How to Configure CMOS


If you happen to be putting your own computer together from scratch or are upgrading some of the components, you will probably need to configure the CMOS before your computer will work properly. The CMOS controls the basic operations and communication that the various parts of your computer require. CMOS allows you to define what hardware is present, how much memory and what other devices are present.

  • Gather the specifications of your computer hardware. As you progress through the screens in setting up the configuration of your CMOS, you will need these specifications. The first screen you come to will allow you to set the system time and date. You can also set the amount of memory installed, whether there's a floppy drive installed and what type it is.

  • Select the second screen to set the parameters for your hard disks and CD/DVD drives as well as how the computer boots. You set the location used to boot the operating system, as well as set the options for the second and third location to boot from. Some of the characteristics of how the system behaves can be set from this page.

  • Set the video characteristics on the next page. You can choose to use shadow memory or disable on-board video memory. Memory timing can also be set here. On this page, you will designate what type of video card you have installed.

  • Go to the PNP/PCI page. This page allows you to enter legacy products that don't detect under PNP protocols. You can define addresses and interrupts for each card. Once you have made all the settings your system will require, hit the Esc key to take you back to the main menu. Select the option to Save and Exit. The system will then reboot.

  • Re-enter the CMOS setting program and correct any errors if your system will not boot.

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