How to connect a third monitor to windows 8

[Jerryred]

Have a HP-1409 running Windows 8 with graphics card AMD Radeon HD 7570. I have connected 3 acer monitors with the proper cables. They all work but only 2 out of the three at one time. Can someone someone tell me how to get all 3 to display at the same time.

 

[k1114]

I've never seen a 7570 with a displayport but you need it for the 3rd display. Does it have dp?

 

[noidea_77]

Depending on he exact model of the card, two ports may share the same signal. Sometimes it's one dvi and a dp or any other combination. The manual should help.