VSYNC-- What is it, and what does it do?
- Thread starter LifesBane(4Corners)
- Start date
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/me loves Vsync
Vertical Retrace (VSync) is a signal that occurs once per screen refresh, when the electron beam on the monitor starts drawing a new frame from the top-left corner of the screen. Usually all programs wait for Vertical Retrace to occur and then flip front and back buffers. This eliminates any "tearing" effects on the screen and results in a steady image being shown. If VSync is disabled, the programs do not wait for the electron beam to finish updating the previous frame but can change in the middle of the refresh, as soon as the back buffer image has been rendered completely.
Basically, it's an image quality feature and usually syncs your framerate to an absolute. Great for screenies (e.g., image quality tests) and just general play (if you have good HW), bad for benching. If I turn it off for UT I notice an unbelievable amount of "tearing", especially when turning 180°. Hope this helps.
Vertical Retrace (VSync) is a signal that occurs once per screen refresh, when the electron beam on the monitor starts drawing a new frame from the top-left corner of the screen. Usually all programs wait for Vertical Retrace to occur and then flip front and back buffers. This eliminates any "tearing" effects on the screen and results in a steady image being shown. If VSync is disabled, the programs do not wait for the electron beam to finish updating the previous frame but can change in the middle of the refresh, as soon as the back buffer image has been rendered completely.
Basically, it's an image quality feature and usually syncs your framerate to an absolute. Great for screenies (e.g., image quality tests) and just general play (if you have good HW), bad for benching. If I turn it off for UT I notice an unbelievable amount of "tearing", especially when turning 180°. Hope this helps.
It's when the top part of the screen is one frame and the bottom is another. It causes a visible difference in the display of the top half of the screen and the bottom.
Yeah when you move your mouse 180 degrees the top and bottom show diffrent frames, its only a spilt secont type thang.
Has never really botherd me, I dont get it too often.
Has never really botherd me, I dont get it too often.