NTI VOPEX-DVI4K-2 4K DVI/HDMI Video Splitter - 2-Port
Amazon.com: DVI Splitter 1 in 2 Out 2 Port DVI Dual Monitors Distribution Duplicator Video Splitter (EDID Management) Support Resolution up to 4K2K/30HZ for PC Laptop DVR Projector HDTV : Electronics
StarTech.com VHDCI to Quad DVI Splitter Breakout Cable - VHDCI (M) to 4x DVI-D (F) - Connect 4 DVI-D displays to your VHDCI video card - DVI Cable - VHDCI Graphics Card