brain_stew said:
Well the the mouse lag has never been noticeable to me, which probably has a lot to do with the fact that you get a much better framerate (and thus responsiveness) over standard vsync. So whilst the latency may be an extra frame (or two, not sure which) each individual frame is of shorter length anyway so it usually evens itself out. Though yes, if you're 100% confident you'll always be hitting 60fps (i.e. with older titles) you might as well turn it off, though since I have it enabled globally I can never usually be bothered to edit specific profiles since I don't notice it anyway at 60fps.
I'd never class no vsync as an option tbh, I'd rather gouge my eyes out.
Well, to be fair, a lot of people don't really notice the mouse lag. In the end, it's only 2-3 frames of lag out of 60 (since the frames need to pass through the triple buffer before being displayed). The big issue is the lower your framerate goes, the longer the frames last, and the more input lag will be introduced due to the triple buffering.
I've always had an eye for minute lag and framerate dips and they generally affect me more than most.
With V-Sync + Triple Buffering, I just feel a slight disconnect with my movements...the difference is barely visible, but it's there. It's really only an issue when I need the upmost precision in multiplayer titles. It's also only noticeable in shooters, since those are the only games where the entire screen moves at a fast pace with respect to your mouse movements. V-Sync + Triple Buffering lag is undetectable to me in games like Dawn of War 2, or WoW.
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There's also another issue I've found that can introduce lag. What happens is, a frame can be rendered by a GPU and a CPU independantly. Video card settings let you set it so that the CPU renders ahead of the GPU. I'm not sure what setup causes it, but the rendering of some games seems to tie the input to the CPU rendering, meaning that if your CPU is rendering 3 frames ahead, it may introduce 3 frames of lag. Oblivion was notorious for this.