I have a Dell Optiplex with a Radeon 7470 card. I want to be able to have 3 monitors, but apparently cannot do that with only one card. If I get a second 7470 will I be able to diplay on 3 monitors (extended, with 2 different images on each screen). This is for every day office use, not gamin, so I dont need quality, I just need basic functionality. Thank!