CONFIRMED: nVidia G-SYNC includes a strobe backlight upgrade!

When Andy of nVidia was asked whether LightBoost could be combined with G-GSYNC, AndyBNV of nVidia confirmed on NeoGaf:

“We have a superior, low-persistence mode that should outperform that unofficial [LightBoost] implementation, and importantly, it will be available on every G-SYNC monitor. Details will be available at a later date.”.

This scientifically confirms strobing is used, because of law of physics related to display persistence, there is no other way to do LightBoost-matching low-persistence modes without ultrahigh refresh rates (e.g. 1000fps@1000Hz) or frame interpolation (e.g. 200fps->1000fps). Since both are unlikely with nVidia G-SYNC, this officially confirms backlight strobing. In addition, John Carmack confirmed on twitter a better backlight strobe driver is included:

John Carmack (@ID_AA_Carmack) tweeted:
“@GuerillaDawg the didn’t talk about it, but this includes an improved lightboost driver, but it is currently a choice — gsync or flashed.”

Both statements by Andy and John, are confirmations that official backlight strobing (LightBoost) is part of G-SYNC, a 2D motion blur elimination, finally officially sanctioned by nVidia. The question becomes: Can both be combined into adaptive-rate backlight strobing without visible flicker?

It is currently a selectable choice:
G-SYNC Mode: Better for variable framerates (eliminate stutters/tearing, more blur)
Strobe Mode: Better for constant max framerates (e.g. 120fps @ 120Hz, eliminates blur)

UPDATE: Your existing ASUS VG248QE monitor is already upgradeable to G-SYNC!
UPDATE2: The name of this mode is called Ultra Low Motion Blur (ULMB).

About Mark Rejhon

Also known as Chief Blur Buster. Founder of Blur Busters. Inventor of TestUFO. Read more about him on the About Mark page.

13 Comments For “CONFIRMED: nVidia G-SYNC includes a strobe backlight upgrade!”

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It’s a shame that you have to choose between Lightboost and G-sync though.

There really isn’t a CPU-GPU combo in existence that can sustain 120fps or even 100fps in all games at max resolution. Which means that you have to choose between blur and stutter.

Would be nice of the two could be combined, or if Lightboost somehow could be made to work at say 60Hz.


Hmm good to know so G-Sync will let you choose between the two. I still prefer though the strobbing as what annoys me the most isn’t the tearing but much more the motion blur! It’s also nice to know that they say the implementation of the strobbing will be better and this time more “official” so perhaps we will finaly get good colors while using this strobbing mode as right now I’m too scared to buy either a VG248QE or a XL2420TE.

People say about the Asus that it got horrible colors which are even worse with Lightboost while some other says the BenQ got bad ghosting and other things when using LB. Then there is the Samsung which got better colors but much worse input lag according to you, like 20-30ms vs <5ms :/ Either way around I get screwed from what I understand. It's a shame that there is no glossy lightboost monitors. I almost bought a VG236H for 200$ but it didn't support LB.


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