Case fan needed (120 MM)

Bigshow1030 · 02-07-2005, 07:11 PM

If it has a slot for another available fan use it

SlothX311 · 02-07-2005, 10:46 PM

Quote:

Originally Posted by Praetor

Well if you've got 10 fan jacks on the mobo than yes. If the fan is too much for the mobo jack then .... the fan simply wont power or it will run underpowered..

thank you at least someone knows what he's talking about......they wouldnt make it if there was a chance that the fan could harm the motherboard

joelkyr · 02-08-2005, 12:44 AM

Quote:

Originally Posted by Praetor

Well if you've got 10 fan jacks on the mobo than yes. If the fan is too much for the mobo jack then .... the fan simply wont power or it will run underpowered..

My answer to this is -=BS=-
More fans = more current. Think - what is the purpose of fuses?
They get fried not to let your electicial installation fry. If you run 20A through tiny cable, you will burn it.
If you examine fan rails on PCB of your mobo - you'll notice that they have very small profile surface and that means that they can't stand much current. There are also some regulators and they have limited capabilities too.

its just common sense and basic knowledge of electricity and electronics. Wanna prove?
P = U * I
R = U / I
so
P = U*U / R

around 5 ohms and less should do the job

try putting a small resistor between +12 and GND on your mobo, or even short it. possible things that may happen:
a) mobo fried
b) fan rails fried
c) PSU shutdown (the most possible)

**Praetor** · 02-08-2005, 07:41 PM

Quote:

My answer to this is -=BS=-
More fans = more current. Think - what is the purpose of fuses?
They get fried not to let your electicial installation fry. If you run 20A through tiny cable, you will burn it.
If you examine fan rails on PCB of your mobo - you'll notice that they have very small profile surface and that means that they can't stand much current. There are also some regulators and they have limited capabilities too.

1. No need to get childish and hostile. That'll get you promoted real fast
2. How many fans pull 20amps? Most are in the ballpark of 0.5amps.
3. If you connect a superpowerful fan to a dinky motherboard connector, guess what, it doesnt power the fan (and if it does, the fan is gonna be spining at a whopping 0.5rpm)
4. Yes more fans = more current = more power blah blah ... and how many mobos feature anywhere near 10 fan headers? Fan headers are designed by engineers for a reason -- to connect fans -- and if they didnt think it's safe to connect fans to them then they wouldnt be found on the mobo.

joelkyr · 02-08-2005, 10:18 PM

Quote:

Originally Posted by Praetor

Fan headers are designed by engineers for a reason -- to connect fans -- and if they didnt think it's safe to connect fans to them then they wouldnt be found on the mobo.

.....of course they are, but mobo manufacturers give info about max load on these headers - often 2 values - max for one connector and max added. That's also for some reason. One thing I have to agree is that power sources decrease voltage, when they're overloaded. But that's not normal behaviour - they are -=overloaded=-. It's a pretty short way from overloading to burning.

SlothX311 · 02-09-2005, 05:24 AM

dude just give up, how many times has praetor been wrong?

<------ 311 posts!

aaron · 02-08-2005, 07:59 PM

Ived been reading this thread, im a newbie here and trying to get some info on building PC, so its ok to put multiple connections(120mm fan) on your mobo without harming it. Seems joelkyr is very persistent on what he knows and would stand firm on what he believes to the point of argueing with a moderator,is that allowed in here.

**Praetor** · 02-08-2005, 08:04 PM

Quote:

Seems joelkyr is very persistent on what he knows and would stand firm on what he believes to the point of argueing with a moderator,is that allowed in here.

He's certainly welcome to argue his position as long as it stays clean and civilized

As for his position, Im sure he has a specific example (or should i say counterexample) in mind but Im pretty sure that such cases are anomalous simply due to statistical variance fo 90% of 120mm fans on the market

aaron · 02-08-2005, 08:12 PM

does he have a point or what, coz in my belief, you can connect fans on your MOBO, but ived never tried 120mm though.

joelkyr · 02-09-2005, 05:51 AM

have you been reading the post dude? where were you when we were debating on this matter?

it doesnt mean if you are a moderator you can never be wrong and you can never argue with him, right? and i dont think you ever did, am i right? why?

even with a 311 post that you have doesnt impress me, not at all. if you can read my last post i think you certainlly understand my point, im just stating my point which i believed and base on what i know.

02-07-2005, 07:11 PM	#1 (permalink)
Bigshow1030 Platinum Member Join Date: Dec 2004 Location: Terre Haute, Indiana Posts: 576	fans If it has a slot for another available fan use it __________________ AMD Athlon 64 3200 DFI "LANPARTY UT nF3 250Gb" Kingmax SuperRAM 1GB(512MBx2) DDR PC-3200, Maxtor(1 200GB+160GB) XFX GeForce FX 5900 Video Card, 128MB DDR RAIDMAX Silver Aluminum Gaming Case w/420W P.S."668WSP" NEC 3520 Dvd-Burner Sony CDRW-DvdRom Jason :P

02-09-2005, 05:51 AM	#10 (permalink)
joelkyr Gold Member Join Date: Jul 2004 Age: 34 Posts: 344	have you been reading the post dude? where were you when we were debating on this matter? it doesnt mean if you are a moderator you can never be wrong and you can never argue with him, right? and i dont think you ever did, am i right? why? even with a 311 post that you have doesnt impress me, not at all. if you can read my last post i think you certainlly understand my point, im just stating my point which i believed and base on what i know. __________________ MOBO: ASUS P4C800E DELUXE CPU: P4 3.4HT @ 3.918ghz COOLING: Vapochill PE / MCW20-P /MCW50 /MCP650/ BIX RAM: TWINX1024-4400C25 CORSAIR HDD: MAXTOR 120GB/8MB OS: XP PRO SC: TURTLE BEACH SANTA CRUZ 5.1 PSU: OCZ Modstream 520W Last edited by joelkyr; 02-09-2005 at 05:59 AM.

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02-09-2005, 05:24 AM	#6 (permalink)
SlothX311 Platinum Member Join Date: Nov 2004 Location: North Canton, Ohio Age: 23 Posts: 707	dude just give up, how many times has praetor been wrong? <------ 311 posts!

02-08-2005, 07:59 PM	#7 (permalink)
aaron New Member Join Date: Feb 2005 Posts: 19	Ived been reading this thread, im a newbie here and trying to get some info on building PC, so its ok to put multiple connections(120mm fan) on your mobo without harming it. Seems joelkyr is very persistent on what he knows and would stand firm on what he believes to the point of argueing with a moderator,is that allowed in here.

02-08-2005, 08:12 PM	#9 (permalink)
aaron New Member Join Date: Feb 2005 Posts: 19	does he have a point or what, coz in my belief, you can connect fans on your MOBO, but ived never tried 120mm though.