Dell OptiPlex GX240 User's Guide - Page 59

- Primary Video Controller: determines which video controller to use when the computer boots. When Auto is selected, the computer searches first for a PCI expansion card and then for an AGP expansion card. If the computer has only an AGP expansion card installed, the computer uses the AGP card; if the computer has only a PCI expansion card installed, the computer uses the PCI card; and if the computer has both AGP and PCI expansion cards installed, the computer will use both cards. When AGP (the default) is selected, the computer uses the AGP expansion card. - Video DAC Snoop: lets you correct video problems that may occur when you use certain video expansion cards. The default is Off. If you are using a video expansion card and problems such as incorrect colors or blank windows occur, set Video DAC Snoop to On. • Keyboard NumLock determines whether your computer boots with the Num Lock mode activated on 101- or 102-key keyboards (it does not apply to 84-key keyboards). When Num Lock mode is activated, the rightmost bank of keys on your keyboard provides the mathematical and numeric functions shown at the top of each key. When Num Lock mode is turned off, these keys provide cursor-control functions shown by the label on the bottom of each key. • Memory Information indicates the amount of installed memory detected in your computer, the computer memory speed, the amount of video memory, and the size of the display cache. After you add memory, check this option to confirm that the new memory is installed correctly and is recognized by the computer. • PCI IRQ Assignment specifies which IRQ lines are assigned to the Peripheral Component Interconnect (PCI) devices installed in the computer. Press to configure these devices. Then select the device whose IRQ line you want to change, and press the plus (+) or minus (-) key to scroll through the available IRQ lines. Normally you do not need to change the IRQ lines assigned to PCI devices unless a particular device, device driver, or operating system requires a specific IRQ line already in use by a PCI device. • Primary Drive n and Secondary Drive n Primary Drive n identifies drives attached to the primary IDE interface connector (labeled "IDE1") on the system board; Secondary Drive n identifies drives connected to the secondary IDE interface NOTE: For Windows NT, if Primary Video Controller is set to Auto and the computer has both AGP and PCI expansion cards installed, the computer will use the PCI expansion card. Advanced Features 57