No -5V output from PSU, yet still working

[twinpawer]

Hi!

I have a power supply tester that tests each line of a PSU for the correct rating (voltage). From all the lines, all LEDs are lighting up, except for the -5V. Yet, the computer is still working correctly. I double checked the PSU tester with another PSU, and this one had all lines working correctly including the -5V, so the PSU tester is working well.

What is the -5V line used for? Do I really need it for the computer to run correctly? What can go wrong if I use the PSU which is not outputting -5V on that line?

Thanks in advance!

 

[edijs]

Here's some debate on it.

 

[twinpawer]

put some light on the topic :) So I presume there's no need to worry for not having a -5v line on my PSU.

Thanks!