Low minus voltage readings on TG480-U01 psu

[brasco2006]

I recently bought theTagan power supply TG480-U01 from a UK website retailer called scan.co.uk. After checking the voltage readings with a utility called motherboard monitor, I found the following results:

+12v = 11.98v
+5v = 5.05v
+3.3v = 2.72v

-12v = -7.09v
-5v = -1.25v

The minus voltages seem to be very low. What can I do to solve this problem?

[Hottentot]

I don't think that mobos use the -ve voltages, you only have to worry about +ve voltages. So your +3.3v is low.

http://www.ochardware.com/articles/psuvolt/psuvolt.html

Shows how to check your voltages

[brasco2006]

Just a quick question my mobo EPOX 8RDA3+ has a 20-pin power connector plus a 4-pin power connector. Do I need to have both of these connected to the PSU, becuase at the moment I only have the 20-pin connecter attached? When I try and connect the 4-pin connector the PC won't start.

[alsenior]

get the power supply replaced the people at scan are very good at getting returns done

[Agent]

get the power supply replaced the people at scan are very good at getting returns done

lol

Ignore the readings - especially being from MBM. Results like that are clearly wrong

[Hottentot]

Just a quick question my mobo EPOX 8RDA3+ has a 20-pin power connector plus a 4-pin power connector. Do I need to have both of these connected to the PSU, becuase at the moment I only have the 20-pin connecter attached? When I try and connect the 4-pin connector the PC won't start.

If you have a 4 pin connector on the mobo you should have the 4 pin plug in it. Most mobos won't start without it.

[herulach]

are you using the correct 4 pin connector? Ie the spare one, not the one that is meant to convert the 20 pin to 24pin

[muddyfox470]

-ve voltages are more than likely wrong, or make absolutely no difference, my -12v line is at -3v and it has been no matter what motherboard and power supply i use.

i have not had one bout of system instability so it doesnt bother me, it shouldnt bother you either.

ian

[brasco2006]

Have the 20-pin connector plugged in. The psu comes with an extra 4-pin connector in addition to the 20-pin conenctor for 24-pin mobos. Cos my mobo is a socket A mobo do I need the 4-pin conenctor? I have tried plugging the extra 4-pin connector but the PC won't start with it plugged in. Probably using the wrong one, will take a look at the psu manual for connector details.

[herulach]

Yep theres 2, there will be one cable tied to the 20 pin connector, and a second one labelled p4. you want the p4 one.

[Blitzen]

I recently bought theTagan power supply TG480-U01 from a UK website retailer called scan.co.uk. After checking the voltage readings with a utility called motherboard monitor, I found the following results:

+12v = 11.98v
+5v = 5.05v
+3.3v = 2.72v

-12v = -7.09v
-5v = -1.25v

The minus voltages seem to be very low. What can I do to solve this problem?

The -V's are no longer used and can be ignored. Its the +V's that need to be in their 5% tolerance.

get the power supply replaced the people at scan are very good at getting returns done

Why when there is absolutely nothing wrong??

If it was returned it would be NFF and sent straight back at the OPs expense!

[brasco2006]

The only problem would be that 3.3v positive reading at 2.97v, which seems very low. I have plugged in the P4 connector as well as the power 20-pin connector but the voltages have all remained the same.

[d3fiant]

I appreciate u have a slightly low value but r u experiencing any issues? If not then ignore the reading. Monitoring tools have always been a bit dicey with reporting on voltages, temps, rpm's etc, the same with bios readings.

[brasco2006]

Not experiencing issues but was sort of doing a bit preventative maintenance before problems started appearing. The good thing is that the fan nosie is lower since plugging the P4 conenctor.