Answer: G-Sync is definitely worth it if you have an NVIDIA GPU and are looking for a monitor with a high refresh rate. If you've ever thought about getting a monitor with a high refresh rate, like a 144Hz or a 240Hz one, you've probably noticed that a fair number of them come with something called G-Sync. Likewise, does G-Sync really make a difference?
Generally, most G-SYNC monitors are not worth it.
In many cases, for the extra price you'd have paid for a G-SYNC monitor in comparison to its Adaptive-Sync counterpart, you could simply buy a better display with FreeSync/G-SYNC Compatible.
Subsequently, question is, do I really need G-Sync or FreeSync? If you want low input lag and don't mind tearing, then the FreeSync standard is a good fit for you. On the other hand, if you're looking for smooth motions without tearing, and are okay with minor input lag, then G-Sync equipped monitors are a better choice.
Keeping this in consideration, why G-Sync is bad?
G-sync eliminates screen tearing, which occurs when your gpu is putting out more or less FPS than your max refresh. So on a 60hz monitor without gsync, unless you are running EXACTLY at 60fps (so even 59 or 61fps) you will get screen tearing (which you can google examples of) which is very annoying and jarring.
Do pros use Gsync?
Some of the pros currently using g-sync include, ninja, tfue, replays, all the liquid boys with their AW2518H, HD, symfuhny, nick eh 30, just to name a few you get the point.
Related Question Answers
Does Gsync lower FPS?
G-Sync, as far as I know, had virtually no impact on FPS. G-Sync helps to reduce screen tearing and ghosting. It also will make any fluctuation in FPS look smoother. Is a 240Hz monitor worth it?
It's difficult for the human eye to notice a difference between 144 Hz and 240 Hz. As such, 240Hz monitors won't appeal to the average person, but if you can see the difference and you find that it helps you perform better in games or just makes them more enjoyable, then a 240Hz monitor will be well worth the expense. Is Gsync good for fortnite?
If you are playing fast paced games such as FPS games or racing games then yes, G-Sync might be worth your time. If your GPU is producing 200fps on Fortnite, but your monitor is only a 144hz monitor, then G-Sync isn't going to stop all the tearing because your frame rate is above your monitors refresh rate. Does G-Sync matter at 144Hz?
So to answer your question, YES there is a difference between a 144hz monitor with and without GSync. If your monitor does not have GSync and your GPU is unable to produce 144FPS, you will notice tearing. Why are G-Sync monitors so expensive?
I guess, the core difference between Nvidia's G-Sync display technology and AMD's FreeSync is that G-Sync is a closed technology, which means that in order to get it, you need to go to Nvidia for the special hardware which is and can only be developed by them, thus increasing the price point of the hardware. Is G-Sync better for FPS?
It's worth noting while G-Sync locks the frame rate to the upper limit of the monitor Freesync can bypass this and give you higher frames. This would result in some tearing as your frame rate and refresh rate wouldn't match but would keep input lag very low. Does Gsync affect performance?
Well, according to G-Sync does not affect performance in games. It does not add extra input lag nor other performance hits. Can Gsync cause stutters?
Turning Gsync on is actually causing frametime spikes and fps drops. Leaving every other setting exactly the same and just changing the gsync on / off produces these stutters 100% of the time. Is Gsync bad for competitive gaming?
G-Sync operates within the monitor's refresh rates, so that means lower FPS, and it introduces a small amount of input lag*, so it's not an option for most pros. G-Sync's point is to make games more enjoyable by reducing stutter, getting rid of vsync input lag, and eliminating tearing at the same time. Is Gsync good for Valorant?
Should I Turn GSync On or Off for Valorant? Generally, Valorant is already optimized for the highest possible frame rates, and GSync only improves individual cases. The sync of refresh rates and frame rates causes input lag, which has a much more negative impact on performance than occasional screen tearing. Can you run FreeSync with Nvidia?
Now, any 10 series Nvidia graphics card and above that's capable of supporting G-Sync as standard can benefit from FreeSync panels, enabling the feature in the monitor's settings. Will PS5 use FreeSync?
FreeSync on Xbox consoles does need to be enabled in the dashboard settings as it does not automatically switch on even when connected to a compatible FreeSync display. The PS4 does not support VRR but the PS5 can support the feature through its HDMI 2.1 port. However, Sony hasn't activated the feature yet. Do pros use FreeSync?
No pro use G-Sync or Freesync. What do I do if my monitor doesn't have Gsync?
If the Setup G-Sync option doesn't appear after you've performed the above steps, go to the 3D Settings field, and click Global. Scroll down to Monitor Technology, and choose “G-Sync Compatible.†That's it! You can now run G-Sync on your FreeSync monitor. 
