Originally Posted by Z Overlord
always play with V Sync off, I can't tolerate the feel of the mouse with V Sync on. I play TF2 on my 60Hz LCD with V Sync off and the fps_max set to 132. I have it set to 132 because that is the value where I stop seeing screen tearing.
That's still going to benefit well from LightBoost.
I also agree it is useful to set fps_max to values that aren't harmonics of the refresh rate. On very fast GPU's, fps_max (119,120,121) and (239,240,241) are pretty bad because those leads to stationary or slow-moving tearline effects.
That said, I should mention enabling strobing makes tearing easier to see at higher frame rates, so you may have an incentive to keep raising fps_max to compensate. Note that other odd values such as fps_max 265 or fps_max 344 may look even better, provided you have a GPU powerful enough to typically hit 265fps or 344fps in these older source-engine games.. Larger numbers of smaller-offset tearlines can help make tearing harder to see in these situations, if you have a GPU fast enough to go that far.
Strobing eliminates motion blur to the point that stutters/tearing are easier to see, so you really want good overkill of framerate to compensate. You might not see tearing at 132fps, but you might begin to see it again when strobing is enabled.
That said, try testing out "Adaptive VSYNC" if you are using an NVIDIA product -- it may keep latency low enough to be usable, while eliminating tearing during LightBoost use. Worth trying out, if you suddenly see tearing again during strobing, and can't raise the fps_max any further to compensate. I can see tearing at above 200fps with strobing, at least at certain fps_max values, so you may have to experiment for a new fps_max value. I found setting fps_max to a number above 300 made it tolerable, but your mileage will vary. Sometimes LightBoost just feels too 'jittery' with VSYNC OFF, so I tend to prefer VSYNC ON with strobing. The input lag of VSYNC ON during 120Hz is a lot less than the input lag of VSYNC ON during 60Hz. Someday we'll have 1000Hz monitors, and VSYNC ON will add only 1ms, but until that day arrives, G-SYNC provides a good stopgap of a compromise of eliminating tearing while keeping input lag low...Edited by mdrejhon - 11/29/13 at 8:19pm