Is there a difference between FreeSync & G-Sync monitors when using an NVIDIA GPU card?

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Hi, everyone!

I wanted to ask about whether using an NVIDIA GPU card would have any drawbacks when utilizing the FreeSync technology compared to using the same card on a GSync monitor?

What I'm curious about is whether or not there would be some input latency (or any type of issue) or something similar when using the FreeSync technology with an NVIDIA card instead of using it with the GSync monitor. And in this case, let's assume that both monitors have the same specifications, (resolution, refresh rate, response time, etc.), the only difference being that one has FreeSync, and the other GSync.

Have there been any comparisons on whether or not FreeSync or GSync is better? And are there any differences when using FreeSync with NVIDIA's GPU card compared to using GSync with the same card?

If there is a difference, how big is it? Is it negligible, or is it quite noticeable?

The monitor that I use is Asus MG279Q, a FreeSync monitor, and my GPU is GTX 980 Ti, which cannot utilize my monitor's FreeSync feature as that's only available from RTX 10xx (or newer) cards. However, I do plan to upgrade soon to a 30xx (or even 40xx) RTX card.

Now, I'm curious, but with all this info, would it be worth it to sell my monitor and go with a G-Sync monitor, or should I save myself the money and just enjoy my monitor as is (which I'm very pleased with)?
 
How much you notice it is going to be somewhat subjective and also depends on the quality of the monitor and adaptive sync implementation for instance my Philips 436M6 only has an adaptive sync range of 48-60Hz but actually works pretty well, especially as they've done a good job of keeping the overall monitor response consistent - while other FreeSync displays with only a 48-60Hz range can exhibit noticeable flicker/dimming, latency or other limitations. (Bare in mind I have a bunch of displays both G-Sync and adaptive sync based to compare - though I mainly use the Philips 436M6 and Dell S2716DG for my day to day use).

Ultimately adaptive sync is somewhat of a hack making use of features like panel self-refresh which were not implemented with this kind of use in mind, so it kind of works but has some limitations compared to G-Sync such as low frame rate recovery situations where FreeSync will have 1-3 extra frames of latency compared to G-Sync (not a problem if you are consistently getting good performance however) or support for non-exclusive fullscreen mode games and apps - however that advantage is somewhat eroded by Microsoft messing about with Windows breaking compatibility :(

Proper G-Sync has dynamic variable overdrive which allows the pixel response to be tuned for the current update rate better - adaptive sync can't adjust it on the fly so you get instances of overshoot or trails resulting in worse motion clarity/stability than G-Sync however on the other hand it can result in shimmering in whites on G-Sync monitors (I believe the screen door artefacts seen on some monitors are related to it as well) and result in a marginally worse experience for watching video content on G-Sync displays.

Some people will notice the differences more than others.
 
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Yes. I've found g-sync module to be a much better experience vs plain freesync, mostly due to the dynamic overdrive and no flickering due to low framerate compensation.
 
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