Join Date: Mar 2014
Location: South Australia
The setting they're reffering to pretty much has to be the max pre-rendered frames one as it's the only one I can think of that's been in there that long and directly effects input lag. Pretty sure the default for most things is 3 frames (or at least I remember it being that for gta5) and you can turn it down to 1 frame these days. If you are running at 60fps locked then setting it to 1 frame would reduce your input lag by ~33.4ms.
The key difference here is AMD can reduce it to 0 frames because they still use a hardware scheduler in their gpu designs, while nvidia is stuck with a minimum of 1 frame delay because they do it in the driver on your cpu.