GENUINE DELL (BIZLINK) DisplayPort to DVI-D Dual-Link ACTIVE USB-powered ADAPTOR CABLE. Built-in Latch locks the DisplayPort connector in place for a secure fit. Supports Computer Resolutions up to 2560x1600 and 1080p HDTV's (N.B. most adaptor cables are PASSIVE, will not transfer QHD+, 2560 res signal).
eBay