The message does refer to overheating; thus, due to the fact this is the second board you've had with the same problem, I'd like to first know how your system's set up; hence, please, provide the following:
* Board Altered Assembly Number (AA#):
Note: The AA# is located on a white sticker, right on the board itself (see http://tinyurl.com/6j8nbf). It can also be accessed in BIOS, under Additional System Information (Main Menu; see http://tinyurl.com/m2updf)
* Current BIOS Version:
* Power Supply [please, include the brand, model and wattage]:
* Memory module(s) [please, include the brand, size, frequency and part number of the memory module(s)]:
* Add-in card(s) (please, include the brand and model):
a few hours ago i tested the board with a different power supply and it worked. i guess there is some incompatibility with the first power supply...
first power supply was a coba nitrox 750 Watt (which runs fine in my desktop pc). the second which worked out was a cooler master 500 watt psu.
but anyway... thank you for you answer.