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[Guide] Air Cooling Questions Answered Here! (Updated 8/16/10) - Page 109

post #1081 of 1086
Quote:
Originally Posted by WeAreNotAlone View Post

Sure it's safe, you can connect up to (135 ) SP120L fans to that motherboard !
(Just kidding, POINT IS YOU NEED TO CONTACT THE MANUFACTURER /DOWNLOAD THE OWNERS MANUAL OF THE MOTHERBOARD AND SEE IF IT HAS SPECS on HOW MUCH CURRENT DRAW the HEADER is RATED TO HANDLE. I'D SUGGEST YOU E-MAIL THE MANUFACTURER (Tech Depart, NOT SALES) vs or in addition to calling them so you will have something in WRITING.... On the phone you may be told you can run 135 SP120L fans VERBALLY.

If rep says header will do 2amp, have him put it in writing.)

With that info in hand you compare it against what the fans are rated at trying to keep the load at about 50%.


.
Okay, i called them and asked
I told them, my motherboard model, and told them i have 2 system fans, 1 on the rear (4 pin) and 1 on the front (3 pin)
and i asked them how many current draw it can hold
they told me 1 amps and i asked it for it in writing in email.
they sent me this

"They are rated to support 1amp of fan.

Sincerely,
MSI Service & Support Division"

also, does that mean each system header can hold up to 1 amps? or the total from all system headers (in my case 2) can hold up to 1 amps?
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post #1082 of 1086
Quote:
Originally Posted by WeAreNotAlone View Post

Have you been drinking?rolleyes.gif

It's really as simple as this:
Contact the mfg, or open the owners manual as see what the fan header(s) are rated at.
Compare that to the amperage the fans are rated at.
Most likely on a desktop board it's 1amp.

Try to shoot for loading the header(s) @ 50% , maybe 80% of whatever it is rated for. Alternatively invest in a powered PWM controller.

DONE.

PS: Once you do find the specs/ get something from manufacturer post back in detail like you'd like to run across right now.
EG: xyx board is rated at xyz amps on xyz header. Safety margin is 2 to 1 (You can run it @ 100% or the rated capacity, example 1amp and the circuit (when new) will supply up to 2amps)


.

how do "aim for 50% load on the headers" ?? does that mean the fan spinning at 50% load?
also, i have 2 system header, the rear one is 4pin and front is 3 pin
does that mean my front fan will spin at full power? (and does that mean 100% load??)
and for the rear one (with a 4 pin) i can control the spin via bios right?

Quote:
Originally Posted by WeAreNotAlone View Post



"Performance fan" is typically a fan that "PUSHES MORE AIR" than a "stock" / OEM, Low noise fan does.

The more air a fan moves generally means more noise.
Pushing air thru radiators = Back-pressure, aka "Resistance) vs pushing air thru "free space" (less back-pressure).
The more back-pressure, the more the fan has to work. /more amperage the fan will draw.


.

also, by that definition, then isnt all fans not from cases "performance fans" then?

how come OP suggests not to directly put fans onto mobo but to hook it up to PSU? (doesnt that mean it runs full power all the time?)
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post #1083 of 1086
Quote:
Originally Posted by IMKR View Post

Okay, i called them and asked


I know you linked to the Newegg page for the board, but to help others doing a Google (or whatever search) edit in full name of, model#, revision number, etc of the board When talking about "the motherboard" refer to it by the part number/full name/model so the info in your posts is tied /linked to that "board".

EG: MSI H81M-P33 LGA 1150 Intel H81 SATA 6Gb/s USB 3.0 Micro ATX this of that... MSI H81M-P33 LGA 1150 Intel H81 if you want to shorten it a bit.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130731&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

Doing such ties any info to that board, helps those that are Googling for info. I don't know about you but I like it when I can type in the part number of something and the search results are product specific. thumb.gif

Doing such also reduces confusion, and helps out in situations a poster may rely on his "sig", his "signature to convey such info and the poster swaps out a component... Updating his sig with the new systems specs. On alot of boards "sigs" may not be archived and instantly a entire thread is completely worthless as the suggestions, tips, fixes people have taken time out of their day to suggestion are not tied to any particular item /component, model, etc.

As a example of this:
Say someone had a Corvette, they are having a problem and say 75 people take the time to post suggestions. The problem is resolved. Great thread with alot of tips. Those 75 people gave a good amount of time in the quest to help the poster.
No where (posted) in the thread is it mentioned what year/model the Corvette is... ALL this info is in the posters "Sig".

Poster buys a Mustang, and updates his profile. Instantly the whole thread's worth drops to ZERO.... When this happens in a round about way the poster just kicked those 75 people in the teeth. (wasted their time).

It only takes a second or two to copy and paste the words 78 Corvette, xyx engine, what trim level it is.

Quote:
I told them, my motherboard model,MSI H81M-P33 LGA 1150 Intel H81 and told them i have 2 system fans, 1 on the rear (4 pin) and 1 on the front (3 pin)
and i asked them how many current draw it can hold
they told me 1 amps and i asked it for it in writing in email.
they sent me this

"They are rated to support 1amp of fan.

Sincerely,
MSI Service & Support Division"

also, does that mean each system header can hold up to 1 amps? or the total from all system headers (in my case 2) can hold up to 1 amps?

E-mail them back and have them VERIFY, how much EACH header of the MSI H81M-P33 LGA 1150 Intel H81 will run.

Q: Isn't this info in the OWNERS MANUAL? (If it's not, ask them why not?)

Additionally give them the specs on the fans you are wanting to use (or make up some specs with each fan pulling 1.0 amps).

Ask them how much of a "safety margin" they engineer in (Not that they'd tell you)

Ask them if the 1.0amps is spec'd for the life of the board (Over engineered, Robust) to compensate for aging components.

Stuff like that.


.
Edited by WeAreNotAlone - 3/6/14 at 12:44am
post #1084 of 1086
Quote:
Originally Posted by IMKR View Post

how do "aim for 50% load on the headers" ?? does that mean the fan spinning at 50% load?

If fan header (or total of the headers) is rated @1.0amp, to be only the safe side keep the total draw (amps @ .5 amp).
Two fans @ .18 each is .36 amps.
That's what that means.

Will a 1.0 amp fan header drive (power) a 1.0 amp fan?
Yes. The point in reducing the loading is to compensate for components as they age.
MSI isn't a "fly-by-name: brand I would assume you could run 1.0amp thru each header, AND that they are engineered with a safety factor of 2 to 1... or at least 1.25 to 1.

Quote:
also, i have 2 system header, the rear one is 4pin and front is 3 pin
does that mean my front fan will spin at full power?

Depends on the BIOS.

Have you read thru the MSI H81M-P33 LGA 1150 Intel H81 OWNERS MANUAL?
Have you gone into the bios to check?
Have you read thru the product page on MSI for info on the board?
Does MSI have a "overclocking" /monitoring app? If so run it.
Quote:
(and does that mean 100% load??)

A good engineer figures the product running at FULL THROTTLE (load).. every component loaded fully... So yes that is 100% Load. He then adds in a safety margin to compensate for components as they age.
Quote:
and for the rear one (with a 4 pin) i can control the spin via bios right?

The bios will control both the 4-pin and 3-pin headers, to what degree of control is dependent on how advanced the bios is /how it is setup.
Quote:
also, by that definition, then isnt all fans not from cases "performance fans" then?

Things can be marketed in various ways. "Performance" can take many flavors.
Generally a Performance fan moves more air than a OEM fan, draws more apps.
It's a general term, there is no "law" that states xyz fan has to move so much air.
Quote:
how come OP suggests not to directly put fans onto mobo but to hook it up to PSU?

Reason is the POWER for the fan(s) is NOT going thru the motherboard. Power=heat, too much heat= failure /burnout.
You can use whatever fan or fans you want.



To sum all of this up.... On a desktop board I wouldn't worry about running (2) .18 amp fans separately or on the same header.

Oh, BTW does the board have a warranty?

.
Edited by WeAreNotAlone - 3/5/14 at 5:42pm
post #1085 of 1086
Warning: Spoiler! (Click to show)
Quote:
Originally Posted by WeAreNotAlone View Post

I know you linked to the Newegg page for the board, but to help others doing a Google (or whatever search) edit in full name of, model#, revision number, etc of the board When talking about "the motherboard" refer to it by the part number/full name/model so the info in your posts is tied /linked to that "board".

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130731&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

(In other words add in info YOU would like to run across. wink.gif EG: Mfg, model, revision number, etc....

MSI H81M-P33 LGA 1150 Intel H81 SATA 6Gb/s USB 3.0 Micro ATX this of that... MSI H81M-P33 LGA 1150 Intel H81 if you want to shorten it a bit.
E-mail them back and have them VERIFY, how much EACH header of the MSI H81M-P33 LGA 1150 Intel H81 will run.

Q: Isn't this info in the OWNERS MANUAL? (If it's not, ask them why not?)

Additionally give them the specs on the fans you are wanting to use (or make up some specs with each fan pulling 1.0 amps).

Ask them how much of a "safety margin" they engineer in (Not that they'd tell you)

Ask them if the 1.0amps is spec'd for the life of the board (Over engineered, Robust) to compensate for aging components.

Stuff like that.


.
i emailed them back asking for a vertified, legimatie form and this is what i got
"

Dear customer, For H81m-p33 each 3pins header are 1amp each.
"
doesnt seem very "legimate" or "professional" to me lol, so i called them back
and i probed at it a bit more and they told me if i want it to be a vertified, written form, i have to request it towards their HQ, (which I just did) and they told me i should get an email about 1 week from now.

I also asked them why its not in the owners manual and his exact (more or less) response was
"this information wouldnt be on the manual. You can find this information with a quick google search, desktop mobos fan headers are generically/generally 1 amps per header." (which is also what you guys all told me)

for the last 2 question, the guy didnt know, said i have to talk direclty to HQ.

so im guessing these guys are just ordered to give us the general "each fan header is made to hold 1amps" answer ?

and yes to the warranty (i built this PC ~~ 4 months ago)
Edited by IMKR - 3/5/14 at 6:16pm
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post #1086 of 1086
That's because the ATX (I think) standard calls for at least 1amp CONSTANT and 2amps surge
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