Well thanks again for yout generous answers lol
But I have found the answer to my question.Is there any difference yes big one the input lag on the actual gsync monitor is significantly smaller and also the actual g sync monitor supports gsync ranges from 0 to its maximum refresh rate while on the compatible g sync monitor the gsync range is from 40 to its max refresh rate that means you need to have above 40 fps in game for gsync to kick in on the compatible gsync monitor that sucks what if I can reach just 30 fps.So actuall gsync monitor with installed gsync technology is better than the compatible one,so don't hesitate to buy gsync monitor instead of cheap freesync monitor that supports gsync.The gsync monitor worths the extra money,
Case close
This is incorrect.
Your Asus VG278Q has a FreeSync Range of 40 to 144. What you are neglecting is that it also has LFC (Low Framerate Compensation). Therefore the effective FreeSync minimum is half of the lowest number, so the effective range is actually 20-144.
The way this works is that, if your framerate drops below 40 fps, for example, say it drops to 30 fps like you suggested, the system will do the following:
- It will set the refresh to 2x the FPS, so 60Hz.
- It will display the same frame twice.
So, LFC does the work from frame rates of 20-39, and 40-144 will just be normal FreeSync functionality. You will not see any behavior that is different.
If you go with the PG258Q, you are paying a LOT of extra money for a SMALLER monitor so that you can maintain smoothness just in case your frame rates happen to dip below 20 fps? Why would you buy a 240Hz capable monitor in the first place if you're worried about going below 40fps?
No, the PG258Q in this case is a waste of money.
As for the supposedly greater input lag, I doubt that whoever said that can back this with any kind of proof.