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My GSYNC experiences

Soldato
Joined
4 Dec 2002
Posts
14,520
Location
North Lincolnshire
Hi all,

I recently received an asus VG248QE monitor with the gsync module this morning and thought I'd share my experiences with you.

Firstly, I thought the monitor was faulty as the DP cable that comes with it (nvidia branded) was interfering with the gsync module, causing what looked like a memory error (when a gpu is dying) on the left hand side of the screen and menu. Rectified this with a spare DP cable I had lying around, so no issues now.

When I connected the monitor, the nvidia driver immediately recognised it as a gsync enabled monitor and automatically applied it. The vsync tab at the bottom of the 3d settings menu in the nvidia control panel now reads "GSYNC" and is listed as NV recommended. I was warned that if I was to use it with other displays, this would have to be the primary monitor for GSYNC to work with none gsync monitors, although they'd only have normal vsync displayed on them, so a bit of a "logical" yet "non issue".

First game I loaded up was diablo 3, which doesn't work with adaptive vsync at all. GSYNC works, but only with the frame limiter option. If you enable vsync on diablo 3 with gsync enabled, the fps locks to 9...

However, having said that. Locking the FPS to 144 (same fps as the refresh rate), its buttery smooth. Theres absolutely no lag, ghosting or tearing. Theres a really weird sense of motion that I'm just not use to, which is probably because I've always played with vsync enabled, which causes a slight stutter depending on the buffers used (2 or 3 step stutters, look on youtube for some high speed footage to understand it if you aren't sure what I mean).

Second game I tried was Titanfall and my word, its like night and day. The motion is beautifully smooth, absolutely no tearing or stuttering and you can never detect frame rate dips, regardless of how much it fluctuates. The very low latency and lack of ghosting means that you can read players names even when turning extremely quickly, which is definitely something I'm not use to since using LCDs! The level of immersion that gsync offers on this game is truly staggering!

Third game, Battlefield 4. Went on a 64 player server on TDM, ultra everything as usual and had a very similar experience to Titanfall. The frostbite engines animations are extremely fluid when using gsync and the level of immersion is crazy. The only weird thing I noticed is that the pixel crawl effect in the menu is far more noticable on this monitor than it was on my iiyamma 1440p one. Its probably just the difference in resolution, instead of a gsync specific thing, but worth noting. As ever though, the awful netcode on BF4 didn't exactly make it a fun experience, even though the graphics are the smoothest running experience I've ever seen, but thats for another topic.

Not sure I can actually capture the difference in gsync on and off scenarios with my 5D mk iii camera, but I'll have a go at the weekend!

Anyone want me to try any other specific games out with it and see how its affected, if at all?

EDIT:

After trying various games and pushing the extremes of the tech to expose potential flaws, I'll do a pros and cons list for clarity:

PROS
-absolutely no tearing, regardless of framerate (even when your FPS is over your refresh rate by a long way)
-stuttering compared to vsync on is like night and day in terms of improvement
-input lag GREATLY reduced compared to vsync on and the same, if not slightly more fluid, than vsync off
-game immersion due to how nice the picture is really is game changing for me. I don't say this lightly either, but when a game has proper animations that haven't been altered to account for vsync induced lag, theres a big difference in quality. Fast movement that normally causes blur is also massively reduced. Text is completely readable (so gamer tags etc) when moving quickly on the screen, which is a bonus!
-doesn't even require setting up as the driver does it all for you, including changing the settings in the nvidia cp automatically.
-best of both worlds, with a better image quality than vsync on with the input lag of vsync off, with the bonus of zero tearing
-disgustingly good for competitive games, especially FPS

CONS
-expensive, taking a ~£250 monitor and making it £450 isn't cheap
-displayport only. The gsync pcb replaces all monitor inputs and even the audio, meaning that monitors with speakers inbuilt will no longer work properly in regards to sound and you won't be able to plug your games console into the monitor due to a lack of HDMI/dvi etc.
-very limited choice at the moment, with one monitor being on the market at the moment (its excellent though, but still, just the one!) and the DIY kits are like unicorn faeces when trying to find them, then comes the warranty situation if you DIY...
-some games just don't see all the benefits, with assassins creed black flag still having stutter, regardless of gsync on/off. Might be something else on my PC as my opinion on this specific game clashes with reviewers especially, however its what I've experienced so worth noting.
-if you go under 35 FPS, the gsync is forced to replicate the previous frame, creating a stutter unique to the technology. I've experienced this on BF4 using 200% res scaling with ultra settings (including AA). Its very hard to describe what it looks like, but its very disorientating. This forces you to buy a GPU setup that is powerful enough to always remain above 35fps, which for most gamers, isn't too much of an issue, but worth pointing out.
 
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Sounds epic!!!

Can you try a really heavy game like crysis 3 maxed out?

Edit: or maybe bf4 with red scaling at 200%?

What hardware are you using?

Right, just played through the first level of crysis 3 on max everything with 8x MSAA and its smooth as silk. No hiccups, stutter or tearing at all and my framerate was taking a bashing, especially when moving from outdoor to indoor areas + explosion effects. MSI afterburner telling me the fps has changed, plus the difference coil whine noise I have from my pc, are the only two indicators that I've actually "slowed". In reality though, still plays like its framerate capped, just without tearing and stuttering.

BF4 is exactly the same as using no scaling also. Very similar experience to Crysis 3 actually. The thing I will comment on with both is that enabling vsync in game provides a very noticable lag, whilst having it off and gsync enabled in the CP has absolutely none. Can see why they choose this panel for the first "test" with it.

Sounds great, very tempted to get a G-Sync monitor now.

Could you try out Assassin's Creed Black Flag maybe? :)

I'll try that next. I'm only up to a pub fight part (barely played it) so am rather limited in where I can go at the moment on that.
 
Yeah if anyone uses a BenQ stay well away from preset modes thats for sure lol
Yeah screen tear is a hot topic and it sure is user based how much they effected. I played games for years without sync so maybe I just used to it and dont notice it at all.
BF4 and Mantle on the other hand I dont see it at all "See Gameplay"

Can you see screen tear? I have looked and it dont seem to be there lol
https://www.youtube.com/watch?v=n0ODdPlLHOI

Using a mobile phone to capture the footage makes it look blurry and a stutter fest from watching that. I read why you had to use that though so sadly it's hard to make a proper comparison, but I definitely think you'd see a difference if you had a play with a gsync set up. Its very hard to describe what its like in games as they honestly feel so different.
 
Thanks for the insight James j ;)

most of what you say tho is how i felt going from a 60Hz monitor to my 144Hz monitor so for me it's hard to read into what the Gsync is offering over and above 120/144Hz??

thanks for your time writing this.

I've owned a BenQ XT2420T (120hz) and a BenQ 2411T (144hz) monitor and played the games I've mentioned so far on each of them. Theres definitely a difference between having gsync on and off, regardless of the monitor imo. As I mentioned earlier, its hard to describe what the experience is like, but having the monitor only scan the frame when the graphics card has one available means that you see the frames as soon as they are rendered.
 
this throw a spanner in works for me now, had my heart set on getting that new ultrawide LG but your gsync experience sounds awesome for gaming

Due to the issues with my 1440p iiyama, I was considering 4k, but gregs review really turned me off it due to text sizes, plus I was concerned with my 780 tis vram being a potential limiting factor. Due to that, I started looking at pure gaming alternatives.

I'm genuinely surprised how effective it is though. I wasn't expecting to see such a big difference, especially in FPS.
 
That's alright, cheers for sharing your experience with G-Sync - very helpful for people (including me) considering going in that direction :)

Assassins creed black flag is smooth but not ideal if I'm honest. The animations are no were near as smooth as other games, so I'm guessing they've been written to account for vsync lag, which is noted by Nvidia as being the one and only situation were gsync doesn't work as it should when it comes to games (the other being 24 frame per sec videos, as that would equal 24hz, but I think this might have been resolved, need to check though!)

The animations in this feel a bit "juddery", yet enabled normal vsync or disabling vsync and disabling gsync too, makes the animations look as you would expect. Due to that, plus the 60 fps cap, I wouldn't use gsync in this game as it feels weird.
 
James do you use Vsync in other games before Gysnc? or you play with Vsync off?

How does say BF4 compare to having Vsync off and Gsync on?

To use gsync, you'll want vsync off in games and gsync selected in the nvidia CP. Depends on the game mate in regards to using vsync, especially when I had my previous 144hz monitor, as the input lag was noticable with vsync on, meaning I couldn't really enjoy online FPS games unless it was disabled.

Now, having gsync disabled + vsync disabled (just like most people here), lowers the lag definitely, but I get screen tearing and stutter on BF4. Enabling gsync whilst keeping vsync disabled ingame (as mentioned first) lowers the perceived lag even more (seriously) and removes stuttering and tearing completely.

Due to that, theres definitely a difference between gsync on and vsync off settings, especially for users who have multi gpu setups and can pull off some crazy fps without vsync slowing them down, as the more fps, the bigger the falls are in regards to stuttering (say 200 fps in BF4 normal, then a few explosions and your fps hits 90 for a split second, you'll stutter. You won't with gsync)
 
Have you compared single/dual card performance?

The major selling point of Gysnc is smooth performance without the need for high end hardware.

A single 780ti doesn't equate to lesser hardware, but if you could max out C3 for example on 1 card, mins should be well under 60 fps, if it performs as it's meant to then it's looking good as a Gysnc monitor is cheaper??? than a 780ti.

I've not yet no, but I'll have a go at that on friday or saturday, as sadly I've got some work to get on with now. You are right about the major selling point, but the nice thing for people with high end hardware is completely eliminating stutter and tearing, whilst improving latency.
 
Cool thanks
Thats the great thing about Mantle the frame drops are much more smoother I feel when using Mantle on BF4. Unlike DX11 when the frame rate drops like you said you kinder get a slow down effect.
On Mantle this isn't something that happens, from what I understand its something to do with tighter frame latency. You can see that from my Mantle+BF4 videos when one sec I running 180fps and next 120fps it just continues the play smooth.
So yeah I understand what you mean on frame stutter. One Reason I can't wait for DX12 or Mantle to be enabled in more games.

That low latency is what you get with gsync also, so mantle will give you part of the experience already. Its the complete elimination of tearing and stuttering that you'd probably notice from your perspective.
 
Yeah that great enjoy seems Nvidia could have real winner here. Am still hanging on the fence though I think I would have to try it first.
AMD are also coming with something called FreeSync I be buying a new monitor soon once I see 1440p 120hz display so might hang in there to see how freesync comes along.

Aye AMD's freesync could be rather interesting. The gsync module in the back of my monitor is massive (seriously massive) and replaces all of the monitors inputs to a sole displayport. It'll be interesting to see how freesync works as nvidias method is pure hardware it seems.
 
A thousand times sold :D

Could you tell me the vram usage at 200% (4k) scaling? As I could maintain 40+ fps but hit the vram wall quite hard which gave stutter, so wondering if the monitor now managing frame output has removed vram limitations somewhat :)

Also if you get chance can you take some in game recordings (100% scale) with the perfoverlay.framefilelogenable 1 command? Interested to see how its managing frame times is all (add me on steam/origin/BL if you need some pointers on setting it up!)

@shanks, input lag can only be reduced as far as the panel is capable, never eliminated :)

Just tried that for you on a 64 player metro server on BF4, using 200% res scale on ultra (still with 4x aa to hit the vram limit instantly). Framerate shifted between 35 and 63, with the average around the 42 mark.

With gsync on, there was still some stuttering, but its probably more down the cpu than the gpu based on these readings:

Code:
Frame time	 CPU frame	 GPU frame
17.02	7.58	30.37
17.02	26.02	30.37
21.32	7.82	33.13
21.18	26.24	29.97
16.73	7.92	29.36
16.73	26.2	29.36
17.19	7.91	30.2
17.19	26.28	30.2
16.92	8.05	30
16.92	27.19	30
16.88	6.59	31.43
17.24	27.56	30.48
17.43	5.91	32.4
17.55	28.4	30.66
17.25	5.78	30.19
17.1	28.75	30.86
17.23	5.79	32.68
16.98	29.54	30.17

Gsync off however was horrendous and wasn't playable if I'm honest. I took the 4x aa off and kept the 200% res scale, gained about 15 more min fps, yet it still wasn't as smooth as I'd want if I'm honest. The difference between having free vram with gsync and not having the free vram is very different, so bottlenecking the graphics hardware in terms of vram won't do gsync any favours.

Frame times for 100% scaling at 150 fps average btw for comparison with same layout (same file):

Code:
7.2	5	7.96
7.83	6.82	10.95
7.04	6.82	8.2
5.99	6.82	10.53
6.71	6.82	7.86
6.71	5.56	7.86
7.26	6.66	8.3
7.26	7.66	8.3
6.76	6.66	7.86
6.76	7.68	7.86
7.16	5	7.83
7.16	9.06	7.83
7.21	6.67	8.59
7.21	6.67	8.59
7.08	6.68	8.33
7.08	7.46	8.33
6.53	6.58	7.63
6.53	8.09	7.63
7.16	6.58	7.48
7.16	6.43	7.48
7.14	6.58	7.9
7.14	7.66	7.9
6.67	6.58	7.43
6.67	8.73	7.43
7.14	5	7.73
7.14	7.79	7.73
7.39	6.03	7.73

Unsure of exact vram usage sadly as my afterburner decided to have a hissy fit. I've done some shadowplay recording of it though which I'll have a look at now to see if you can see a difference or not.
 
lol :D:D:D

Anyway, you James, are a Legend. I have been hoping a user on here would buy one and give honest feedback and that you have done. A very decent review and good that you point out the bad as well. You are slightly making me regret jumping on a 4K, as I have no more funds available for the G-Sync swift that is "Coming soon" and that was where I was looking.

Thanks for taking the time to do this. How does Bioshock look if you have it and don't mind testing please. That has been one of the worst games for tearing for me, so very interested how that runs.

I've got bioshock installed so I'll have a look in the next hour mate. You have a lot of plus points with a 4k screen though, just as I do having a 144hz gsync one. If the 1440p 120hz gsync monitor is anything like this though, that would be were my money would go tbh as its the best of both worlds.
 
Cheers James. I was tempted to jump on this but then heard of the Rog Swift coming in March/early April, I held off and then the news of Summer at the earliest and seeing that I could grab a 4K for a good price had me sold.

Looking forward to what you think in Bio cheers :)

Fair enough Shankly.

Bioshock is smooth as silk with gsync on with absolutely no tearing. Tried with gsync off (vsync off also) for comparison and I see what you mean about the tearing. I had quite a pronounced stutter in both runs, but it was at exactly the same point, so cpu related no doubt. Benchmark runs show that there are sections were over 100 fps is lost from one moment to the next, so not having tearing in those circumstances is pretty good going in my opinion!
 
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