Recent content by Datenschleuder

Another report on AFR stutters - this time with 3DMark Vantage. The real frame rate in this example is more than two times slower every second frame compared to what the frame rate counter suggests!

No, VSync doesn't help. VSync is about aligning the front buffer swap with the vertical blanking interval of the RAMDAC. The vertical blanking interval is homogeneous, but the problem is about an inhomogeneous content update of the back buffer, so it doesn't have anything to do with the problem.

Yes, but I never found SFR usefull with my SLI system. It always performs much worse or doesn't work at all. Also nearly all game profiles I can see use AFR.

Maybe YOU know that now, but this issue is unknown by most people. And even those who are effected and did notice the issue are mostly unaware about the cause. Or can you show me even a single English speaking hardware review site that measures and points at the problem of inhomogeneous...

nitromullet: I think this post brought it to the point already... Inhomogeneous frame rates reduce the quality of the nominal frame rate. So judging the potency of SLI/CrossFire just by frame rate alone is not enough. That's the whole point.

apoppin: Whatever. I am not interested in arguing with characters like you. I put a "I am an evil Intel agent" sticker on and you are happy - OK?

Yeah Jessica, I was posting on this in other forums as well - big deal huh? Congratulations on this earth shattering scandal! :D So I must be an evil Intel agent trying to indoctrinate the internet in a harms way! ROFL keysplayr: Thanks for making the test! Yes, the problem isn't that...

keysplayr: Yes, you are correct on the inhomogeneous frame rates. I have not said that the AFR performance is worse than with single card mode because of this problem, but it eliminates most of its benefits. The frame times are measured with the frame buffer swaps.

Why do you have a problem with the ambition to make this issue known in the scene? You haven't understood what this is about if you believe that this problem isn't important. The performance in a real time application (like a game) is determined by the ability to deliver processed data in...

No, it doesn't. VSync is about aligning the front buffer swap with the vertical blanking interval of the RAMDAC. The vertical blanking interval is homogeneous, but the problem is about an inhomogeneous content update of the back buffer, so it doesn't have anything to do with the problem...

The whole point is that the FPS gain becomes insignificant when the frames are not updated homogeneously. Frame #0: 00.0 ms Frame #1: 00.1 ms should be: 16.6 ms Frame #2: 33.3 ms So in this (exaggerated example): - the frame rate says 60 FPS (1000 ms / (33.3 ms / 2)) - but the...

There are still some real gains with SLI/CrossFire of course. But the point is that these gains are immensely lower than the frame rate improvements over single card setups suggest.

Apparently you don't read my posts at all. I did this in the first post already my friend. I won't waste my time anymore here on replies that only contain wild claims. THANKS for keeping this thread intelligent and reasonable!

So where is your frame time log? Post it please. I am a graphics programmer and looked into this much deeper than just figuring out possible configuration problems. I even got a reply by a Nvidia developer support person and he confirmed the existence of the problem and he said: "we can't...

It doesn't matter, but I run a 8800 GTX SLI system. And this is not just a theory. This was replicated by dozens of SLI and CrossFire users in the linked German forums and the linked German hardware review site as well. Simply test it out on your own. It only takes 5 minutes to do this, so...