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Old motherboard / modern PSU

  • Asus
  • Motherboards
Last response: in Motherboards
July 23, 2012 8:16:28 PM

Hi all,

Looking for some advice regarding an old Asus motherboard, the P4T-E.

The old PSU is no longer working, while disconnecting it, I've noticed that it has a white wire in the 20 pin connector, that the new PSU doesn't have.

After doing a bit of research I have so far found out that this is probably Pin 20 which carried −5 V for ISA, and therefore redundant. I think the P4T-E only has PCI slots, I'm not aware of any ISA sockets, but I don't really know what one would look like anyway.

So, would the P4T-E still function correctly without this -5v wire, or would it still expect to have that present even if it is without any ISA.....?

Thanks for any help!


More about : motherboard modern psu

a b V Motherboard
July 23, 2012 8:32:59 PM

You should be able to use the new power supply. That -5V is old and the current pin assignment on that same PIN is NC (no connection). Try it, the worst case would be no turn-on.
a c 194 V Motherboard
a b Ĉ ASUS
July 23, 2012 8:36:12 PM

No harm in trying. It will not hurt anything.Worst case it does not work.

I think some old my older PII and III board did have some issues with this.
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July 23, 2012 8:40:53 PM

Thanks maxx_power !

Yes, my concern in this is what I could expect in worst case, not switching on isn't so bad, thanks for your help
July 23, 2012 8:41:59 PM

Thanks nukemaster !