There are actually games, like far cry 3 and watch_dogs, that implement a 1-5 frame buffer selection.
More than 3 should be overkill, unless you have plenty of vram and ideally a 386 or 512 bit bandwith.
The funny thing is, the performance depends on the optimizations the developer team has made to the game engine, and, consequently, on the gpu drivers based on that optimization.
When you consider how many ubisoft games has suffered for months with this, you are left with no choice but to experiment with third party tools. At least with amd gpus.
RadeonPro has saved me more times than i can remember.
gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, xfx HD 5970 + gigabyte HD 5970 (950mhz/ 1100mhz), coolermaster ultimate 900w PSU.
amd catalyst 14.11.2 beta