Mark Rejhon
[H]ard|Gawd
- Joined
- Jul 6, 2004
- Messages
- 1,395
This is an amazing MONITOR technology that nVidia just invented --
nVidia G-Sync is a variable-refresh-rate monitor technology, that allows the monitor to immediately display frames "on-the-fly" from the GPU. Refreshing of the screen is no longer at discrete intervals! The refresh rate is no longer an exact metronome. The monitor is refreshed synchronously with frame rate!
This is a MONITOR technology, because of custom monitor modifications needed.
New monitors will be required for nVidia G-Sync.
It is a variable-refresh rate technology (asynchronous monitor refreshing!).
Refresh rates are no longer a discrete schedule with nVidia's G-Sync.
Blur Busters has commented on its pros:
http://www.blurbusters.com/nvidia-g-sync-variable-refresh-rate-monitors/
AnandTech has the best explanations (great screenshots of nVidia's powerpoint presentation)
http://www.anandtech.com/show/7432/nvidia-montreal-event-live-blog
Pros:
* The pros of VSYNC ON combined with the pros of VSYNC OFF -- best of both worlds
* Lower input lag at all framerates
* Eliminates stutters during varying framerates
* Eliminates tearing
* Varying framerates now looks much better
Interesting Behavior:
* Display motion blur now becomes directly proportional to framerate. (in non-strobed mode). Display motion blur (sample-and-hold) gradually reduces the higher the framerate you go, up to a certain limit (144Hz). Just like 120fps@120Hz has half the display motion blur of 60fps@60Hz, you now have a continuously variable display motion blur, up to the display's maximum framerate/refreshrate. It's like displays finally got CVT that runs at all times while you play a game. Continuously variable transmission, instead of "gears" (60Hz, 75Hz, 85Hz, 100Hz, 120Hz) that requires you to pause a game to switch.
Cons:
* Motion blur won't be better than LightBoost. At best, it's similar to 144Hz.
..... (until the G-Sync max framerate limit is raised, e.g. future 240Hz/480Hz monitors)
* nVidia Lock-in (which may not be a problem for some)
Wishlist:
* LightBoost combined with G-Sync. Variable-rate strobing is reasonably practical above a certain frame rate (requires ultra-precise strobe modulation to prevent brightness udulations during variable frame rates).
---OR---
* Variable refresh rate monitor with a higher frame rate limit than 144Hz, for PWM-free flicker-free LightBoost-like motion clarity.
This is harder because Flickerfree LightBoost-like clarity won't occur until approximately 400fps@400Hz (and up), and current LCD panels cannot yet be refreshed at that frequency yet.
In fact, John Carmack actually mentioned combining strobing and G-Sync, so it might be eventually possible too. I, of Blur Busters fame, understand the visual science concept of nVidia's G-Sync methodology. It's a good stepping stone to tomorrow's "Holodeck" (unlimited-refresh-rate displays that no longer requires the "CRT bandaid" of strobing to eliminate motion blur) in long-term humankind progress.
nVidia G-Sync is a variable-refresh-rate monitor technology, that allows the monitor to immediately display frames "on-the-fly" from the GPU. Refreshing of the screen is no longer at discrete intervals! The refresh rate is no longer an exact metronome. The monitor is refreshed synchronously with frame rate!
nVidia:
http://www.geforce.com/whats-new/ar...evolutionary-ultra-smooth-stutter-free-gaming
HardOCP:
http://www.hardocp.com/news/2013/10/18/nvidia_introduces_gsync_technology
Blur Busters:
http://www.blurbusters.com/nvidia-g-sync-variable-refresh-rate-monitors/
AnandTech Live Blog:
http://www.anandtech.com/show/7432/nvidia-montreal-event-live-blog
IGN Article:
http://www.ign.com/articles/2013/10/18/nvidias-g-sync-could-eliminate-pc-game-stuttering-forever
This is a MONITOR technology, because of custom monitor modifications needed.
New monitors will be required for nVidia G-Sync.
It is a variable-refresh rate technology (asynchronous monitor refreshing!).
Refresh rates are no longer a discrete schedule with nVidia's G-Sync.
Blur Busters has commented on its pros:
http://www.blurbusters.com/nvidia-g-sync-variable-refresh-rate-monitors/
AnandTech has the best explanations (great screenshots of nVidia's powerpoint presentation)
http://www.anandtech.com/show/7432/nvidia-montreal-event-live-blog
Pros:
* The pros of VSYNC ON combined with the pros of VSYNC OFF -- best of both worlds
* Lower input lag at all framerates
* Eliminates stutters during varying framerates
* Eliminates tearing
* Varying framerates now looks much better
Interesting Behavior:
* Display motion blur now becomes directly proportional to framerate. (in non-strobed mode). Display motion blur (sample-and-hold) gradually reduces the higher the framerate you go, up to a certain limit (144Hz). Just like 120fps@120Hz has half the display motion blur of 60fps@60Hz, you now have a continuously variable display motion blur, up to the display's maximum framerate/refreshrate. It's like displays finally got CVT that runs at all times while you play a game. Continuously variable transmission, instead of "gears" (60Hz, 75Hz, 85Hz, 100Hz, 120Hz) that requires you to pause a game to switch.
Cons:
* Motion blur won't be better than LightBoost. At best, it's similar to 144Hz.
..... (until the G-Sync max framerate limit is raised, e.g. future 240Hz/480Hz monitors)
* nVidia Lock-in (which may not be a problem for some)
Wishlist:
* LightBoost combined with G-Sync. Variable-rate strobing is reasonably practical above a certain frame rate (requires ultra-precise strobe modulation to prevent brightness udulations during variable frame rates).
---OR---
* Variable refresh rate monitor with a higher frame rate limit than 144Hz, for PWM-free flicker-free LightBoost-like motion clarity.
This is harder because Flickerfree LightBoost-like clarity won't occur until approximately 400fps@400Hz (and up), and current LCD panels cannot yet be refreshed at that frequency yet.
In fact, John Carmack actually mentioned combining strobing and G-Sync, so it might be eventually possible too. I, of Blur Busters fame, understand the visual science concept of nVidia's G-Sync methodology. It's a good stepping stone to tomorrow's "Holodeck" (unlimited-refresh-rate displays that no longer requires the "CRT bandaid" of strobing to eliminate motion blur) in long-term humankind progress.
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