BababooeyHTJ
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I've noticed it at around 45 fps maybe even more. Its not usually that bad at such a high framerate but its there.
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From 2x 570's to 1x 7970. Could NOT be happier.
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I've noticed it at around 45 fps maybe even more. Its not usually that bad at such a high framerate but its there.
I tried a single 7970 yesterday against my sli setup. The sli setup is by far much much faster then the single 7970 at 2560x1440. The 7970 would get 35-60 frames depending on the map. The sli setup got 55-60 on every map. I notice no micro stutter. The 7970 is getting returned tomorrow....
I'm glad to hear this. I look forward to moving from SLI 570's to a single card. I'll be waiting to see how NVIDIA's flagship single GPU card pans out. After having had SLI 260's, 480's, and now 570's, I believe this is my last multi-GPU rig. I'm driving 2560x1600. And I'd pay 20% more to have NVIDIA's drivers.
Spare-Flair
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570 SLI is starved for vram in triple monitor configurations and also SLI can cause microstutter issues (doesn't affect everyone) that can cause the perception that 60 FPS feels like 30 FPS, etc. It's probably that perception thing that causes the results to swing so wildly from one person to another in terms of satisfaction.
D
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sell the 570s and get another 7970...
lavaheadache
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If you have sli or crossfire then there is microstutter. It is not up for debate. It is there.
Now whether or not you notice it is another story.
http://techreport.com/articles.x/21516/11
Im not sure if that link has been posted in here already but I highly suggest some of you read it.
Now whether or not you notice it is another story.
http://techreport.com/articles.x/21516/11
Im not sure if that link has been posted in here already but I highly suggest some of you read it.
It would be very hard to notice with 3 cards as its virtually gone and even singe cards can displays the same characteristics at times.
Green line is 2 cards and the red 3 cards, notice that the single card blue has its moments as well and that the red deviation is not greater in amplitude than the blue but only continuous, also worse case scenario is at 30fps which most multi GPU users game above.
Drivers, card generation, the actual game and individual setup can effect MS greatly.
3 cards make them cpu bound that is why it seems like the microstutter is gone.
still there.
What game, and more importantly, what kind of clocks for the 7970? The place where the 7970 shines imo is when you start to push it up, as its oc seems to just keep going almost effortlessly.
BababooeyHTJ
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It also more evenly distributes frametimes. Check out the Rage3d article on microstutter. The article is a little old but it still applies just as well today.
There is no way to run Tri-SLI with 560s... but yes with AMD at least, 3 cards reduce micro-stutter down to an imperceptible level to most. My 6970 Tri-Fire setup was absolutely stutter free, and ran BF3 @ Ultra beautifully, including BF3 @ 5760x1080 Ultra without MSAA @ 60fps avg.
My 7970 runs BF3 @ Ultra w/4xAA, etc @ 80fps avg, and never drops below the 40s in heavy combat. I'm running my card at 1300/1700 however
There is no way to run Tri-SLI with 560s... but yes with AMD at least, 3 cards reduce micro-stutter down to an imperceptible level to most. My 6970 Tri-Fire setup was absolutely stutter free, and ran BF3 @ Ultra beautifully, including BF3 @ 5760x1080 Ultra without MSAA @ 60fps avg.
My 7970 runs BF3 @ Ultra w/4xAA, etc @ 80fps avg, and never drops below the 40s in heavy combat. I'm running my card at 1300/1700 however
1300MHZ on air?
lol, there's no way you're getting 60fps avg with SLI 560 Ti's @ 1440p. And btw, you know you can OC the 7970, right? That's it's main advantage. It can be OC'd by nearly 50%, which would easily overtake your SLI setup easily. SLI 560 Ti's barely perform better than a 580, so I know damn well they don't perform better than a 7970, especially OC'd.
I've had SLI 560 Ti's before, and they're slow as hell. When I switched back to my 2 6970s, then 3 6970s, the difference was MASSIVE. Going from my 3 6970s to my OC'd 7970 @ 1300/1700, I'm completely happy. I stay at 80+ fps avg, and never go below 45 in BF3 @ Ultra 4x MSAA.
Yeah, on air. I intend to water-cool soon, and go for 1350 - 1375.
Gotta love the microstutter argument....
"Many people can't perceive it, yet microstutter is still an issue!"
If only a select few people can perceive it, how can it be an issue?! I've been running sli for years on numerous NV cards and I haven't seen microstutter since the NV 7xxx series.
"Many people can't perceive it, yet microstutter is still an issue!"
If only a select few people can perceive it, how can it be an issue?! I've been running sli for years on numerous NV cards and I haven't seen microstutter since the NV 7xxx series.
I'm excited to see what you get with the extra cooling.
Many people don't even understand what microstutter is, so that argument is many times in err. I see all the time in forums "well my setup never stutters, so I don't have microstutter!" which just shows a complete misunderstanding of the concept. Microstutter manifests itself as displaying lower FPS than what the numerical average FPS is thought to be. It's a question of mathematical framerate vs. real framerate.
I didn't say it was gone, maybe try reading, the constant fluctuations clearly shows that its not gone, but the fact is while the fluctuations are constant unlike single GPU they are no greater in amplitude than single GPU, its the amplitude what is seen by the EYE as micro stutter because even a single GPU fluctuates but the amplitude is always minimal, the reviewer came to the same conclusion.
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Who'd a thought 3 6970's would be faster than 2 560 Ti's
If you read what I wrote, I said I went from 2 560 Ti's to 2 6970s first...
Claiming that 2 560 Ti's are faster than an OC'd 7970 is nonsense. You would need to OC the living hell out of the 560s to get anywhere near the 7970, and even then the SLI scaling would have to be perfect.
MavericK
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I bet it's actually not as absurd as you think. Two 570s beat out the 7970 pretty handily.
2 560s are just not going to beat out an oc'd 7970 - the headroom in the 7970s is pretty high, and the 560s are not going to match that.
but here is the problem, i dont believe you.
headroom in vram maybe, but not in raw power.
sidsaccount
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You are a lucky one. My first SLI rig was dual 460 1gbs, and I thought I was going crazy until I started researching "SLI" and perceived choppiness.
Never again. I'm always sticking to one video card.
I read what you wrote and regardless I sure would hope two 6970's would be faster, since they cost more, have more vram and are a higher-end card. Not sure it would be such a surprise.
I never claimed x2 560's is faster, though they are on par at 1900x1080 at least with a 7970 @ stock.
MavericK
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Yup, that'd be about it.
Raw power, too. They won't catch an overclocked 7970, not at all.
MavericK
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No. An OCed 7970 might catch up to *stock* 570 SLI but it's absolutely not this blow-out you guys are imagining.
Stupidly, you can't do a direct comparison on the Anand GPU charts but if you look at both individually you will see.
Ok....
So I can't perceive microstutter, but as long as I have an understanding as to the concept of microstutter it exists....
Sounds a little like the religion....
I can perceive my framerates basically doubling as a result of adding a second card, and in my opinion that makes multi GPU setups extremely worthwhile.
Microstutter will always be there, whether you notice it or not. It's just that some people notice it more than others. I am one of them.
I went from SLI 570s to CF 7970s and microstutter is still there, albeit it's a little bit less with the 7970s. It doesn't really matter since I only notice it above 60fps and my monitor is a 60hz, so I just cap it at 60fps to get buttery smoothness.
I went from SLI 570s to CF 7970s and microstutter is still there, albeit it's a little bit less with the 7970s. It doesn't really matter since I only notice it above 60fps and my monitor is a 60hz, so I just cap it at 60fps to get buttery smoothness.
Ok, so it's there but only a select few can notice it....The rest of us enjoy double the frames and play our FPS games in ignorant bliss....
....You don't think that sounds a little....Odd?!
I'm sorry, call me a skeptic, but in the early days I saw microstutter....I don't see it any more, haven't for a long time.
You don't think that the fact that only a select few see this fabled microstutter in modern CF/SLi based systems tends to suggest that quite possibly the issue may in fact be related to hardware other than the GPU's?
Kinda makes a little more sense than 'multi GPU, must have microstutter - Even if you can't perceive it' doesn't it?
....You don't think that sounds a little....Odd?!
I'm sorry, call me a skeptic, but in the early days I saw microstutter....I don't see it any more, haven't for a long time.
You don't think that the fact that only a select few see this fabled microstutter in modern CF/SLi based systems tends to suggest that quite possibly the issue may in fact be related to hardware other than the GPU's?
Kinda makes a little more sense than 'multi GPU, must have microstutter - Even if you can't perceive it' doesn't it?
Again, just because you don't notice it doesn't mean it doesn't exist. It's like Plasma Tv's for instance, some people can't see phospor trails on a plasma but others do and it annoys the hell out of them and they cant watch Plasma TV's. Yet plasma companies have been working on the problem.
And it's the same with microstutter, both Nivida and AMD have acknowledged that the problem exists and this is as recently as September of last year.
So just count youself lucky you don't notice it.
Well, as I said already both companies have admitted that microstutter is a problem. So it's nothing to do with other hardware. Have you even read any of the other posts in this thread?
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We're talking about 560 SLI, not 570 SLI.
Again, you misunderstand the concept of microstutter. You can't "see" it. All it is is a lower actual framerate than what's being reported in FPS. If you're getting 90 FPS, for example, you may actually be only rendering at a framerate closer to 70FPS, however, that's still more than most monitors' 60Hz refresh rate, so you can't tell the difference. Or, you could be rendering 50FPS, but the actual framerate is at 40 FPS. Many people can't detect or feel the difference between 40FPS and 50FPS.
Microstutter exists because of the nature of Alternate Frame Rendering (AFR), the multi-GPU rendering method that is currently used in multi-GPU systems by both NVIDIA and AMD. Mathematically, it's very easy to model. On a single card, if you render 30FPS, frames are generally drawn ever 33.3ms (in reality it's a little more erratic due to the demands and nature of rendering scenes, but I digress). If you introduce a second GPU to that system, and it has 100% scaling, you may see that the same scene now renders at 60FPS, and we would assume one frame every 16.6ms.
However, this is not what happens. Generally, in an AFR system, two frames are rendered quickly in a staccato fashion, say frame 1 at the 0ms mark and frame 2 at the 12 ms mark, and then there's a lag as the system rebuffers. Since we're seeing 60FPS, it'd be frame 1 at 0 ms, frame 2 at 12ms, and a lag of 21ms. This lag is what drops the actual frame rate, so that it no longer is 60FPS, but actually 47.6FPS (that's 1000/21ms = 47.6FPS). That's what this video showed: http://www.youtube.com/watch?v=zOtre2f4qZs . Again, some people may not notice the difference between 60FPS and 47.6FPS, but it's there, and you certainly aren't getting the "60FPS" performance you think you are.
My 570 has 2.5GB on it. How is that "so little vram"?
FYI: A 1300mhz 7970 is faster than a GTX590 and a HD6990. It's a single GPU too.