"Non Dell Power Adapter" Error each time i boot M17X R2

Yesterday I got a M17X R2 board and after some stuggle i got the board to post with two 5870m cards and all three fans spinning . but i get the non dell psu error each time i boot and im using a flextronics 240w psu that works flawlessly with an M17x R1 . Furthermore i tried to use a 330w PSU and i got the same error . I still havent installed an OS . Is there any way to fix this? Will i be able to play games and use crossfire with this error? Thanks in advance

PD i will get soon an m18x...

"Non Dell Power Adapter" Error each time i boot M17X R2

"Non Dell Power Adapter" Error each time i boot M17X R2