Hi,
I frankly don't know why it would do this with your nice job of troubleshooting. I do know that my ASUS board with SLI suggests and has an on-board extra place to plug in a 12 volt connector to the board if you use SLI.
Does yours have that extra connector and if it does, do you have a plug in that slot? Therefore, mine would use the 24 plug ATX, the 12 volt square molex, and the auxillary standard power supply 12 volt plug into the motherboard if using the sli feature. I am not presently using that feature.
I frankly don't know why it would do this with your nice job of troubleshooting. I do know that my ASUS board with SLI suggests and has an on-board extra place to plug in a 12 volt connector to the board if you use SLI.
Does yours have that extra connector and if it does, do you have a plug in that slot? Therefore, mine would use the 24 plug ATX, the 12 volt square molex, and the auxillary standard power supply 12 volt plug into the motherboard if using the sli feature. I am not presently using that feature.