Low voltage alart

  • Thread starter Thread starter Craig
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Craig

I keep getting a low voltage alart on my 3.3V. What gets hooked up to the
3.3V? Is that the four prong connecters that I have all my lighted fans and
goodies on? It doesn't do it all the time. Mostly right after it boots,
and lately when I'm playing Halo PC.

Thanks,
Craig
 
Craig said:
I keep getting a low voltage alart on my 3.3V. What gets hooked up to the
3.3V? Is that the four prong connecters that I have all my lighted fans and
goodies on? It doesn't do it all the time. Mostly right after it boots,
and lately when I'm playing Halo PC.

Thanks,
Craig
Click to expand...
The fans are normally on 12v.
3.3v, powers most of the main electronics on the board (PCI slots, quite a
lot of the chipset etc.). Try unplugging the ATX power connector, and
replacing it a couple of times (with everything switched off at the
wall...). It may be as simple as a bit of 'oxidation' on the connector.
Otherwise the voltage is generated/controlled by your power supply, so this
may be showing that it doesn't have much reserve...

Best Wishes
 
The 4 pin drive connectors are +5 and +12 volts but overloading them may be
drawing your 3.3 volts down.
The 3.3 is used on the motherboard and expansion cards. If the computer is
stable you can adjust the alarm point down a bit. How low is it getting ?
How are the other voltages ?
 
Well, the 12V is running about 11.79, the 5V at 5.16 steady, the 3.3V at 3
or less (that's the one that's giving me the alarts). I've seen it dip to
2.8. Could it be my video card? I was playing Halo PC again today, and the
screen will flicker very quickly, then the alart starts going off in the
background. It's and ATI 8500.

Thanks,
Craig
 
Craig said:
Well, the 12V is running about 11.79, the 5V at 5.16 steady, the 3.3V at 3
or less (that's the one that's giving me the alarts). I've seen it dip to
2.8. Could it be my video card? I was playing Halo PC again today, and
the screen will flicker very quickly, then the alart starts going off in
the background. It's and ATI 8500.
Click to expand...


The video card (signalling), RAM and probably some other parts run off the
3.3, the spec says a tolerance of ±5% on that line, you're dipping 15% could
leave with all sorts of problems. Time for a new PSU, methinks.

Ben
 
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