Dual video cards and dual monitors?

I have dual nVidia 7800GTX video cards in an SLI arrangement. Each card has two monitor outputs. If I use dual monitors, which way would be recommended, to connect both monitors to one card or to put one on each? Would there be a significant performance difference between the two configurations?|||Each monitor on single card, as DirectX doesnt support secondary display directly. benefit is dual screen games with each have their DirectX engine running, hence no lags|||Woo!! fantastic PC



i think it wont matter....coz the output to the monitor IS 1(or is it??)|||Check with nVidia on this one, because the last I checked SLI doesn't support dual monitors.