I rma"d my motherboard (Asus M2N32-SLI Premium Vista Edition) for a bad bios continuous cmos checksum error message. I reset the jumpers, changed the cmos battery all no good. Sent it back to Asus, and received a new board, the serial numbers were different. Within a few weeks the same issue is happening with the new board. Flashed the bios, reset the jumper, changed the battery. Is there a know issue with this board ?