netman86

at.... 12V, 5V

1tx... 12v, -12v, 5v, -5v, 3.3v.... im sure im missing a few. As well as the power switch line and whatnot.

IIRC most computers these days pull the voltage for the ram from the 3.3, so trying to run a computer off just 12 and 5 would end poorly

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MibMib

Hi!
About voltages now :
1. +12V - uses by HD(cd, dvd, etc ide-satadevices), intel processors psu, motherboard
2.+5v - uses by HD(and etc ide-sata devices) , amd processor psu, motherboard, some models RAM psu.
3. +3.3 V uses by sata, pci, agp devices AND IN MOST MODELS OF MOTHERBOARDS-RAM PSU!
4.-12V - uses by COM port, Infrared transmitter port, and usart

5. !!!!! -5v - DON'T used now ! typicaly in old systems was used for ISA card devices

__________________
400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

novielo

i noticed in the atx psu pinout that there's a 3.3v sense. what's that for? do i need it to make it work. and does the 5v standby needs to be standby?

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