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can you take the psu out of the psu

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#1
i was wondering why cant you take the psu circuit board out of the psu case and mount it at the bottom of the case and put a 120mm fan blowing over it.

shouldnt it run cooler and much quieter that way?

a pair of 80mm fans would fill the psu hole left by the missing psu.

i seems the airflow for psu is so inefficient that opening the box to allow air to move across it would help.
 

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#2
You can, just don't touch anything in there. It hurts really really bad. You just have to trust me on that one.
 
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#3
Dont do it. The thick case of the PSU does 2 things:

1./ Creates an earthed cage around the PSU components. This stops A LOT of e-noise.

2./ Keeps fingers (and dust and other objects) away from hi-voltage components.

WHY DO IT? It won't run cooler or quieter if you add extra fans. It will only blow the heat OVER THE CPU. You need the PSU fan to suck air out, not mix it in the case.

COMPLETELY BOGUS IDEA. Go buy yourself a decent PSU if your current one is no good.

P.S. If your car aircon is not good enough, you don't get a can opener to take the roof off and then add extra fans.
 
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#4
the whole idea was because the 120mm fans blows its ass off and the air hits a wall so to speak in the circuit board the just kinda drifts out the back without much cfms force at all.

so you have a fan that cant force the air into the psu so its just spinning but IMO hardly pushing any air through the psu.

even the single rear fan types have very few air openings IMO so the airflow is restricted for them as well.

if air moved through the psu at the same rate of cfms as if the fan were a case fan wouldnt it be better?
 
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#5
bump
 

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#6
They make PSU's with dual fans, and you can always add a fan or put in better fans. You gotta know what your doing though, make sure it's fully discharged, and be carefull not to touch anything other than fans, fan wires etc.

Still don't recommend it, just buy a Quality PSU with a higher rating than you need and it will run cooler, because it won't have to work as hard to power your computer.

:toast:
 

panchoman

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#7
Dont do it. The thick case of the PSU does 2 things:

1./ Creates an earthed cage around the PSU components. This stops A LOT of e-noise.

2./ Keeps fingers (and dust and other objects) away from hi-voltage components.

WHY DO IT? It won't run cooler or quieter if you add extra fans. It will only blow the heat OVER THE CPU. You need the PSU fan to suck air out, not mix it in the case.

COMPLETELY BOGUS IDEA. Go buy yourself a decent PSU if your current one is no good.

P.S. If your car aircon is not good enough, you don't get a can opener to take the roof off and then add extra fans.
ditto, while you probably can, very very bad idea. the cover actually keeps the heat inside the psu and take it out of the case, exposing the psu heat to the system, that too with a fan to take out all the heat and through it at your system is not a good idea. a single 80mm fan will cool the psu the best.
 
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#8
well what if i replaced the back panel facing the drive bays with an open grill like you see on the rear of most 120mm fan psu? in a psu with a rear exhaust fan it could then draw air straight through it with no restrictions. i dont really care how its done i just wanted to figure a way to increase the psu airflow.

i even thought of cutting a hole to mount a case fan to push air through it but the 120mm fan blocks it.

the thing is that most quiet psu run hot, not too hot but they do run hot all the time so i want to move more air through it without increasing the noise.
 
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#9
You can, just don't touch anything in there. It hurts really really bad. You just have to trust me on that one.
Oh god that feels weird. I've done it once....thank god I only had one hand near it.
 

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#10
how do you guys get electrocuted by a 500W+ psu and live to tell the tale? anyway, if you want more psu airflow, just cut some more fan holes and add fans. you want the psu heat to not enter the system, psu's run at around 40C on average. and you dont want to dump that heat onto your cpu/vid card. the job of the cover is to protect you and also to contain the heat untill it is removed from the system.
 
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#11
how do you guys get electrocuted by a 500W+ psu and live to tell the tale? anyway, if you want more psu airflow, just cut some more fan holes and add fans. you want the psu heat to not enter the system, psu's run at around 40C on average. and you dont want to dump that heat onto your cpu/vid card. the job of the cover is to protect you and also to contain the heat untill it is removed from the system.
It's not that hard to survive an electrocution. And at any rate, mine was from like a 100 W psu. The psu was open (checking the fuse) so I put the new fuse in, plugged it in and powered up....it worked, then I unplugged from the wall and the mobo, picked it up with one hand, and then dropped it as it shocked me. The flow of electricity never crossed my heart or brain...the important parts.

As far as this psu out of the casing....really don't do it man, casing is important, because capacitors can hold their charge for a while and you don't want to have to wait a few hours to make sure it drains and such. Just mount the PSU where it's supposed to be.
 
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#12
im an old ac repairman.

at least once a month i got zapped, mostly from 220v which strange as it sounds is safer than 110v. the 220v hits you like a punch and knocks you off it. 110v grabs you and holds on, thats the one that kills people.

capacitors are like being tasered or cattle prod.

as far as cutting hole, the 120mm fan is like 3/8" from touching heat sinks and anything below it is blocked by capacitors n stuff. if i remove it the air will go over the psu but not onto it so no cooling.

there are very few straight through fan designs anymore and the few i see are noisy as hell.
 
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#13
A good PSU wouldn't get hot enough to bother anyways...
 
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#14
You just need a large PSU shell ;)

Unfortunately the cases that fit them are pretty rare...

 
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#15
im an old ac repairman.

at least once a month i got zapped, mostly from 220v which strange as it sounds is safer than 110v. the 220v hits you like a punch and knocks you off it. 110v grabs you and holds on, thats the one that kills people..
That's not rue everywhere, In Europe I watched a stereo timer grab a guys thumb and I had to kick him off of it. It burned a hole about 1/4 inch wide down to his thumb bone. It depends on the amperage and the phase of the electicity.

capacitors are like being tasered or cattle prod..
Cattle prods have rather large capacitors in them.

It's not the PSU itself that does the damage but the capacitors in them that will hold a strong charge in them kind of like a CRT does. In electronics class in colege we shorted a large old cap with a wire from a distance and blew a hole in the ground about 3 feet wide and 3 feet deep. It was our Proffessors last year, he retired after that class.

:toast:
 

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#16
What you can do to improve airflow is just to put a 80/92mm-fan on the front of it, so it blows backwards. I did that to an old psu I had, and it actually improved things.
 

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#17
Its the amps that do the damage, not the voltage.

You can get hit by 200,000 volts and not die if the amperage was low enough.
Too many amps causes your heart either to stop or to fall out of sync, which is why you see them using shock paddles (defribulators) in medical movies/tv shows like house. Defribulator paddles can not start a stopped heart, but they can shock a heart that is running out of sync back into sync.
 

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#18
Its the amps that do the damage, not the voltage.

You can get hit by 200,000 volts and not die if the amperage was low enough.
Too many amps causes your heart either to stop or to fall out of sync, which is why you see them using shock paddles (defribulators) in medical movies/tv shows like house. Defribulator paddles can not start a stopped heart, but they can shock a heart that is running out of sync back into sync.
And to add to the fun facts, it can take as little as .1A going across your chest to kill you. Note that the number is one-tenth, not one.
 
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#20
yep... 1A = DEATH. You would be incinerated and die. Removing the PSU from the casing is SUICIDE. its extremely dangerous, dont try it. You guys are very naive to think that it will hurt. You will DIE okay? End of story, even if its not plugged in, the discharge from the PSU's capacitors is enough to severely damage your body.

DONT DO IT. A TPU user dying is seriously tragic.

EDIT: You can remove it if you do a full discharge though.... but i wouldnt bother, you have to leave PSU out for 48 hours+. UNPLUGGED.
 
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#21

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#22
yep... 1A = DEATH. You would be incinerated and die. Removing the PSU from the casing is SUICIDE. its extremely dangerous, dont try it. You guys are very naive to think that it will hurt. You will DIE okay? End of story, even if its not plugged in, the discharge from the PSU's capacitors is enough to severely damage your body.

DONT DO IT. A TPU user dying is seriously tragic.

EDIT: You can remove it if you do a full discharge though.... but i wouldnt bother, you have to leave PSU out for 48 hours+. UNPLUGGED.
Dude I was messing around with a PSU that had sit for about a year unplugged when I got shocked the last time. I was stealing it's fans when my screw driver slipped.:shadedshu
 

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#23

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#24
yep... 1A = DEATH. You would be incinerated and die. Removing the PSU from the casing is SUICIDE. its extremely dangerous, dont try it. You guys are very naive to think that it will hurt. You will DIE okay? End of story, even if its not plugged in, the discharge from the PSU's capacitors is enough to severely damage your body.

DONT DO IT. A TPU user dying is seriously tragic.

EDIT: You can remove it if you do a full discharge though.... but i wouldnt bother, you have to leave PSU out for 48 hours+. UNPLUGGED.
I had my PSU open for a couple of months with a 140mm fan on top of it. It was on top of my computer and I got shocked a couple of times (accidentely touched where the power comes in a few times), but I didn't die. I think you exaggerate things. It's still dangerous though..

EDIT: Of course you can die, but not from just pointing at the PSU with a wooden stick.
 
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#25
What you can do to improve airflow is just to put a 80/92mm-fan on the front of it, so it blows backwards. I did that to an old psu I had, and it actually improved things.
are you talking about a push in pull out fan system or do you mean you put a push in push in fan system?