hi, i have DFI DK 790GX-M2RS mobo but i update it's bios with bios of DFI JR 790GX-M2RS, and now the problem is my GTX 465 VGA does't work but HD3850 works fine. and i tried to update with true version bios by Awdflash, but this error has been occurred "The program file's part number does not match with your system". can anyone help me???
For updating your board with the JR bios you have done something to override this same error message, so you need to flash it back with the DK bios in the same way you did the JR "update". Be it a command-line option or an option in the windows flash utility.
Apart from that, I don't think it will solve your issue, the HD3850 draws 95W maximum, the GTX465 200W, so more likely you are using a underpowered power supply. At the very minimum you need a 550W quality-brand power supply, 600W for some headroom. With quality-brand we're talking Corsair, OCZ or Seasonic.