Keep your existing display while using a DisplayPort source with the (DisplayPort to HDMI) adapter from Dell.This adapter enables  you connect your source to an HDMI display.

Display Port to Single-Link DVI-D
Converts a DisplayPort computer output to HDMI
Supports uncompressed High-Definition digital video up to 1080p and up to 1920x1200 computers resolution
Built-in Latch locks the DisplayPort connector in place for a secure fit
Offers DisplayPort Content Protection (DPCP) and High-Definition Content Protection (HDCP)
1 x 20 pin DisplayPort - male
1 x 19 pin HDMI Type A - female
Grade: A
Dell part number: XT623 (or a compatible part number)

• Grade A - Like new or new quality. Little to no wear.
• Grade B - Shows some minor signs of wear.
• Grade C - Shows obvious signs of use.