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Fan Controller LED Issue

post #1 of 2
Thread Starter 
Hey guys.
Wanted to add 2 more case fans for intake and was out of fan headers on my mobo so I decided to try a fan controller for the first time.
Bought the ThermalTake Commander F5 because it's simple, cheap and matches my color scheme.

Install in the Scout 2 Advanced case left it feeling a tiny bit loose in the drive bay which annoys me but I will probably mod it if I decide to keep it to make it a bit more solid.

My main issue is that the two LED fans I hooked up to it seem to fluctuate in brightness (but not speed, as far as my ear can tell) every few minutes. They "rest" at a certain level and then get brighter for about 5-10 seconds and then back to normal. Also the one fan is noticeable dimmer than the other all of the time, unless I crank the speed of that one all the way up and leave the other one all the way down.

They aren't great fans, so maybe that's part of it, but if it's just that this controller sucks I need to know as I only have another 2 days to return it.

Opinions or suggestions on things to try?

Thanks guys.
post #2 of 2
Most fan controllers use undervolting / voltage modulation to control fans.. so you will see some differences in the LEDs, as LEDs need a constant power source to maintain constant output.

I am assuming that the other fans that are on your mobo, are PWM controlled?

That controller is pretty low end... and apparently is known to have different voltages per channel, instead of being consistent across the board. That is probably why you are seeing the differences in fan / LED output. It also doesn't have full 12V output to your fans. See link below:

http://www.tweaktown.com/reviews/5776/thermaltake-commander-f5-fan-controller-review/index.html
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INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
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Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
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Workstation
(16 items)
 
   
CPUMotherboardGraphicsGraphics
INtel 4770k ASUS maximus extreme VI  EVGA GTX 780Ti SC  EVGA GTX 780Ti SC 
GraphicsRAMHard DriveHard Drive
EVGA GTX 780Ti SC Kingston HyperX Beast 32 GB Kit (4x8 GB) 2400MH... Western Digital 2tb Enterprise Samsung 840 Pro SSD 256GB 
Optical DriveCoolingCoolingCooling
Pawtec External USB 3.0 Aluminum 8X DVD-RW Writ... Primochill ghost fitings Monsoon reservoir Swifttech MCP50x/2  
CoolingCoolingCoolingCooling
Primochill rigid acrylic tubing EK supremacy CPU block - Nickel EK 780Ti waterblocks x3 - Nickel Lamptron FC9 fan Controller 
CoolingCoolingCoolingCooling
9x Primochill Acrylic Radiator Grills Alphacool ST30 280 radiator Alphacool ST30 280 radiator Alphacool 420 80mm 
OSMonitorKeyboardPower
Windows 7 Ultimate Dell UW3014 Merc stealth steel series keyboard EVGA NEX1500 PSU 
CaseMouseMouse PadAudio
Lian Li PC-D600 Razer Death Adder Mouse Razer Scarab mousepad Logitech X-540 5.1 speakers with sub 
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