@kman Oh, if you're using "Borderless Windowed Mode" or "Windowed Mode" then Windows will force a sort of "Fast Sync" -- that will look very stuttery. Digital Foundry talked about this in their V-Sync video -- Fast Sync looks like ass unless your capping to like 3x your monitors refresh, but it is certainly low lag. What they're doing is the the GPU renders frames as fast as it can then when it comes time to refresh the screen they display the most recent and toss out the ones inbetween so you're not seeing linear motion. Just use exclusive fullscreen and either deal with the tearing or use a different form of V-Sync. I honestly have no idea why Microsoft thought forcing jittery fast sync in windowed mode was a """""good idea""""".