Both cards are Sapphire Radeon HD 7970s. www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1443&psn=&lid=1&leg=0
I returned the Viewsonic monitors and went with 3 of these instead with 3 Asus VW246h monitors that have both HDMI and DVI.
From what I understand the Sapphire cards come with Active MiniDispalyport to DVI adapters that I can use.
I am planning to go DVI out on the card to DVI on Monitor 1, then use the first MiniDisplayport to DVI adapter to connect monitor 2 via DVI and repeat for Monitor 3.