I also have 3 to the one GPU, HDMI, DVI, DVI. The one on HDMI Windows shows as No.1, the two on DVI are shown as 2 and 3. My post shows on the NO. 2 monitor. If I unplug NO.2 the post moves to one of the other two, the other DVI I think? The actual physical layout on my GPU, from top to bottom is HDMI, DVI, DVI. The bottom most DVI port (closest to the motherboard) is the one the post shows on and the one Windows shows as monitor no 2. Scratches head? lol.