Q: My motherboards are K7VT4A+ and K7VM3. During the POST, it shows "Mac address are invalid in both CMOS and DMI. Press F1 to resume". What should I do?(2004/12/15) A: Please try to install your CD-ROM, CD-RW, DVD-ROM, or DVD-RW to primary IDE (IDE1, blue connector) and install your hard drive to secondary IDE channel. If you still encounter problem, please download the tool to rewrite the MAC address from: https://www.asrock.com/support/Download/MACTool.asp