As of rFactor 2 b982, I seem to be getting pretty-much perfect SLI scaling using the SLI compatibility bits 0x02D04005 (LEGO Batman 2, etc.) - RF2 thread here I decided to try the same compatibility bits with SCE... Interlagos 2 @ 12:00 AM (night time is more graphically demanding) Camaro (headlights on) Cockpit view Maxed out graphics Level 2 AA 6000 x 1080 (5760 x 1080 w/ bezel compensation) Multiview Default SLI Comp. Bits = 0x00000000: ------------------------ Avg: 202.197 - Min: 150 - Max: 267 SLI Comp. Bits = 0x02D04005 (LEGO Batman 2, etc.): Avg: 310.336 - Min: 229 - Max: 406 Wow, fantastic!!! The weird thing (In SCE's case) is that GPU usage was the same in both tests - high 80s to low 90s % for both cards. It therefore seems like GPU usage shouldn't be the only thing looked at when determining SLI GPU scaling.