4096000px vs 2073600px = about a 97.5% increase in view area. Basically look at your system and ask can the GFX card handle rendering about twice the pixels? It is a very very archaic way to think about it but it is a good way to start questioning if you need a new card (or 2). Look at where your card sits while 5 boxing now and just think about the increase and if the GPU and VidRAM would be able to handle the extra load.

A 6970 is a pretty sexy card so I am interested as to how it handles it, keep us updated.