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Old March 3, 2011, 11:05 PM
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Smile system fans

Hi all

When building a new computer, does it matter whether one plugs the system fans into the the motherboard or directly into the power supply. I expect a bit of razzing for that question!
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Old March 3, 2011, 11:18 PM
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preferably into a fan controller, or the mobo which usually can control them too,
if they dont draw insane amounts of juice.

dont worry to ask, were here to help :)
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Old March 4, 2011, 12:22 PM
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If you run it into the PSU it'll run at max speed I believe. Depending on your fan, it could sound like a jet plane!
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Old March 4, 2011, 01:01 PM
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Quote:
Originally Posted by chriso View Post
I expect a bit of razzing for that question!
The stupidest question is the one you won't ask. Simply because you'll never know the answer.
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Old March 4, 2011, 01:38 PM
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Plug em into whichever one is going to help you with Cable management and convenience, some times one or two directly into PSU is most convenient, toher times utilizing several Mobo Headers in more convenient.....as was mentioned directly into PSU means no Fan Control..(not a biggie in many cases)..
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Old March 4, 2011, 03:09 PM
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1) If you plug them into your motherboard, it will draw power from your motherboard and [on higher end boards] will control the fan speed for you. Power draw may be an issue on cheap mobos.
2) Plugging directly into the PSU provides a great power source, but fans run at 100% all the time.
3) Using a fan controller is like plugging it into your PSU (power wise) but lets the controller adjust the speed of the fans to provide best balance between performance/efficiency/noise.
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Old March 5, 2011, 06:26 AM
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Everyone, thanks! Totally appreciate it!

This is y first HTPC build and it is working great, only thing is that is sounds like a jet airplane! The reason I plugged the sys fanss into the power supply directly is that the case has 3 sys fans and the mobo seems to have only one header for a system fan. Is there a way to plug them all into that header?

Regards

Chris
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Old March 5, 2011, 06:33 AM
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What case are you using? (I'm assuming you're using the stock fans)

Folks with more tender ears than mine (26 years working with aircraft) will chime in with fan recommendations, but I'm personally still a fan (pun intended.... ;) ) of the 1350 RPM YLs as a bang-for-your-buck quiet fan.
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Old March 5, 2011, 07:27 AM
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I wouldn't daisy chain any fans onto a single header (I know it can be done) but still thats probably asking too much out of what it is (espically if the board is not higher end).
If your HTPC has room or a 5" bay I would invest in a fan controller as one option to help keep noise in check. Otherwise a good Case fan to use would be the Gelid TC Fan.

NCIX.com - Buy GELID Solutions GELID Silent 12TC 750-1500RPM 120MM Thermal Control Fan 58CFM 12-25.5DBA HDB 3PIN - Gelid Solutions Ltd. - FN-TX12-15 - in Canada

Used these on multiple silent builds and they have worked out fine thus far.

Regards,
ST
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Old March 5, 2011, 08:36 AM
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The case is a Silverstone Grandia GD05 with 3 stock fans, and the motherboard is a MSI 890GXM-G65. The case does not have an extra 5 in bay. The specs I used came from a Maximum PC article, so I trust there is a way to do it.

I appreciate your interest.

Regards
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