Motherboard -5V is at -8.880V ?

2kwik4u

Reputable
Mar 5, 2014
1
0
4,510
I got some new hardware today and I was wondering if it's normal for the -5V to have a value of -8.880V. I'm a bit concerned since it's the only one that has a bigger value than its label. Here's a screenshot of HWMonitor. If anyone could take a quick look and tell me if it's looking good I would greatly appreciate it, thanks!
http://i.imgur.com/AFUSTvX.jpg
 
Solution
The negative voltages are not always read correctly by the on-board hardware monitors, as they use a couple of resistors to fool an A/D that reads positive values only. Then the BIOS applies an equation to convert the reading to more or less the negative voltage. To really know if the -5V is right or wrong you'd need to use with an external voltmeter.
But don't bother, there is probably no part at all in your system that uses this -5V, as it is a legacy that dates back to the original IBM PC when some memory brands needed that voltage. That explains why the mobo makers do not pay much attention to the precision of this measurement. Also, a higher voltage value may be a "no load" result, as no circuit uses it. So, no problem again.
The negative voltages are not always read correctly by the on-board hardware monitors, as they use a couple of resistors to fool an A/D that reads positive values only. Then the BIOS applies an equation to convert the reading to more or less the negative voltage. To really know if the -5V is right or wrong you'd need to use with an external voltmeter.
But don't bother, there is probably no part at all in your system that uses this -5V, as it is a legacy that dates back to the original IBM PC when some memory brands needed that voltage. That explains why the mobo makers do not pay much attention to the precision of this measurement. Also, a higher voltage value may be a "no load" result, as no circuit uses it. So, no problem again.
 
Solution