I could not determine a latency influence by adaptive sync technologies, no matter if G-SYNC or FreeSync. The rumor that adaptive sync affects the latency could be dismissed to the realm of fables! If you own a G-SYNC monitor, you have a small advantage over FreeSync or G-SYNC compatible devices that do not support VRR. This is because G-SYNC monitors offer variable refresh rates from the first Hz. Thus, 1:0 for Nvidia G-SYNC! But only in this direct comparison MSI Oculux NXG252R vs. AOC 2778VQ. In the next article, the MSI Oculux NXG252R @144 Hz will compete against my LG 27GL850-B @144 Hz with FreeSync Premium, then the cards will be reshuffled. Then it will also be: Nvidia RTX 3000 GPU vs. AMD RX 6000 GPU!
Only V-Sync can mean a total braking of the system latency here. Here, in case of doubt, it is not due to V-Sync itself, but to the 80 cm error. He usually sits in front of the screen! You have to adjust the frame limiter a bit, then it works with the latency.
We also found that the higher the FPS, the lower the latency, still holds true, but not always. If you send about 300 FPS to a 60 Hz monitor, you will have a much worse latency than an owner of a 144 or 240 Hz monitor. Thus technically also a disadvantage, which one can compensate only with very much Skill – a piece! My personal recommendation: For those who want near-competitive gaming, 144 Hz is the new 60 Hz!
If you still own an older FreeSync monitor without VRR, you should always make sure that it doesn’t slip too much below the monitor’s refresh rate. Here it gets pretty weasel-hairy at about 60 FPS on a 75 Hz monitor. This is also unplayable in a single player game. Tearing and other image impairments! Here only the activation of V-Sync helps. If you don’t believe it, please do a self-experiment. Here’s my recommendation: Farcry 5 IGFL at 60 FPS on a FreeSync monitor without VRR. In my case with 75 Hz. Without V-Sync just hell! Unfortunately I do not have any latency measurements for this. But since I have to do more measurements anyway, this special case goes on the to-do list!
Another observation that everyone should take away is the issue of frame limiters. Here I always recommend the IGFL if possible. Provided that the implementation in the game is well done or that a limit is possible at all. There are supposed to still be games without FPS limiting options. Then an external solution must be found! But always keep in mind: Any external intervention slows down the latency! So far I only have the comparison between IGFL and RTSS here, but it already clarifies the issue.
So with that, we have looked at the topic of FreeSync, G-SYNC and V-Sync. A few other findings I was able to work off here in parallel. I have already examined in my measurements here, whether one comes with the IGFL in the GPU limit on the same values, as with activated Nvidia Reflex + Boost. Grin! The topic of full screen vs. various window modes was also very interesting and insightful. There will be another article on both topics in the near future. So it remains exciting.. See you then, I’m off to the forum!
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