GA-x58a-ud3r rev 2 SB over-voltage red led blinks

Have you got both the ATX-20 and 4 pin power connectors plugged into the board?

Yes, I have plugged in the ATX-20-24pin into the board.

There is a second 4-pin that plugs in a different place than the 20-pin. Thought that might be it because I got similar simptoms with my first build. I didn't plug the smaller pin in. Was thinking that the one longer was all that was required. Looking at your board I see an 8-pin that is at the top-left of your board. This is the one I was trying to refer to. The longer and the smaller pins both should be connected.

i have tried plugging in all available power cables... but still the same... i realise that my ATX-20 power connector has an empty pin at pin 20. Wonder could it be the caused for it?

the solution found is to replace the PSU.

I had the same problem and went and bought another psu it did not fix the problem. Any other ideas....