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Need advice asap, before i throw the power switch

post #1 of 13
Thread Starter 
Have a Dynex 400w PSU
Asus M4a79T Deluxe mobo, Phenom II x3 CPu and an old 5770 and a 4670 GPU, want to make a spare PC.. but the mobo has an 8 pin connector for power, and the PSU has a 4pin, and a 6 pin (what i believe tom be a PCI-E connector..

can i make this work? or do i really need another PSU for this rig, was going to make a small server/possible folding rig to throw in the corner.. let me know =D


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post #2 of 13
You'll need a molex adapter from molex to 8 pin for the processor. Or just buy a new PSU with the necessary plugs.
http://www.amazon.com/ATX-Male-Power-Cable-Adapter/dp/B0063JYZVW/ref=sr_1_3?ie=UTF8&qid=1334222357&sr=8-3
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post #3 of 13
If it fits than it will work.
Edited by charlievoviii - 4/12/12 at 3:07am
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post #4 of 13
Thread Starter 
but there is a 4 pin and 6, leaving 2 pins to hang over.. was not sure that would be ok

it also does not line up correctly, i can fit the 4 pin in there fine it snaps right in, but i cant boot with low power can i?
post #5 of 13
Quote:
Originally Posted by dustin88 View Post

but there is a 4 pin and 6, leaving 2 pins to hang over.. was not sure that would be ok

like i said before "If it fits it will work". that's not the answer you want to hear ?
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post #6 of 13
Quote:
Originally Posted by dustin88 View Post

but there is a 4 pin and 6, leaving 2 pins to hang over.. was not sure that would be ok
it also does not line up correctly, i can fit the 4 pin in there fine it snaps right in, but i cant boot with low power can i?

Not likely. It might not even start the system.
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post #7 of 13
Thread Starter 
ok i got them to line up, 6 pin on the right, and 4 pin on the left with 2 pins hanging off, wish me luck!
post #8 of 13

Do not plug the 6 pin into the motherboard...it does look like a PCI-e power lead.

 

Plug the 4 pin lead into the motherboard, the right side four holes and then see if it boots.

 

Motherboards use to come with 4 pin power connector, then changed mostly to 8 pin power connector, but most PSU's still had the 4 pin leads, motherboard manufacturers would put a removable cap over the left 4 pins.

 

 

 

http://www.playtool.com/pages/psuconnectors/connectors.html

 

right down near the bottom of that page.

 

Here is a removable cap over 4 of the pins on a motherboard.

mobo.JPG


Edited by quakermaas - 4/12/12 at 2:44am
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post #9 of 13
Thread Starter 
Thanks, i did what u said and it booted! now i have an old laptop drive, and i can plug it into my sig rig while its running and it works like USB drive, reads/writes fine, no issue, but i plug it into this PC and it gives a smart error, if i try re installing windows on it do you think it would run?
post #10 of 13
Rep > Quakermaas
Quote:
You can plug a 4 pin 12 volt power cable into an 8 pin EPS motherboard connector but there's no guarantee that it will work. If the motherboard expects only one 12 volt rail then a 4 pin 12 volt cable may work. If the motherboard expects two 12 volt rails (many dual CPU motherboards require one 12 volt rail per CPU) then it won't work. Even if the motherboard works with a 4 pin 12 volt cable, you are still only providing half of the current carrying capacity which would be provided by an 8 pin EPS cable. That can overheat both the motherboard connector and 4 pin cable. Scorched or melted connectors can be a result. A motherboard which has the 8 pin EPS connector expects a lot of current and you are taking a serious risk by plugging in a 4 pin cable. The 4 pin cable only fits at one end of the 8 pin EPS motherboard connector so you can't plug it in improperly. That is, it only fits into one end of the motherboard connector unless you force it. If the cable doesn't go into the socket easily then you're probably trying to plug it into the wrong end. But then again, it's not a good idea to try to run with a 4 pin cable in an 8 pin motherboard anyway.

Great advice Charlie.rolleyes.gif
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