PSU Query?

  • Thread starter Thread starter Christo
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Christo

I have a new hiper 24 pin psu and if you refer to my earlier post you will
see that i am having problems,

I have a question, would it at all be possible to plug an old 20-pin ATX PSU
into a motherboard that has a 24-pin ATX connector? just for testing
purposes? not for full time use, or is this too dangerous to the rest of the
system?

Any advice greatly appareciated, thanks in advance

Christo
 
Christo said:
I have a new hiper 24 pin psu and if you refer to my earlier post you will
see that i am having problems,

I have a question, would it at all be possible to plug an old 20-pin ATX PSU
into a motherboard that has a 24-pin ATX connector? just for testing
purposes? not for full time use, or is this too dangerous to the rest of the
system?

Any advice greatly appareciated, thanks in advance

Christo
Click to expand...


No not really. The 20 pin connector is a proper subset of the 24 pin, but
if the motherboard has a 24 pin connector on board, then it's because it
needs power in the extra 4 pins.
 
johannes said:
No not really. The 20 pin connector is a proper subset of the 24 pin, but
if the motherboard has a 24 pin connector on board, then it's because it
needs power in the extra 4 pins.
Click to expand...

ah so that small glimmer of light was crushed there, anyhow i tried shorting
that didn't work i tried everything everyone suggested and nothing has
worked so i RMA's it an ordered a 480w Antec PSU, hopefully that one will
work, if not then it has got to be a motherboard problem as i have tried

a different chassis/switch
shorting the power pins
a different power cable
different plug sockets around the house

still all get the same response, no standby light on motherboard and nothing
happening when i attempt to power up, i suppose if its the motherboard i
will just have to order a new one of them tomorrow and i will have RMA'd a
perfectly fine PSU, even so, these things happen, I am only amatuer building
for myself and dont really have a lot of electronics kit or experience, PSU
has always been a tender subject for me

thanks for helping me out
 
johannes said:
No not really. The 20 pin connector is a proper subset of the 24 pin, but
if the motherboard has a 24 pin connector on board, then it's because it
needs power in the extra 4 pins.
Click to expand...

But you can buy a 20 to 24 pin cable converter for about $10 (US). I used
one for awhile until I upgraded from the PSU that came with my case.
 
Christo said:
ah so that small glimmer of light was crushed there, anyhow i tried shorting
that didn't work i tried everything everyone suggested and nothing has
worked so i RMA's it an ordered a 480w Antec PSU, hopefully that one will
work, if not then it has got to be a motherboard problem as i have tried

a different chassis/switch
shorting the power pins
a different power cable
different plug sockets around the house

still all get the same response, no standby light on motherboard and nothing
happening when i attempt to power up, i suppose if its the motherboard i
will just have to order a new one of them tomorrow and i will have RMA'd a
perfectly fine PSU, even so, these things happen, I am only amatuer building
for myself and dont really have a lot of electronics kit or experience, PSU
has always been a tender subject for me

thanks for helping me out
Click to expand...

OK. If the PSU is fine (as I somehow suspect) then you'll end up with two.
 
johannes said:
OK. If the PSU is fine (as I somehow suspect) then you'll end up with two.
Click to expand...

you think the hiper psu is fine? what else could it possible be after all
the stuff i have tried, the motherboard?
 
Don Freeman said:
But you can buy a 20 to 24 pin cable converter for about $10 (US). I
used one for awhile until I upgraded from the PSU that came with my case.
Click to expand...

i was hoping for instant result sorry, wanted to run down to garage pop out
dud psu pop in old psu and see if it worked in anyway, just to rule out
motherboard failure
 
Christo said:
i was hoping for instant result sorry, wanted to run down to garage pop
out dud psu pop in old psu and see if it worked in anyway, just to rule
out motherboard failure
Click to expand...

I have been using a 20 pin power connection in a 24pin socket
of a A8N-E for a long time now with no problems what so ever.
The extra four pins just allow more current to flow to the PCI-e
slots and USB headers. So, unless you add a card that needs to
draw more juice than a normal card does, or you are running a
coffee warmer off USB power, you will not have a problem.

Luck;
Ken
 
Ken Maltby said:
I have been using a 20 pin power connection in a 24pin socket
of a A8N-E for a long time now with no problems what so ever.
The extra four pins just allow more current to flow to the PCI-e
slots and USB headers. So, unless you add a card that needs to
draw more juice than a normal card does, or you are running a
coffee warmer off USB power, you will not have a problem.

Luck;
Ken
Click to expand...

seriously lol ah well its a bit late to be pottering around in the garage
now
 
Christo said:
I have a new hiper 24 pin psu and if you refer to my earlier post you will
see that i am having problems,

I have a question, would it at all be possible to plug an old 20-pin ATX
PSU into a motherboard that has a 24-pin ATX connector? just for testing
purposes? not for full time use, or is this too dangerous to the rest of
the system?

Any advice greatly appareciated, thanks in advance

Christo
Click to expand...

back to the topic please can i have a definative answer..

can i use a 20-pin psu on a board that requires a 24-pin psu, without using
an adapter?

I want to try bare minimum with this psu to rule out board failure

ie, graphics, mem, cpu, the graphics are pci-e, gf7600gs,

is this ok or not?

please give me an answer

tia

chris
 
Christo said:
back to the topic please can i have a definative answer..

can i use a 20-pin psu on a board that requires a 24-pin psu, without using
an adapter?

I want to try bare minimum with this psu to rule out board failure

ie, graphics, mem, cpu, the graphics are pci-e, gf7600gs,

is this ok or not?

please give me an answer

tia

chris
Click to expand...

You've got answers already.
 
johannes said:
You've got answers already.
Click to expand...

so i have, i tried it and guess what, it didnt bloody work

so i tried the hiper psu i was going to return on my old motherboard (socket
A) and that didnt bloody work, so the way its looking now is the motherboard
is DOA and the PSU is DOA

unless its something else, i really cant be arsed with it, whatever happened
to plugging it all up and it just working like it used too

thanks, im done RMA's both mboard and psu ordered replacements
 
Christo said:
so i have, i tried it and guess what, it didnt bloody work

so i tried the hiper psu i was going to return on my old motherboard (socket
A) and that didnt bloody work, so the way its looking now is the motherboard
is DOA and the PSU is DOA

unless its something else, i really cant be arsed with it, whatever happened
to plugging it all up and it just working like it used too

thanks, im done RMA's both mboard and psu ordered replacements
Click to expand...

OK. Hope you get it sorted out.
 
Christo said:
so i have, i tried it and guess what, it didnt bloody work

so i tried the hiper psu i was going to return on my old motherboard
(socket A) and that didnt bloody work, so the way its looking now is the
motherboard is DOA and the PSU is DOA

unless its something else, i really cant be arsed with it, whatever
happened to plugging it all up and it just working like it used too

thanks, im done RMA's both mboard and psu ordered replacements
Click to expand...

If you mean the "little green light" on the MB didn't come
on with power from a known good 20pin PSU connected,
then it is the MB that is not working. Your PSU is probably
still good.

Luck;
Ken
 
Ken Maltby said:
If you mean the "little green light" on the MB didn't come
on with power from a known good 20pin PSU connected,
then it is the MB that is not working. Your PSU is probably
still good.

Luck;
Ken
Click to expand...

thats what i mean, it will all become apparant tomorrow morning when i get
the new motherboard, had to pay £20 for delivery on a saturday which is
crazy thats what $40 USD? ish alot!!
 
I have a question, would it at all be possible to plug an old 20-pin ATX
PSU into a motherboard that has a 24-pin ATX connector? just for testing
purposes? not for full time use, or is this too dangerous to the rest of
the system?
Click to expand...

I realize it's a bit late now, but ...

If you're just testing the theory that the new 24-pin PSU is dead then you
can certainly connect the old 20-pin PSU -- the 20 pins connect with one end
of the 24-pin connector so that the 4 unused connections are all at one end
(the connector should be keyed so you can't get that wrong).

Do this with no memory, disks, graphics card, etc., connected, and see
whether the standby power LED on the motherboard lights up. If it does with
the old PSU and doesn't with the new PSU then you know that the new PSU is
dead. If it doesn't come on with either PSU then the fault is probably a
dead motherboard, a short-circuit, or a duff fuse in the mains plug.

Be warned, though, that if your motherboard is faulty, or there is a
short-circuit, you might damage the PSU by trying this.

Note that you don't even need to turn the PC on to perform this test, so it
really doesn't matter that the new motherboard may require more power to
*run* than the old PSU puts out. However, you may be able to run the system
off the old PSU. Most 24-pin motherboards will work with only a 20-pin PSU
connection (and others will work with a 20-24pin adaptor). You shouldn't be
able to damage anything by having too little power, but the system may not
run reliably (or at all) -- especially if you have a high-spec graphics
card.

Cheers,
Daniel.
 
Christo said:
I have a new hiper 24 pin psu and if you refer to my earlier post
Click to expand...

Are you too lazy to provide the details here? I know I'm too lazy to
look up your earlier post.
would it at all be possible to plug an old 20-pin ATX PSU
into a motherboard that has a 24-pin ATX connector? just for testing
purposes? not for full time use, or is this too dangerous to the rest of the
system?
Click to expand...

You and all life within a 3-mile radius will likely die within minutesm
while enduring more pain than if you simultaneously passed a kidney
stone, had your teeth pulled, and were Tasered. But more importantly,
no harm will come to your computer because very, very few require the
extra current capacities provided by those four extra wires, so it's
definitely a worthwhile risk.
 
Christo said:
back to the topic please can i have a definative answer..

can i use a 20-pin psu on a board that requires a 24-pin psu, without using
an adapter?

I want to try bare minimum with this psu to rule out board failure

ie, graphics, mem, cpu, the graphics are pci-e, gf7600gs,

is this ok or not?

please give me an answer

tia

chris
Click to expand...

Paul wrote a definitive answer on that

thread:is this FSP power supply any good ? FSP350-60THN-P (or too low
on the 12v?)
ng: alt.comp.hardware.overclocking


thread: 24 pin ATX power vs 20 pin
ng: alt.comp.periphs.mainboard.asus
From what I recall of those posts and googling I had done, the answer
Click to expand...
to your question is Yes (it won't blow your comp up or harm it)..
but there may be a but

Here is a 20-24 pin adaptor, you see it is just aesthetics!!!
http://images.andale.com/f2/101/116/21909058/1125948469723_1128128281276_2.jpg
http://www.cyberresearch.com/images/products/1123634789.300.jpg
archived
http://img100.imageshack.us/img100/3851/ajw2.jpg
http://img153.imageshack.us/img153/7420/bah9.jpg

the 24-20 pin isn't aeesthetics. But that's not relevant to you.


But, I recall from those posts by Paul, something along the lines of,
if you're using PCIe cards or powerful cards then it could potentially
be a problem, I can't remember if it was when using a 24pin PSU in a 20
pin MBRD or a 20-pin PSU in a 24pin MBRD, with an adaptor or without
an adaptor.
But in your case, with/without an adaptor is the same. Only if the
plastic adaptor melts blows it's better than the MBRD connector
melting!
(we're referring to the main connector here when we say 20 or 24 pin,
not the separate 4 pin connector , if there is one).


so, if you plug it in and turn it on, and you don't have nay powerful
cards in there, then, from what I recall from Paul's posts, it will
certainly be fine!!

I also had a problem with a Hiper PSU, 2 infact. there was a time when
they were being recommended by loads of people on uk computer
newsgruops, which is why i bought them.

Don't rely too much on what i've written here. The definitive answer is
in Paul's posts, which i've referenced here. And those pics may help in
interpreting them.
 
On 30 Sep 2006 17:54:06 -0700, (e-mail address removed)
wrote:

But in your case, with/without an adaptor is the same. Only if the
plastic adaptor melts blows it's better than the MBRD connector
melting!
(we're referring to the main connector here when we say 20 or 24 pin,
not the separate 4 pin connector , if there is one).
Click to expand...


If your connector resistance was high enough to cause the
connector to melt, it would already be evident in a lower
measured voltage for that rail.

So as with other PSU qualification, when the connector is
plugged in, system on, voltage readings should be taken.
 
johannes said:
No not really. The 20 pin connector is a proper subset of the 24 pin, but
if the motherboard has a 24 pin connector on board, then it's because it
needs power in the extra 4 pins.
Click to expand...

I built a system just last week and on the mobo there was a piece of tape
covering 4 of the pins on the mobo that said "remove for 24 pin power cable"
(well, not ver batim but something like that). So I think you COULD use a
20 pin PSU...what's the worst that could happen? No power??
 
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