Yes, CS1644A/CS1642A can support the following video inputs constitute

One DVI-D (HDMI), one VGA (DVI-I)

Two DVI-D(HDMI)

Two VGA(DVI-I)

Please note the CS1644A/CS1642A cannot convert DVI to VGA output, so please make sure the monitor connected to the CS1644A/CS1642A must correspond to the video input signal.

For example, if the video input is one DVI-D (HDMI), one VGA (DVI-I), the monitor connected to CS1644A/CS1642A must be one DVI-D (HDMI), one VGA (DVI-I)