This is the supervisor mode. • The user password gives restricted access to view and change Setup options in the BIOS Setup program. This is the user mode. • If only the supervisor password is set, pressing the key at the password prompt of the BIOS Setup program allows the user restricted access to Setup. • If both the supervisor and user passwords are set, users can enter either the supervisor password or the user password to access Setup. Users have access to Setup respective to which password is entered. • Setting the user password restricts who can boot the computer. The password prompt will be displayed before the computer is booted. If only the supervisor password is set, the computer boots without asking for a password. If both passwords are set, the user can enter either password to boot the computer. • For enhanced security, use different passwords for the supervisor and user passwords. • Valid password characters are A-Z, a-z, and 0-9. Passwords may be up to 16 characters in length. Table 39 shows the effects of setting the supervisor password and user password. This table is for reference only and is not displayed on the screen. Table 39. Supervisor and User Password Functions Password Set Supervisor Mode User Mode Setup Options Password to Enter Setup Password During Boot Neither Can change all options (Note) Can change all options (Note) None None None Supervisor only Can change all options Can change a limited number of options Supervisor Password Supervisor None User only N/A Can change all options Enter Password Clear User Password User User Supervisor and user set Can change all options Can change a limited number of options Supervisor Password Enter Password Supervisor or user Supervisor or user Note: If no password is set, any user can change all Setup options. Overview of BIOS Features 3.11 BIOS Performance Features The BIOS includes the following options to provide custom performance enhancements when using Intel Core i7, Intel Core i5, and Intel Core i3 processors in an LGA1155 socket. • Processor Maximum Non-Turbo Ratio (processor multiplier can only be adjusted down) • Memory multiplier adjustment • Memory voltage adjustment • Graphics multiplier adjustment Intel Desktop Board DH67CL Technical Product Specification Error Messages and Beep Codes 4.1 Speaker The board-mounted speaker provides audible error code (beep code) information during POST. For information about Refer to The location of the onboard speaker Figure 1, page 13 4.2 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS causes the board’s speaker to beep an error message describing the problem (see Table 40). Table 40. BIOS Beep Codes Type Pattern Frequency F2 Setup/F10 Boot Menu Prompt One 0.5 second beep when BIOS is ready to accept keyboard input 932 Hz BIOS update in progress None Video error On-off (1.0 second each) two times, then 2.5-second pause (off), entire pattern repeats (beeps and pause) once and the BIOS will continue to boot. 932 Hz When no VGA option ROM is found. Memory error On-off (1.0 second each) three times, then 2.5-second pause (off), entire pattern repeats (beeps and pause) until the system is powered off. 932 Hz Thermal trip warning Alternate high and low beeps (1.0 second each) for eight beeps, followed by system shut down. High beep 2000 Hz Low beep 1500 Hz Intel Desktop Board DH67CL Technical Product Specification 4.3 Front-panel Power LED Blink Codes Whenever a recoverable error occurs during POST, the BIOS causes the board’s front panel power LED to blink an error message describing the problem (see Table 41). Table 41. Front-panel Power LED Blink Codes Type Pattern Note F2 Setup/F10 Boot Menu Prompt None BIOS update in progress Off when the update begins, then on for 0.5 seconds, then off for 0.5 seconds. The pattern repeats until the BIOS update is complete. Video error On-off (1.0 second each) two times, then 2.5-second pause (off), entire pattern repeats (blink and pause) until the system is powered off. When no VGA option ROM is found. Memory error On-off (1.0 second each) three times, then 2.5-second pause (off), entire pattern repeats (blinks and pause) until the system is powered off. Thermal trip warning Each beep will be accompanied by the following blink pattern: .25 seconds on, .25 seconds off, .25 seconds on, .25 seconds off. This will result in a total of 16 blinks. 4.4 BIOS Error Messages Table 42 lists the error messages and provides a brief description of each. Table 42. BIOS Error Messages Error Message Explanation CMOS Battery Low The battery may be losing power. Replace the battery soon. CMOS Checksum Bad The CMOS checksum is incorrect. CMOS memory may have been corrupted. Run Setup to reset values. Memory Size Decreased Memory size has decreased since the last boot. If no memory was removed, then memory may be bad. No Boot Device Available System did not find a device to boot. Error Messages and Beep Codes 4.5 Port 80h POST Codes During t...
