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View Full Version : How many amps can a motherboard take with a fan.


john19055
04-26-09, 08:50 AM
I have a Gigabyte EX58-UD5 and I can't find anywhere where it's list the maxium that a fan header can take ,does any one know if it can handle .5amps or 6watts.Any help would be apreciated.

john19055
04-26-09, 11:19 PM
How about any i7 motherboard ,how much do the fan headers useally take.

john19055
04-27-09, 12:06 AM
I was'nt planning on hooking up a Delta 120 240CFM 40w .I just wanted some ideal what the fan headers can take .I have read everwhere in my manual .I read one site that said it was 4amps per header but that sounds like way too much voltage.48watts.So i guess I will just hook them up with a 4pin molex and just hook up the rotation wire to the headers .

Bman212121
04-27-09, 01:00 AM
What fans are you talking about? Somone else might have them already hooked to a board. FWIW I've never had an issue with any fan I've hooked directly to a board before. Most standard fans are less than .2 amps. I just looked at half a dozen fans I had lying around. My quieter fans use .1 for 80MM and .15 for 120MM. The most power hungry fan I have is the little chipset fan that goes onto a 780i, it takes .19A.

EDIT: I have an older version of this fan. It is rated for .5A at full speed. (4800rpm) That's leafblower speed and I have run that 24/7 at full speed before without issue.

http://www.thermaltakeusa.com/Product.aspx?C=1165&ID=1735#Tab1

ViN86
04-27-09, 03:15 AM
I was'nt planning on hooking up a Delta 120 240CFM 40w .I just wanted some ideal what the fan headers can take .I have read everwhere in my manual .I read one site that said it was 4amps per header but that sounds like way too much voltage.48watts.So i guess I will just hook them up with a 4pin molex and just hook up the rotation wire to the headers .

Any reason you want to connect it to the motherboard and not the PSU directly or a fan controller?

Dazz
04-27-09, 11:14 AM
Pretty much all fans that have a 3 pin header will work without issues, Deltas and tornados are too power hungry however. i would say 140mm upto 2000rpms and 120mm upto 3000rpms.

john19055
05-02-09, 10:46 PM
no problems hooking them up with a four pin molex ,I was just curiousto know how many amps they can take.I was looking at a fourm where a guy had contacted gigabyte and they said the fan header could take 4amps which seem to high to me and I thought some here might know since my book says nothing about how many amps or watts they can handle.