performance improvement by SLI?

[nodixal]

hey im about to throw in a 2nd 8800GTS 640mb in my rig. im running on a am2 4800+ with 4gb of ram on xp. now my question is, right now i can play on balanced at 1680x1050 once i get the 2nd card in how good will the performance improve? will i be able to play at higher than balanced?