Com a v-sync ativada, o FPS está limitado à taxa de atualização. então quando o monitor é 60Hz, você só recebe 60fps:
When VSync is disabled, your FPS and refresh rate have no relationship
to each other as such. This lets your graphics card work as fast as it
wants, sending frames to the monitor as fast as it can draw them.
Whether the monitor can actually show all these frames properly or not
is another matter, which we've already discussed above. Clearly if
disabling VSync can cause graphical glitches, however minor they may
be, wouldn't it make sense to always enable VSync so that your
graphics card doesn't wind up wasting its efforts only to generate
more tearing? Well once again, things are not as simple as that.
When VSync is enabled, what happens is that your graphics card is told
to wait for your monitor to signal when it's ready for a new frame
before supplying a single whole frame, each and every time. It can't
race ahead, it can't just pump out lots of partially completed frames
over old ones whenever it's ready - it has to provide a single whole
frame to the monitor whenever the monitor says it's ready to refresh
itself during VBI. The first noticeable impact is that your FPS
becomes capped at a maximum equal to your current refresh rate. So if
your refresh rate is 60Hz for example, your framerate can now only
reach a maximum of 60FPS.
Então, se ele quer jogar a 100FPS, ele precisa de um monitor com um número Hz mais alto. O V-Sync tem alguns problemas, de modo que a AMD e a nVIDIA criaram tecnologias para sincronizar a taxa de atualização e o FPS com valores cada vez mais baixos. AMD o chama Freesync e nVIDIA G-Sync .