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What Does vsync do?

jmh44's Avatar jmh443/27/15 11:29 am
1 emeralds 222 3
3/27/2015 12:06 pm
jmh44's Avatar jmh44
When i have it on it caps me at 60 frames and when i turn it off it caps at around 200ish frames. Why is this a feature and what is it used for?
Posted by jmh44's Avatar
jmh44
Level 11 : Journeyman Farmer
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03/27/2015 12:06 pm
Level 11 : Journeyman Farmer
jmh44
jmh44's Avatar
i have a nice monitor and gtx 970 so ill just leave it off, im not encountering any screen tearing
1
03/27/2015 11:55 am
Level 57 : Grandmaster Programmer
bmanrules
bmanrules's Avatar
tobbestarkvSync is only usesul to CRT-screens. And what it does is that it freezes the frame before the frame that you are actually looking at and lays that other frame on top of the new one. It get laggier, but makes the fps smoother for CRT-screens


Vsync is useful for all types of monitors - monitors have a refresh rate (normally 60hz or 120hz ), and if a graphics card doesn't output frames at this frequency it'll lead to the monitor tearing, where the new frane will tear over the old frame causing visual artifacts like so.



Vsync fixes this by forcing the gpu to output at the same frequency. However this can lead to lower performance, for example if your monitor is 60hz you'll be limited to 60fps. What you're thinking of is likely re projection or interpolation
1
03/27/2015 11:40 am
Level 44 : Master Architect
tobbestark
tobbestark's Avatar
vSync is only useful to CRT-screens. And what it does is that it freezes the frame before the frame that you are actually looking at and lays that other frame on top of the new one. It gets laggier, but makes the fps smoother
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