Originally Posted by senna89
Lightboost and the new Turbo240 can be run with at least 100Hz refresh rate right ?
1 ) The next G-Synch solution should change dynamically the refresh rate of the monitors so what happen if the game will run for example at 45-50fps ? Lightboost stop to run ?
2 ) With a modern monitor with Lightboost and new Turbo240 by Eizo when game run under 120fps i can set only in-game the Vsynch to 60fps ?
If not i should see tearing and stuttering ?
1) G-SYNC monitors don't combine variable refresh rates AND strobing simultaneously (yet).
It's an "either-or" option:
G-SYNC mode: Variable refresh rate but not strobed (no LightBoost)
Strobe mode: Fixed refresh rate but strobed (reportedly at 85Hz, 100Hz, 120Hz or 144Hz).
2) It depends on what strobe modes the monitor supports. LightBoost only really needed 100-120fps because LightBoost is vendor-limited to strobe at 100 to 120Hz, much like a CRT that's limited to operating at only 100 to 120Hz.
High frame rates on current strobed backlight monitors is a principle of motion clarity:
Low-persistence / impulse displays (strobe/flicker/phosphor/etc) such as Plasma, CRT, LightBoost, Turbo240, BENQ Motion Blur Reduction, etc.
Displays with very sharp motion clarity, means that motion blur is no longer hidden by stutters. Stutters are easier to see at higher framerates on impulse/strobed displays. So you want higher framerates than usual on ALL impulse driven displays (frame rate near refresh rate), to make motion look good. Viewing http://www.testufo.com
on any strobed display, clearly illustrates that frame rates matching refresh rate, looks far better on these displays.
However, strobe backlights are not necessarily demanding on GPU, if lower strobe rates are supported (e.g. 60 strobes per second). The problem is fewer strobes per second causes flicker -- we hated 60Hz CRT's for this reason. It just primarily “visually appealing” with higher frame rates. Thus, that’s why we recommend 120fps@120Hz or 100fps@100Hz. (LightBoost is like a CRT limited to 100Hz to 120Hz). Fortunately, some upcoming strobed displays can strobe at lower rates such as 60Hz or 85Hz, so you have the option of running lower frame rates without motion blur, but with increased flicker. (120Hz flickers less than 85Hz or 60Hz). The big question is which of the new strobe backlights, supprot other refresh rates other than 100Hz and 120Hz? (unlike LightBoost). We'd love to see strobe backlights successfully emulate a 60Hz CRT, so we can run emulators and other lower-powered games.