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High FPS with SLI system however feels less smooth then a single Card,is this normal? - Page 3

post #21 of 27
Quote:
Originally Posted by killeraxemannic View Post
I am actually interested in that to test on my new crossfire setup. Enlighten me please!
Me too!
post #22 of 27
I'm getting microstutter on my gtx 460 itself (maybe has something to do with CCC drivers..not sure though). It seems to happen more often on DX11 games. Oddly enough, disabling aero seems to help sometimes. Perhaps give it a try if you haven't already? I'd also recommend forcing triple buffering with Vsync through D3DOverrider (available with rivatuner) and see if that makes a difference.

Best of luck!

Oh yeah, not sure if brettjv is referring to this, but there's a program that can measure microstutter here.
Edited by Appletone - 2/8/11 at 2:54pm
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Winny
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post #23 of 27
i had this issue myself...

vsync helps alot...

but try setting the max rendered frames to 0

i found it made it smoother and with less lag on my 2x480s
post #24 of 27
Totally normal, especially with Nvidia multi-GPU setups. ATI finally conquered microstutter with their 4xxx cards, but I hear it's back with their current gen. cards.

Personally, I was shocked at how bad / not smooth my GTX 460 SLI Hawks perform sometimes. Turning V-Sync on helps. With luck, newer drivers will help with microstutter.
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post #25 of 27
Quote:
Originally Posted by killeraxemannic View Post
I am actually interested in that to test on my new crossfire setup. Enlighten me please!
Quote:
Originally Posted by tats View Post
Me too!

Okay ... you guys seem pretty intelligent so I'm not going to like post step-by-step screenies cause I think you'll follow me okay ... it's not rocket science

1) With FRAPS running and set to record frametimes, go into the game in question, hit F11 to begin recording your frametimes to a file (the FPS indicator normally disappears for some reason) and play for a minute or two. Obviously picking a seemingly problematic area in the game makes some sense.
2) The file will get saved at C:\\Fraps\\Benchmarks\\ and should be easy to recognize in there.
3) It's very handy if you have Excel here, as it'll be saved as a .csv which should open cleanly in Excel.

Now, what you'll see is two columns of numbers that look (roughly) like this, only with long decimals on the 2nd column, not integers like this:

Frame | Frametime
1 | 1
2 | 3
3 | 5
4 | 7
5 | 9
6 | 11
...

Note the frametime is cumulative, and like I say it's a long decimal IRL so you want to add a third, calculated column in Column C, with a formula that looks like this: = B2-B1, and copy/paste this formula all down the sheet (except in the first row, for obvious reasons). This will produce a result that looks something like this:

Frame | Frametime | (calc'd)
1 | 1 |
2 | 3 | 2
3 | 5 | 2
4 | 7 | 2
5 | 9 | 2
6 | 11 | 2

Now, look at the values in the third column that you've had calculated.

In the example I gave above, this would indicate a lack of microstutter, since the time difference between when each frame is rendered is 'steady' (it'll never be exactly the same like this, but it'll be reasonably close).

Conversely, if the results look more like this:
Frame | Frametime | (calc'd)
1 | 1 |
2 | 5 | 4
3 | 6 | 1
4 | 11 | 5
5 | 13 | 2
6 | 19 | 6
7 | 20 | 1

where the calculated value steadily fluctuates between a lower number and a noticeably higher number ... this indicates the presence of microstutter
Edited by brettjv - 2/8/11 at 10:46pm
    
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post #26 of 27
Quote:
Originally Posted by brettjv View Post
Okay ... you guys seem pretty intelligent so I'm not going to like post step-by-step screenies cause I think you'll follow me okay ... it's not rocket science
very nice, straight-forward and easy way to collect the data too. thanks brettjv.
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post #27 of 27
Thread Starter 
@brettjv

Once again you come and help me out , man I appreciate the guide, thanks mate.

Thanks everyone for the helpful comments, I'm more at ease now and I'm feeling extra happy today as I got a free 100MHZ boot to my current 4.4GHZ overclock with reduced temps to boost,new bios is the savior

So Yeah I love this system now, I only wish I had more time to game and use it


EDIT: Turning on V-Sync for Starcraft II makes it worse(constant fluctuation 39-60), man I don't know why but this is the only game I'm having issues with.

It is just not smooth enough and I'm definitely not getting the correct performance that I should be getting with my setup.

Edited by Greatskeem - 2/9/11 at 11:58am
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