Could be a heat issue with the processor, but the 7550 isn't even listed under "cpu support" on biostar's website. You can try a bios flash, but you may already have the latest version. I have your board, and it won't reset the bios using the cmos jumper. You have to remove the battery to reset the bios. Must be a design quirk with the board. I use the sempron 1250LE that came with a frys combo special, and haven't had any special problems.