Overclock.net › Forums › Cooling › Air Cooling › Why are my case fans not spinning?
New Posts  All Forums:Forum Nav:

Why are my case fans not spinning?

post #1 of 3
Thread Starter 
I recently built a tidy small compact gaming rig into Corsair's new Obsidian 350D.

All was fine until I decided to get some fans for it as it only came with 2 120mm fans for the back and front. I replaced the front intake fans with 140mm bitfenix Spectre fans which have FDBs as I wanted the PC to be as quiet as possible. Going with the quiet theme as well as having a BeQuiet! PSU and CPU cooler I replaced the back 120mm and top 2 140mm fans all with BeQuiet! Shadow wings.

The motherboard is an mATX board and as a result has 3 fan headers. The top 2 fans are connected to one header via a 2 way adapter as are the front 2. The top 2 and the rear 120mm do spin up, well the do very slightly but there seems to never be enough power to get them to go as they try to spin for a brief second, with slight juddering and then give up and stop. The front 2 are fine and spin with no problems.

After a while of having my PC on I notice that they are spinning fine, very slowly but fine. Why do they not spin initially? (This probably last for a few hours or until I play a game)
post #2 of 3
It sounds like it's struggling to get the power to initially spin them.

What happens if you only connect one fan to the header, instead of 2?
Animus
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 3770K Asus Maximus V Formula Z77 EVGA GTX980Ti SC+ ACX 2.0+ 2 x 4GB Corsair Dominator GT 1866Mhz 
Hard DriveHard DriveCoolingCooling
Samsung 840 Pro 128GB 2 x WD 1TB Blue EZEX RAID0 EK Supremacy - Copper / Acetal EK Titan X & Backplate - Copper / Acetal 
CoolingCoolingCoolingCooling
EK 360XTX EK Spin Reservoir - Acetal Liang DDC / EK Top EK PSC Compression Fittings 
OSMonitorKeyboardPower
Windows 7 Professional 64bit 3 x Samsung P2450H 24" Filco Majestouch 2 - Cherry Blues Corsair TX750 
CaseMouseMouse PadAudio
Corsair 800D Razer Deathadder 2013 Razer Destructor 2 Creative Titanium HD 
AudioAudio
Fiio E9 Amplifier Beyerdynamic DT880 Premium (600 Ohm) 
  hide details  
Reply
Animus
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 3770K Asus Maximus V Formula Z77 EVGA GTX980Ti SC+ ACX 2.0+ 2 x 4GB Corsair Dominator GT 1866Mhz 
Hard DriveHard DriveCoolingCooling
Samsung 840 Pro 128GB 2 x WD 1TB Blue EZEX RAID0 EK Supremacy - Copper / Acetal EK Titan X & Backplate - Copper / Acetal 
CoolingCoolingCoolingCooling
EK 360XTX EK Spin Reservoir - Acetal Liang DDC / EK Top EK PSC Compression Fittings 
OSMonitorKeyboardPower
Windows 7 Professional 64bit 3 x Samsung P2450H 24" Filco Majestouch 2 - Cherry Blues Corsair TX750 
CaseMouseMouse PadAudio
Corsair 800D Razer Deathadder 2013 Razer Destructor 2 Creative Titanium HD 
AudioAudio
Fiio E9 Amplifier Beyerdynamic DT880 Premium (600 Ohm) 
  hide details  
Reply
post #3 of 3
could be a bios setting for voltage-controlling the fan. try connecting them directly to the PSU to see the max speed
Hummingbird
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel® Core i5-2500K, 3.30 GHz EVGA Z68 FTW E-ATX Sapphire Radeon HD 6950, 2GB DiRT 3 Edition G.SKILL Ripjaws X Series 2 x 4GB - 2133 (PC3 17... 
Hard DriveHard DriveCoolingOS
Seagate Barracuda 2 TB Crucial M4 128 GB SSD  Corsair H80 Windows 8 6bit 
MonitorPowerCaseAudio
Asus VH238H Black 23" Full HD HDMI LED Backligh... Seasonic x860 Corsair Carbide 500R Logitech X-540 5.1 Surround Sound 
  hide details  
Reply
Hummingbird
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel® Core i5-2500K, 3.30 GHz EVGA Z68 FTW E-ATX Sapphire Radeon HD 6950, 2GB DiRT 3 Edition G.SKILL Ripjaws X Series 2 x 4GB - 2133 (PC3 17... 
Hard DriveHard DriveCoolingOS
Seagate Barracuda 2 TB Crucial M4 128 GB SSD  Corsair H80 Windows 8 6bit 
MonitorPowerCaseAudio
Asus VH238H Black 23" Full HD HDMI LED Backligh... Seasonic x860 Corsair Carbide 500R Logitech X-540 5.1 Surround Sound 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › Why are my case fans not spinning?