Pre-rendered Frames (Nvidia Control Panel) - What is it? Quick benchmarks of 1 vs 4

So there is a setting in the Nvidia Control Panel called Pre-rendered frames, what does it do and what should you set it at? If you are like me and you hate input lag then I suggest putting this setting to one, however if a game is glitching with this setting on then I suggest changing it back to the default of use 3d application. It also made a difference in the cinebench openGL test, however YMMV with this setting so be careful. Also my X99S Motherboard has gone out in unspectacular fashion, so I am on the Z87-G45 4670k rig at the moment, am getting a X99-UD4 motherboard in from Gigabyte, so hopefully that works out well, but some of this will certainly make for some juicy discussion. Intro Music - Lensko Cirlces (NCS Release) BGM - Fracx Outro Music - Flight by Tristam and Braken