Use one USB 3.0 port to add two additional monitors up to 1080p
 
UDV-102
USB3.0 DVI/HDMI Dual Adapter
EACH
$
109.95
6 in stock
Utilizing the high bandwidth capacity of USB 3.0, this device allows you to extend your desktop across two extra monitors without installing another video card. It provides one DVI-I output and one HDMI output from a single USB 3.0 connection.