Case Fan doesn't always start up

[ironheader]

Hi There;

 

I have a new case fan installed its a "Raijintek Aeolus B Slim Fan"; The manufacturer states that it has a startup voltage of 7V; I have the fan running at 8.7V.

 

My issue is that the fan doesn't always start up; sometimes I need to bump the side panel to get the fan to start up. 

 

Anyone have any ideas? Defective Fan? Run Fan at 12V and use a Resistor Instead? 

 

Thanks;

Deven

[Praesi]

bump the sidepanel?

[kwljunky]

 

 

Case fan controller or motherboard or direct into the powers? 

[ironheader]

Case fan controller or motherboard or direct into the powers?

It is connected directly to the psu, undervolted to 8.7 (12v Positive, 3.3v Negative)

bump the sidepanel?

Fan is installed on the acrylic side window, if I bump it, it gets the fan to spin and start.

[Drixen]

Seems lke you have some static interference happening.

[Naeaes]

It's not uncommon for PWM fans to act up when they're undervolted without PWM... 

[somik]

Why not get a cheap PWM controller instead? You can get "Buck converters" for as low as $1.00 from eBay. With this you can regulate the 12V supply to output any voltage you want. Heck, get the one with display for $2.50!

http://www.ebay.com/sch/i.html?_sop=15&_nkw=buck+converter&rt=nc&LH_BIN=1

[shedicus90]

may be an under volt or too low a pwm signal, it's actually rather dangerous if left as it means the motor cannot keep cool, while unlikely to happen it could cause damage or even a fire but that is an extreme circumstance. maybe go into bios and turn up the rpm's just a tad and see if that cures it.