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3D enabled still causes performance issue in 2D

post #1 of 11
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Hello all, recently I have been trying to resolve poor performance in benchmarks with my 480 since I built my new computer. I could not figure out why it was acting poorly and I resulted in trying an older set of drivers. To my surprise it had done its wonder and the 480 was performing around 20% better, if not more! So, just to see what would happen, I went back to using the 270 drivers, and they were working fine now!
I thought this was just a driver issue, but I was wrong. Its an Nvidia issue

I had not installed the 3D drivers and enabled yet, so I enabled 3D and ran benchmarks again, in "2D" and I began having the same low performance scores!
Then I went back to the Nvidia control panel and disabled 3D, and the performance went up again.

EVEN THOUGH YOU MIGHT BE USING 2D MODE, THE EMITTER STILL RENDERS 2 FRAMES, CAUSING AN INEVITABLE PERFORMANCE LOSS!

So, if you are playing a 3D game, it is what it is and enjoy it, but you should not have to suffer from poor performance playing in 2D. If you are hoping to play in 2D, simply disable Nvidia 3D temporarly and it should be all good.

I also found a reference article:
http://3dvision-blog.com/do-not-hide...-in-normal-2d/
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post #2 of 11
this happens to me also. the best way to play is to turn off 3D vision when you don't need it, and only turn it on when you're going to play with glasses.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by james8 View Post
this happens to me also. the best way to play is to turn off 3D vision when you don't need it, and only turn it on when you're going to play with glasses.
Yup, unfortunately I don't think this has ever been made clear by Nvidia
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post #4 of 11
I suspect the fps decrease in 2D with "stereoscopic 3D" enabled in the control panel is mainly because of v-sync.

This is my observation. With 3D vision on, max fps is 60. With 3D vision off (but still enabled in the control panel), max fps is 120. Do you concur?

When "enable stereoscopic 3D" is disabled in the control panel, v-sync can be turned off. I dont believe the gpu is rendering 2 frames when 3D vision is off (but enabled in control panel). If this was true, then fps in 2D and 3D should be almost identical. right?

Maybe back in 2009, on older drivers, it was true. I have been running 3D vision only since October 2010.

If you have time, run your benchmarks again, with stereoscopic 3D disabled in the control panel, and v-sync forced on.
And share your results. Thanks!
Edited by Partol - 5/14/11 at 9:14am
     
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post #5 of 11
Thread Starter 
Quote:
Originally Posted by Partol View Post
I suspect the fps decrease in 2D with "stereoscopic 3D" enabled in the control panel is mainly because of v-sync.

This is my observation. With 3D vision on, max fps is 60. With 3D vision off (but still enabled in the control panel), max fps is 120. Do you concur?

When "enable stereoscopic 3D" is disabled in the control panel, v-sync can be turned off. I dont believe the gpu is rendering 2 frames when 3D vision is off (but enabled in control panel). If this was true, then fps in 2D and 3D should be almost identical. right?

Maybe back in 2009, on older drivers, it was true. I have been running 3D vision only since October 2010.

If you have time, run your benchmarks again, with stereoscopic 3D disabled in the control panel, and v-sync forced on.
And share your results. Thanks!
I don't think thats particularly true, but its the same general idea. I definitely have seen over 60fps in 3D enabled, and also when I would be getting, lets say, 29 fps at a certain area, with 3D enabled but turned off, I get 23-24.
I've already run benchmarks. Maybe if I get some extra time, I will re-post them here
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post #6 of 11
There is some confusion about fps rates with 3D vision. fps measured "by the game engine" should be no more than 60. fps measured at the monitor should be no more than 120. Both are correct. fps at monitor is double the in-game fps (I think).

I use afterburner to show fps and, afterburner shows me 60fps or less in game with 3D vision on. How do you measure fps?
Edited by Partol - 5/14/11 at 9:39am
     
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post #7 of 11
Good find, got a like +100pt or so boost in my GTX580 3DMark11 score. Just got my 580 yesterday and it seems like a pretty ok overclocker. Still a lot of testing to see if I can squeeze more out of it. My sig is stable though.
Anyways +REP
Edited by LivingChampion - 5/14/11 at 11:19am
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post #8 of 11
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Quote:
Originally Posted by Partol View Post
There is some confusion about fps rates with 3D vision. fps measured "by the game engine" should be no more than 60. fps measured at the monitor should be no more than 120. Both are correct. fps at monitor is double the in-game fps (I think).

I use afterburner to show fps and, afterburner shows me 60fps or less in game with 3D vision on. How do you measure fps?
I use Fraps. It shows dynamic, accurate frame rate on the top corner of the screen.
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post #9 of 11
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Quote:
Originally Posted by LivingChampion View Post
Good find, got a like +100pt or so boost in my GTX580 3DMark11 score. Just got my 580 yesterday and it seems like a pretty ok overclocker. Still a lot of testing to see if I can squeeze more out of it. My sig is stable though.
Anyways +REP
I'm glad it helped!
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post #10 of 11
Quote:
Originally Posted by valfarablaze View Post
I use Fraps. It shows dynamic, accurate frame rate on the top corner of the screen.
My guess is fraps shows the frame rate at the display. This is indeed the true fps which you see (without glasses). MSI Afterburner and EVGA Precision show "in-game" fps, which means fps generated by the game running on the cpu.

I am just trying to avoid confusion in the future. It's well known that v-sync is on when 3D vision is on. And I am 99% sure that v-sync stays on, even when 3D is toggled off via the emitter.

You wont see more than 120fps on a 120Hz monitor with 3D vision on. And that 120fps is actually 60fps from the game, which is doubled (left and right eye) by the gpu to make 120fps (as measured in fraps).
Edited by Partol - 5/14/11 at 12:39pm
     
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