Originally Posted by scyy
I've experienced input lag with vsync on pretty much every build I've ever done, along with experiencing some degree of micro stutter in at least some games on every multigpu setup I had used previous to this one. I find it hard to believe it only effect certain configurations when my setups have been so vastly different from eachother yet all exhibit the exact same issue with the exact same setting. I would think just understanding what vsync does would be enough for people to understand why it introduces input lag. In forcing the rendering pipeline to wait for the refresh rate of the monitor it will almost always cause some form of input lag, I think this comes back to peoples ability to perceive it rather than arguing it exists.
I've been building PCs for years, it varies from system to system (And I mean stuff as simple as using MS' USB drivers vs the Motherboard makers, what brand of mouse and keyboard, even stuff you'd think is completely unrelated like sound-cards can make a decent difference, etc) and because there are so many variables involved in it, it's near impossible to control (ie. I'll buy this motherboard because I know that that Network chip causes issues, such as the realtek ethernet drivers increasing DPC latency in Windows) but possible to just get used to or to not notice in the first place.
I only notice it on some games, and in those games I simply deal with it or limit my frames at different values until it's playable and doesn't tear.
For another example on how easily virtually any change can alter whether a game gives you input lag with vsync or not (ie. Because vsync pushes the input latency up uniformly, is the games normal input latency low enough so it's still within the unnoticeable area) I noticed a marked decrease in input lag going from ASUS' official drivers for my Xonar to the custom brainbit ones.
Originally Posted by TomSG
I think what is being misunderstood here is:
Frame tearing is better than v-sync lag.
While I partially agree on that statement. Frame tearing can be extremely minor to extremely bad. V-sync for me has been pretty uniformly bad. I play games competitively, I'm not interested in playing single player AAA garbage, or COD multiplayer, bring on the NS2, QL, TF2. I just can't have mouse lag in these games, hell, I even hate it in point and click adventure games.
The answer to these problems lies in FPS limiting commands. If these arent available, adaptive sync (never tried), 120hz, or living with it are the only options I would recommend.
I also second the notion that all multi-gpu setups stutter and are horrendous. AMD being by far the worst offender here.
Yes, obviously for a competitive player latency is the most important thing...Graphics don't matter as much, look at how popular CS1.6 is still
For those of us who play "single player AAA garbage", tearing completely ruins any and all immersion I had previously every time I've experienced it.