12
Thread Starter 
Quote:
Originally Posted by gymenii;13695823 
Push on the heatsink, exhaust on the rear fan. The pic in your post is pushing air in the heatsink and the rear fan is exhaust.

No, airflow in the PC-A05 is backwards compared to a normal case because the motherboard is inverted. Look at the rear fan. The back side (with the motor supports) is clearly facing the heatsink, meaning that fan is serving as intake. Same with the heatsink fan...the side with the fan motor supports can be seen, meaning that heatsink fan is pulling air away from the heatsink.

My question is, would such a setup be better than using the rear fan as intake and the heatsink fan in a push configuration (with both fans being very close to each other)?
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
post #7 of 12
Thread Starter 
Quote:
Originally Posted by sexybastard;13695838 
what? no.

in his pic both fans are pointing the right way (pushing)

--

I have the same case OP, and I found I had better temps pushing even with the rear fan right next to the heatsink. You can try both yourself and see which one is better for you.

edit: also feel free to come and join our A05 club (see link in my sig).

Thanks, I'll try push on the heatsink fan and see how the temps are.

I'll join the club once I finish transferring my build to the new case and get some pics up!
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
post #8 of 12
Quote:
Originally Posted by 996gt2;13695839 
No, airflow in the PC-A05 is backwards compared to a normal case because the motherboard is inverted. Look at the rear fan. The back side (with the motor supports) is clearly facing the heatsink, meaning that fan is serving as intake. Same with the heatsink fan...the side with the fan motor supports can be seen, meaning that heatsink fan is pulling air away from the heatsink.

My question is, would such a setup be better than using the rear fan as intake and the heatsink fan in a push configuration (with both fans being very close to each other)?

You are right, sorry never mind.
Edited by gymenii - 5/31/11 at 11:34am
post #9 of 12
I'm curious what you ended up doing, I pulled up this thread from google looking to see how I should arrange my single fan, then I kinda laughed at myself because I already know the answer... I just didn't try to think for even a second.

What's going to matter most from a heat transfer perspective is the speed of the air between the fins. So which configuration will give you the greatest air speed? The rear fan (if in an intake configuration) will hit the fins with air which will dissipate and become turbulent, and not flow through the fins very fast. Also.. not all of the air will actually pass over the fins. This is because its separated from the heatsink by a good distance, and air coming out of these fans doesn't travel in a laser-straight path like we'd like to hope.

Of course, there's a fan on the other side that can pull the air right? Problem is the situation is very different ... it will indeed pull but think about the actual design of the fan and the heatsink. First, the fins are open on the sides as well as the rear... this means your "pull" fan will pull air through the sides and the rear which ends up meaning the fresh air will pass over less surface area of the fins. (surface area is everything in heat transfer, and convection is one of the best methods of transferring heat, so you want to maximize both... hence huge fans and heatsinks with a bazillion fins in our rigs).

Conversely if your heatsink fan is pushing air through, most of it will get directed ---> through the heatsink in one path, and it will be moving as fast as possible, and the rear fan can exhaust the air to recycle it. It's more important to have the air moving fast (heatsink fan pushing, rear fan pulling/exhausting) through the fins than it is to have a cool ambient temperature (heatsink fan pulling/exhausting, rear fan pushing fresh air into the case).

By the way, this is how the Hyper 212 comes in the packaging. It's set up to push air into it.

(last thought: the different configurations may not make a massive difference in the end, but in the question of which is better I would expect what i said above to hold)
Edited by donkrx - 7/25/11 at 7:52pm
    
CPUMotherboardGraphicsRAM
i5-2500K [24/7: 4.9ghz 1.47v] ASRock P67 Extreme 4 (B3) EVGA Geforce 570 [890/2200 1.1v] G.Skill Ripjaws 2x4GB 1600Mhz 
Hard DriveMonitorPowerCase
WD Caviar Black 1TB HP f2105 1680x1050 Corsair TX750 V2 (backup Antec BP550W) Antec 902 
Mouse
Logitech G500 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-2500K [24/7: 4.9ghz 1.47v] ASRock P67 Extreme 4 (B3) EVGA Geforce 570 [890/2200 1.1v] G.Skill Ripjaws 2x4GB 1600Mhz 
Hard DriveMonitorPowerCase
WD Caviar Black 1TB HP f2105 1680x1050 Corsair TX750 V2 (backup Antec BP550W) Antec 902 
Mouse
Logitech G500 
  hide details  
Reply
post #10 of 12
Thread Starter 
Quote:
Originally Posted by donkrx;14346950 
I'm curious what you ended up doing, I pulled up this thread from google looking to see how I should arrange my single fan, then I kinda laughed at myself because I already know the answer... I just didn't try to think for even a second.

What's going to matter most from a heat transfer perspective is the speed of the air between the fins. So which configuration will give you the greatest air speed? The rear fan (if in an intake configuration) will hit the fins with air which will dissipate and become turbulent, and not flow through the fins very fast. Also.. not all of the air will actually pass over the fins. This is because its separated from the heatsink by a good distance, and air coming out of these fans doesn't travel in a laser-straight path like we'd like to hope.

Of course, there's a fan on the other side that can pull the air right? Problem is the situation is very different ... it will indeed pull but think about the actual design of the fan and the heatsink. First, the fins are open on the sides as well as the rear... this means your "pull" fan will pull air through the sides and the rear which ends up meaning the fresh air will pass over less surface area of the fins. (surface area is everything in heat transfer, and convection is one of the best methods of transferring heat, so you want to maximize both... hence huge fans and heatsinks with a bazillion fins in our rigs).

Conversely if your heatsink fan is pushing air through, most of it will get directed ---> through the heatsink in one path, and it will be moving as fast as possible, and the rear fan can exhaust the air to recycle it. It's more important to have the air moving fast (heatsink fan pushing, rear fan pulling/exhausting) through the fins than it is to have a cool ambient temperature (heatsink fan pulling/exhausting, rear fan pushing fresh air into the case).

By the way, this is how the Hyper 212 comes in the packaging. It's set up to push air into it.

(last thought: the different configurations may not make a massive difference in the end, but in the question of which is better I would expect what i said above to hold)

I ended up getting an NH-D14 and haven't looked back since lol.

Max load temps with the D14 are between 10 and 12C lower than they were with the Hyper 212+, even when 2 fans were used on the 212+.
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
5 GHz SFF Box
(18 items)
 
   
CPUMotherboardGraphicsRAM
Core i7-2700K @ 5.0 GHz, 1.38V Asus Maximus IV GENE Asus GTX 670 DC II 4x4GB Samsung 30nm @ DDR3-2133 9-9-9-21 1.5V 
Hard DriveHard DriveHard DriveHard Drive
Plextor M3 SSD WD Velociraptor 500GB WD Caviar Black 1TB WD Caviar Green 2TB 
CoolingOSMonitorKeyboard
Thermalright HR-02 (GT AP-15 Push/Pull) Windows 7 Pro x64 LG 27" 2560x1440 S-IPS (Calibrated with Eye-One) CM Quickfire Rapid 
PowerCaseMouseMouse Pad
Seasonic X-750 Silverstone SG09 Logitech MX518 Steelseries QcK 
Audio
Asus Xonar DX + Shure SRH840 
CPUMotherboardRAMHard Drive
Core i5-3570K Gigabyte H61N-USB3 Mini-ITX 2x4GB Samsung 30nm DDR3 Samsung 830 128GB SSD 
Hard DriveOSPowerCase
WD Scorpio Blue 500GB Win 7 Pro x64 Antec 90W DC-DC/Delta power brick Antec ISK 110 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › Single 120mm fan: Push or Pull on Hyper 212+ in Lian Li PC-A05?