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post #1071 of 1086
Quote:
Originally Posted by DaveLT View Post

Yes it is ... It's really only 0.18amps per fan.

than how do I know which fans shouldnt be hooked directly to the mobo as the guide (OP) suggests?

How do we know what a "performance fan" is? (as defined by this guide)
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post #1072 of 1086
Quote:
Originally Posted by IMKR View Post

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=
this is the mobo i have.
So is it safe to put my SP120L fans directly to the mobo system header?


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%.

***********************
Quote:
also, since my rear system header on the mobo has a 4 pin, that means i can control the RPM right? while the 3 pin one will always run at full speed?

Depends... 3-pin may be variable /programable as well. Go into the BIOS and or Download whatever apps mfg might have to control fan speeds.
3 pin, vs 4-pin

4-pin should use what is called PWM.

The speed of 3-pin fans are controlled via VARYING the supply voltage to the fan. More voltage spins the fan faster.

4-pin fans receive FULL SUPPLY VOLTAGE. "Speed" of 4-pin fans is controlled by a controller chip embedded within the fan which turn the fan on and off rapidly. (In pulses)
(To illustrate plug in a vacuum cleaner, blow dryer etc and rapidly turn the switch on and off... Notice how you can speed it up or slow it down)

The 3 pin way is the old way, the 4-pin control scheme is the new way.

3-pin fans are generally cheaper. *
4-pin fans - have that embedded controller chip in them, which adds to the cost to manufacture.

A 3-pin fan will plug into a 4-pin fan header, result is it will run at full speed.

A "powered" PWM comtroler which gets it power directly from the powersupply, can control /regulate 4 and 3 pin fans AFAIK.

*Note, Depending on where 3 and 4 pin fans are in the "Product Cycle".... (Inverted Bell Curve) 4-pins might be cheaper. Buy it early in lifecycle price is high, when it gets popular price drops, as it is phased out price may increase (somewhat)... as the item (whatever it is) is "rare"... and they know they've "got you" if you need to "match" something up.

Trick to buying is not to be the first guy to the party, nor the last.

.
post #1073 of 1086
Quote:
Originally Posted by kyosak View Post

Is this safe to use for removing thermal paste from my CPU?

http://www.amazon.com/Philips-SVC1116G-Screen-Plasma-Screens/dp/B004PYD9I2/ref=sr_1_1?ie=UTF8&qid=1394006433&sr=8-1&keywords=lcd+cleaning+phillips

I have one at home

Also, which paste is better, the stuff that comes bundled with Noctua CPU fans, or Arctic Silver 5?


I'd use 91% rubbing alcohol. Screen cleaner for a LCD, PLASMA, etc is likely to have additives in in.

91% Rubbing Alcohol is available everywhere.
post #1074 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%.

***********************
Depends... 3-pin may be variable /programable as well. Go into the BIOS and or Download whatever apps mfg might have to control fan speeds.
3 pin, vs 4-pin

4-pin should use what is called PWM.

The speed of 3-pin fans are controlled via VARYING the supply voltage to the fan. More voltage spins the fan faster.

4-pin fans receive FULL SUPPLY VOLTAGE. "Speed" of 4-pin fans is controlled by a controller chip embedded within the fan which turn the fan on and off rapidly. (In pulses)
(To illustrate plug in a vacuum cleaner, blow dryer etc and rapidly turn the switch on and off... Notice how you can speed it up or slow it down)

The 3 pin way is the old way, the 4-pin control scheme is the new way.

3-pin fans are generally cheaper. *
4-pin fans - have that embedded controller chip in them, which adds to the cost to manufacture.

A 3-pin fan will plug into a 4-pin fan header, result is it will run at full speed.

A "powered" PWM comtroler which gets it power directly from the powersupply, can control /regulate 4 and 3 pin fans AFAIK.

*Note, Depending on where 3 and 4 pin fans are in the "Product Cycle".... (Inverted Bell Curve) 4-pins might be cheaper. Buy it early in lifecycle price is high, when it gets popular price drops, as it is phased out price may increase (somewhat)... as the item (whatever it is) is "rare"... and they know they've "got you" if you need to "match" something up.

Trick to buying is not to be the first guy to the party, nor the last.

.
Just a small correction. PWM fans are done by input of the motherboard to the switching transistor. No logic involved. Logic involvement only occurs to the control of the fan.
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post #1075 of 1086
Quote:
Originally Posted by IMKR View Post

than how do I know which fans shouldnt be hooked directly to the mobo as the guide (OP) suggests?

How do we know what a "performance fan" is? (as defined by this guide)

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)

************************

"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.


.
post #1076 of 1086
Quote:
Originally Posted by DaveLT View Post

Just a small correction. PWM fans are done by input of the motherboard to the switching transistor. No logic involved. Logic involvement only occurs to the control of the fan.


Yep,

Since you seem to be up on things, check out this post (and follow the link)

http://www.overclock.net/t/565007/guide-air-cooling-questions-answered-here-updated-8-16-10/1000_100#post_21895623

Created a thread several days ago and no one has posted ANY useful info.

Seems like "LAPTOPS"... unless it's a high end model don't get much "love" around here.

That said everything is PWM this or that and controlling fans off a 3-pin fan header is rare these days


http://www.overclock.net/t/1471092/adding-a-2nd-fan-laptop-only-1-fan-header-the-only-option-to-add-the-second-fan-is-to-use-a-5v-3-wire-oem-fan


.

.
Edited by WeAreNotAlone - 3/5/14 at 11:44am
post #1077 of 1086
Quote:
Originally Posted by IMKR View Post

Quick quesiton
this guide stats
"Performance Fans:
Performance fans are generally used to cool radiators and CPU coolers. Keep in mind that connecting these performance fans to your motherboard is generally a bad idea as they may pull too much power and fry your motherboard's fan header. (Check your motherboard user manual for exact specification ranges)"

I just bought two SP120L fans to use as case fans and replace the fans that came with my corsair carbide 200r.

Is it a bad idea to hook these two sp120l fans onto my mobo system header?
on my mobo, the rear system header has 4 pin while the front has a 3pin.
Motherboard fan headers are rated for about 1amp. Few fans draw that much power.
With few exceptions the only 4 pin PWM headers are the CPU fan headers. All other fan headers are not. Other 4 pin headers are not using the 4th pin.
post #1078 of 1086
Quote:
Originally Posted by doyll View Post

Motherboard fan headers are rated for about 1amp. Few fans draw that much power.
With few exceptions the only 4 pin PWM headers are the CPU fan headers. All other fan headers are not. Other 4 pin headers are not using the 4th pin.
In the case of GB UD-series mobos they can handle 2amp surge current (usually fans are labelled as surge current) and slightly more than 1amp constant.
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Delta AFB1212SH x2 Dell U2713HM CM Storm MECH FSP Aurum PT 1200 
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post #1079 of 1086
Quote:
Originally Posted by WeAreNotAlone View Post

Have you been drinking?rolleyes.gif
.

Nope tongue.gif
sry though, i relaize how much of a stupid question this is and that it sounds like im trolling. (which im not)
One of my many reasons why i like this site is because everyone takes it seriously and help me out and dont beret me for calling me a troll or anything.
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)

************************

"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.


.
i will call MSI (my motherboards an MSI) today and find out than ill get back to this thread biggrin.gif
thx for the help so far guys
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post #1080 of 1086
Quote:
Originally Posted by IMKR View Post

Nope tongue.gif
sry though, i relaize how much of a stupid question this is and that it sounds like im trolling. (which im not)
One of my many reasons why i like this site is because everyone takes it seriously and help me out and dont beret me for calling me a troll or anything.
i will call MSI (my motherboards an MSI) today and find out than ill get back to this thread biggrin.gif
thx for the help so far guys

I understand your concern. I'm trying to add a second fan to a LAPTOP and am extremely concerned about the additional load of (1) dinky 5vdc .35amp overloading (burning out) the (1) fan header on the board.

I know they don't give desktop boards away, but if you burn out a fan header on a laptop replacing the motherboard is a bigger $$$$ /time issue.


The point I was trying to make was someone could say: Hey you can connect (135) SP120L fans to that board !, you'll be "fine "dude... you do so and it burns out the on-board fan header.

PS: Want to trade projects? I don't have the option to use a powered PWM controller /splitter. It seems NO-ONE here has any experience , nor ideas on how to try to control a 3-wire fan, (On a laptop, Desktop there are some options that fit in 5.25 drive bay. I don't need anything fancy, just some way to vary the speed on the LAPTOP automatically.

There is no info on the net, info is restricted... Can't find a SERVICE, MAINTENANCE MANUAL as I think TOSHIBA calls it to get any hard info.

.http://www.overclock.net/t/1471092/adding-a-2nd-fan-laptop-only-1-fan-header-the-only-option-to-add-the-second-fan-is-to-use-a-5v-3-wire-oem-fan/0_100

.
Edited by WeAreNotAlone - 3/6/14 at 12:50pm
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