Strange 5v rail

  • Thread starter Thread starter Wad
  • Start date Start date
W

Wad

Hi,



Strange +5v rail readout using both mbm5 and speedfan. Both show a
fluctuation between 2.17 and 5.41 v. I have tested the psu using a
multimeter and everything is good. So I can only assume the mainboard
is giving false readings or there is a problem with the mainboard. The
funny thing is that the system is stable as a rock (e.g. ran Prime 95
for 12 hrs) and there are no apparent irregularities.Theother odd
thing about this mainboard is that in the bios there are only readouts
for +3 and + 12v and combined (i.e.+3 & + 12v) which all register as
"okay". No readout for then 5v rail.

Should I change the board? I am worried that this problem is systemic
of the model and changing it will only produce similar results.

Specs:

AMD 64 3000
Gigabyte K8NS Ultra-939
512 PC3200 Twinmos
1 optical drive
1 x160GB HDD
9700 Pro
Hauppage pvr-250 TV tuner
X-Mystique Sound Card
Antec 430w Blue

Thanks

Wad
 
Wad said:
Hi,



Strange +5v rail readout using both mbm5 and speedfan. Both show a
fluctuation between 2.17 and 5.41 v. I have tested the psu using a
multimeter and everything is good. So I can only assume the mainboard
is giving false readings or there is a problem with the mainboard. The
funny thing is that the system is stable as a rock (e.g. ran Prime 95
for 12 hrs) and there are no apparent irregularities.Theother odd
thing about this mainboard is that in the bios there are only readouts
for +3 and + 12v and combined (i.e.+3 & + 12v) which all register as
"okay". No readout for then 5v rail.

Should I change the board? I am worried that this problem is systemic
of the model and changing it will only produce similar results.

Specs:

AMD 64 3000
Gigabyte K8NS Ultra-939
512 PC3200 Twinmos
1 optical drive
1 x160GB HDD
9700 Pro
Hauppage pvr-250 TV tuner
X-Mystique Sound Card
Antec 430w Blue

Thanks

Wad
Click to expand...

Sounds like a bad regulator or sensor on the board. Before running out
for an RMA, try testing the actual 5V supply coming from the board to
the components connected to the board. Might just be a sensor problem
you could live with for a while.
 
Sounds like a bad regulator or sensor on the board. Before running out
for an RMA, try testing the actual 5V supply coming from the board to
the components connected to the board. Might just be a sensor problem
you could live with for a while.
Click to expand...

Yup... tested it at the ATX connector and everything was good. I
figure your right, just a bad sensor. But I wonder if this is a
problem with all the boards of this type. I can RMA it in a day, but
still its hassle to tear down the case and re-assemble it again. But I
think thats what I will do anyway.

Thanks for your time.

Wad
 
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