Keep your existing display while using a DisplayPort source. With the DP2VGAF (DisplayPort to VGA) adapter you can connect your DisplayPort source to a VGA display. This adapter supports resolutions up to 1920x1200 and allows you to take full advantage of your VGA capable display.
For exceptional quality, upright compatibility and reliability use this A/V Cable
DisplayPort and VGA ports for instant connectivity
1 x 15-pin HD-15 Female Video establishes rapid connection with an audio/video device