Here is the press release by Viewsonic:
http://www.viewsonic.com/companyinfo...s_release=2094
Which basically confirms that it has a Dual-Link DVI input, which is more then sufficient for displaying 1680x1050@120Hz. since a dual link DVI input is capable of handling 1920x1200@120Hz. (Single link DVI can only go up to 1920x1200@60Hz.)