ALL three monitors used DVI, I used a HDMI to DVI and DP to DVI
Computer DVI to Monitor DVI
Computer HDMI to Monitor DVI
Computer DP to Monitor DVI
Also, did you use the DP adapter that came with your GPU or an active one like this?http://www.newegg.com/Product/Product.aspx?Item=N82E16814999030&cm_re=display_port_to_dvi-_-14-999-030-_-Product
For Eyefinity to work (for 3 monitors), you need an active DP connection, not passive (like those adapters generally shipped with GPUs).