Update 5 and a re-install of the latest nVidia drivers did nothing to fix SLI for me with 2x 560tis. SLIbits for Default, Ghosts and BioShock: Infinite varied from not using the other card at all (<5% or so average utilitzation) to about 50% utilization on both cards (but not exceeding 50%, so framerate sagged from 60 most of the time to ~40fps average). 0x020000F5 (Wargame: AirLand Battle, Call of Duty: Black Ops II, TitanFall) is not available in nVidia Inspector.
What am I doing wrong? What should I be trying?