+12v power connector

[chris]

i have just upgraded to a GA-K8NS PRO mainboard and installed it without a
glitch, went ahead and installed windows and drivers etc.

THEN

i was looking in the manual for something and noticed the +12v power
connector and it says that the bord will not boot if this is not connected.

the thing is - i didnt have it connected - i have connected it noe and
system still works the same - what is this plug for ?? and why does the book
say it must be connected for the system to boot??

thanks

 

[Dee]

i have just upgraded to a GA-K8NS PRO mainboard and installed it without a
glitch, went ahead and installed windows and drivers etc.

THEN

i was looking in the manual for something and noticed the +12v power
connector and it says that the bord will not boot if this is not connected.

the thing is - i didnt have it connected - i have connected it noe and
system still works the same - what is this plug for ?? and why does the book
say it must be connected for the system to boot??

thanks

The 4-wire +12v lead supplies power directly to the CPU. It is supposed
to ensure the CPU has adequate and stable voltage. Most MBs will boot
without that line connected and a few will not.

 

[chris]

i thought it might be something like that

Thanks

 

[Satan's Little Sister]

Thus spake chris:

what is this plug for ?? and why does the book
say it must be connected for the system to boot??

The pin in the ATX connector are only rated for 6 amps each. Since
most current boards power the CPU voltage regulators from 12V - and
there's only one 12V line in the ATX - the standard ATX connector
would limit CPUs to around 65 watts.

By adding in that auxiliary 12V connector, with an extra pair of 12V's
and grounds, the CPU can get its power without exceeding the
connector's rating.

For what it worth, you CAN get more than 6 amps per pin through the
ATX, but trying to draw more current increases the voltage drop across
the connector and risks having the connector over heat, melt, and
burn.

http://www2.arnes.si/~mlivak/burned atx2.jpg
http://www.halfdone.com/personal/jo...urning_and_exploding/Burned_ATX_connector.jpg

 

[anthony]

yup must agree on the over heating I installed the connector and my board
temp went straight down lol I forgot to connect it heck I dont remember
seeing it lol


Anthony