3.3V line dropped to 2.3??

[theprophecy]

I just bought an IWill XP333-R board. When I turn it on, within 30 seconds random characters take over the screen, slowly but surely. After watching PC Health, I've found this:

As soon as I get there, as in the time it takes for it to get into the BIOS and me into that screen, the 3.3V line is already at 2.7V. It continues to drop about .04V per second til it hits ~2.3V, then sits there. Meanwhile, the graphical corruption eventually gets too bad for me to even read the screen anymore.

I've read that the 3.3V line controls the graphics card. What caused my power supply, which worked just fine yesterday (400W FuturePower) to suddenly start doing this, and is there anything I can do to fix it?

 

[Texun]

Can't say why it worked yesterday but not today. However, I had a similar problem except my 3.3 dropped to 2.96 and I started getting lines in the monitor. I had a 3 month old Enlight 340W PS. Swapped it out with a generic 500W PS from CompUSA and it did the trick.

The thing that bugs me most is that I ordered the Enlight over the web and have to send it back. I went to CompUSA because they are 10 minutes away, it was Sunday, and I can take this one back if I need to. Even a generic 500W should be okay for what I need. Besides, it was the same price as the 400W and this one has dual fans which improved my air flow and lowered my temps by almost 5C. Wasn't expecting that!

 

[Jhhnn]

I'd try the psu with another board before condemning it, or check the voltage at the mobo plug with a good meter. Some of the recent overclocker boards don't actually use the 3.3v from the supply but rather create it on the board from the 5v feed. I really don't know if your Iwill is one of these, might check at the Athlonmb forums, there was a lot of discussion there about this subject awhile back.

 

[Jerboy]

Verfify with a digital voltmeter. Measure the voltage between the chasis and top of any orange wires on ATX connector.