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Fan question

Last response: in Systems
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March 6, 2011 4:31:09 AM

I was wondering what every ones opinion was on connecting the fan directly to power supply or using the mobo headers. I understand I have more control over speed and such but is it harder on the board ?
Tia

More about : fan question

a b B Homebuilt system
a c 289 ) Power supply
March 6, 2011 4:35:38 AM

Its no harder on the board as long as you are using a normal power fan, there are some crazy ones that draw close to an amp or more and spin at over 5000 RPM those will hurt the board, but a normal one wont put any undue stress on the board, the fan header's whole job is to power fans, it doesnt hurt it to do so.
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a b B Homebuilt system
a c 148 ) Power supply
March 6, 2011 4:35:47 PM

Depends .... in cases liek the Antec 1200 / DF-85 where the case manufacturer provides speed control (variable speed knob or 3 speed switch), I'd connect to PSU.

Where 3 pin fan ends are provided and no speed control, I'd connect to MoBo. Enthusiast boards from Asus for example are rated for 2 amps .... most boards however are limited to 1 amp. I'd recommend not exceeding 50% of that to allow some room for inrush current.
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