Re: What is specifically needed for more than two monitors?
You do not nessesaryily need 2 video cards.
ALL AMD cards now do eyefinity and so can output 3 screens. Some can do 5 screens, but they are a bit pricey.
Now if you have a motherboard has 2 pci-e x16 slots, x16 or x8, you can use 2 video cards, which can be different models but same brand, amd or nvidia.
Also you can do as many monitors as there are main out puts. A card might have 3 outputs, 2 dvi 1 hdmi, but it only has 2 useable output at a time. So 2 nvidia cards can do 4 monitors.
If you want, post up your motherboard, power supply and what you want to use the screens for, someone can show you what your options are and why.
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