You can buy a monitor switch box or a second video card to connect two SVGA monitors to one computer. You'll need Windows 98 or Mac OS 6.0.7 or newer. STEP 1: If you have a Windows computer, see if your current video card can support dual monitors. (Read Microsoft Knowledge Base article 182708 at support.microsoft.com.) STEP 2: If it can't, buy a monitor switch box and connect both monitors to it. Or buy a new video card that has dual monitor ports. STEP 3: If it can, buy and install a second video card. Read "How to Install a Video Card," in the Related eHows, for installation instructions. STEP 4: Reboot the computer. STEP 5: Set preferences for your new monitor in the Monitors or Monitors and Sound control panel (Macintosh) or in the Display control panel (Windows). Tips & Warnings You can replace your current video card with one that supports two monitors instead of adding a second card. (This conserves expansion slots.) You can add a second monitor to most Macintoshes even if your video capabilities are integrated into the motherboard. In fact, a few Macs came with two monitor ports - check your computer's specifications. You must use PCI or AGP slots for both video cards, but you can use different slot types for each monitor. If your PC doesn't have a video card, you can't add a second monitor. You must use SVGA monitors From: http://www.ehow.com/how_13829_connect-two-monitors.html