Disconnecting fans with the PC on

7h3r4py · Aug 19, 2003

How bad is this? Is it a big no no or does it not really matter? I am tired of turning my PC off to check varying sound levels :\

Tebore · Aug 19, 2003

Well I've done this before and it didn't cause me any problems. It kinda like flicking a switch on and off. I say you should be ok but just watch out for wires shorting out. When the system starts you can just hit pause/break to stop the system from booting and disconnecting the harddrives if you want to turn the system on and off to check sounds.

CamH · Aug 19, 2003

I do it all the time. No big deal.

creepy · Aug 19, 2003

its no big deal i do it all the time...well so far for me its been no big deal

Supertrucker · Aug 19, 2003

i do it, dont have any problems, but i dont use a ground strap either... id say its mostly safe

JDXNC · Aug 19, 2003

Just don't do it to your CPU fan for any lenght of time!

johnoh · Aug 19, 2003

I disconnected my cpu fan once and logged the temp increase. It went up 10C in 5 minutes. Slower than I would have guessed. (stock 1800+ w/ sk7)

Yuriman · Aug 19, 2003

Wow, thats slow. My 2nd rig went up 20c in 1min. My watercooler went up 10c in 2min. Must have good case airflow.

Tebore · Aug 19, 2003

You're using a stock HSF compared to a SK7 which has more Mass and density which means more time or energy must be put in to warming the SK7.

MrBean · Aug 20, 2003

I do it all the time with no problem. One word of warning though, even though you cannot put the connectors in all the way backwards. You can get it close enough to arc, ive heard of someone frying a dvd-rom this way.

PatrickBateman · Aug 20, 2003

I wouldn't do it myself.
-I think there would be a surge draw at connection.
-could connect the plug incorrectly or short it on something else
-could short something else on the board, even with my hand.

I use the dubious method of stopping the fan with my finger; pressuring the cylinder/motor region.

but that's just me.

ZaP37 · Aug 20, 2003

PatrickBateman said:
-I think there would be a surge draw at connection.

Probably not more than your CD-ROM spinning up a CD after you insert it, though...

Janissary · Aug 20, 2003

No problem for me, I do it very often, but you should be sure about the power it will draw if you are connecting fans directly to your Mobo, you should be aware that some fans may fry your mobo because of this.

xHUNTERx · Aug 20, 2003

just make sure your pin doesnt touch any parts of the mobo or the case, i've accidently had the pin touch the case and it caused a shortage to poweroff my computer.

Zim2411 · Aug 20, 2003

i do it with my 120mm fan... i hook directly in to the mobo, no problems at all. I can't even see the connector and i've never messed it up...

unreal · Aug 20, 2003

yeah never had a problem with a case fan..

cmonkey · Aug 21, 2003

Unplugging and plugging back in a case fan once shut off my pc, but I'm pretty sure that's because I have an EXTREMELY crappy PSU. My voltages are currently at 1.63v, 2.93v, 4.92v, 12.18v. It's a miracle that it's actually on.

amdperson · Aug 21, 2003

I do it too. just be careful not to connect the cable the wrong way. you dont want to short anything, can be costly to replace pc parts.

link1305 · Aug 21, 2003

A fan should be fine, but don't try it with a harddrive. I tried to plug on in once, and it shutdown my whole computer

Giblet Plus! · Aug 21, 2003

I shorted one of my 120s while my pc was on. It turned off, but started up just fine afterwards.

Just don't put the floppy power connector in backwards.

Disconnecting fans with the PC on

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