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[REV 09]

this tech could be more interesting to me than anything in either next gen console. hope it works as advertised.

 

[Fried Food]

Well, looking at the Internet as a professional analyst: Good news for people who want "LightBoost" style strobing at other refresh rates, to reduce GPU requirements (85fps @ 85Hz) or to reduce input lag (144fps @ 144Hz). G-SYNC's optional superior sequel to LightBoost (optional fixed-rate strobe mode) actually supports strobing at 85Hz and at 144Hz (at least), in addition to existing LightBoost modes (100Hz and 120Hz).

Clues:

1. The G-SYNC upgrade datasheet has 85Hz added.
2. AndyBNV suggested on NeoGAF the low-persistence mode is superior to LightBoost.
3. The YouTube video of John Carmack at G-SYNC launch, was very suggestive.
4. Many articles mentions 85Hz as a CRT frequency that stops flickering for many people.
5. The pcper.com livestream suggests a very high fixed refresh in low-persistence mode.

Upon analysis, both 85Hz and 144Hz are available strobed modes with G-SYNC, in addition to 100Hz and 120Hz. 60Hz has too much flicker, so that mode isn't fully confirmable. Beyond 144Hz is beyond ASUS VG248QE's bandwidth. Other strobed modes might also be available. You heard it first from me.

Awesome!

 

[mdrejhon]

I'm just wondering if someone can explain what Gsync does that a CRT monitor doesn't? If CRT monitors had to be synced to the GPU, what am I missing? Isn't that what Gsync does?

I also never used a CRT monitor so I'm admitting to being out of my element here.

Typical CRT = fixed refresh rate.
G-SYNC = variable refresh rate.

From G-SYNC's perspective them saying "Synced to GPU" meaning the variable timing of beginning a refresh. As a simplified example:
Refreshes no longer need to rounded to next interval (Example: 0/60sec 1/60sec 3/60sec 4/60sec).
Refreshes can be displayed at flexible timing (Example: 0.17/60sec 1.82/60sec 3.50/60sec 4.318/60sec).

 

[mdrejhon]

Two things I've observed.

(1) At least one source mentioned 177Hz support for future G-SYNC monitors, including Guru3D.
I noticed this number exactly matches DisplayPort 1.2 single channel bandwidth of 8.8 Gbits/sec. (half of 17.6 Gbits/sec dual-channel).

1920×1080 x 24-bit x 177 Hz = ~8.8 Gbits/sec

(2) It gets better. When DisplayPort 2.0 rolls around, double the theoretical maximum refresh rate to 354 Hz. Or even if you limit to 177Hz, that could still be useful for faster frame delivery times from the GPU to the monitor, even when limiting the panel's refresh rate. Basically, 1920x1080 frames delivered fully to the monitor in a mere 2.3 milliseconds of frame-delivery lag, regardless of current refresh rate. Basically, you use DisplayPort 2.0 at the maximum dotclock to accelerate frame delivery time to 1/354sec, even if you update the panel at only 144Hz, 177Hz, or 240Hz. Theoretically, you could even have monitor on-board triple buffering, too.

With G-SYNC, the frame delivery time is decoupled from the refresh rate.
During 2014, there is no reason why we can't deliver individual frames to the monitor in 1/354th of a second, even if we send only 144 frames over the cable per second for a 144Hz-capable panel.

 

[GhostRidah]

I wish this was released today, I need to buy a 120hz monitor because im suffering crazy screen tears on most games unless I turn vsync on, I think its because of my 59hz monitor, I am clueless on monitors lol

 

[Tagyhag]

So, I'm an idiot.

These new monitors will also have separate models based on refresh rates right?

Because for my next rig I was looking at a 120hz with 1080p but if these G-synced ones base their refresh rates on your FPS I might just go for a 1440p G-sync model.

 

[mhayze]

I can't believe how excited I am by the prospect of this technology. I kept my CRT until 120hz monitors were available (in conjunction with a 2nd IPS monitor for non-gaming use), and then resisted the urge to get a lightboost monitor, but this is definitely going to make me replace my venerable Alienware AW2310. Now if only someone would release a GSync 120hz IPS monitor.

 

[Durante]

DisplayPort 2.0 has been a long time coming. I hope we finally get it next year, It's the best chance for 1440p (and 4k!) G-sync monitors with fast frame delivery times.

 

[fep]

I have an early Overlord 27" IPS (old bezel).

It would be amazing if Scribby could get something worked out... I'd buy the add-on as soon as it was available.

 

[mdrejhon]

So, I'm an idiot.
These new monitors will also have separate models based on refresh rates right?
Because for my next rig I was looking at a 120hz with 1080p but if these G-synced ones base their refresh rates on your FPS I might just go for a 1440p G-sync model.

Only during G-SYNC mode.

G-SYNC monitors also have fixed-refresh-rate modes too including traditional 60Hz, 85Hz, 100Hz, 120Hz.
In addition to these, G-SYNC monitors also have an optional fixed-refresh-rate low-persistence mode (the LightBoost sequel).