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8800 GT SLI'd ripping effect

post #1 of 10
Thread Starter 
Hey guys, I was wondering does anyone get the ripping effect that you get if you were to have your Vsync off.

I am running both my XFX 8800 GTs in sli with Vsync on but still notice this ripping effect across my screen while gaming, especially when playing Tomb Raider: Underworld, it is really annoying. Has anyone else notice this in their sli set up and know how to fix this or is this one of the downside of going SLI?
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post #2 of 10
Make sure you have the latest drivers, and make sure when you enable SLI, that you don't select split rendering (I think).
    
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post #3 of 10
Never noticed it with my SLI. What drivers do you have? I have been having issues with the 180 series of nVidia drivers.

It would be great if you could fill out your specs too in the User CP.
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post #4 of 10
Thread Starter 
Can someone post their nVidia control panel settings, maybe a screenshot?

I am using the 180.48 nVidia drivers. What kind of issues are you getting?


Maybe it's just in the Tomb Raider game, it is not optimised for SLI?

Good idea limes i shall do that now.
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post #5 of 10
Here is a great idea on SLI and how it works. I would give the program a try too...
http://www.nhancer.com/
Quote:
Originally Posted by www.nhancer.com
SLI mode

SLI-Mode setting
Two nVidia graphic cards that are linked in an SLI configuration can work in four different modes:

Single
This mode effectively disables SLI. Only one card will be used to render the graphics. If a game doesn't work with SLI at all, use this option.

This is also the usual option to be used in the global settings. Since the correct SLI mode is defined in the game profiles which overrides the global setting anyway, there is no need to set a SLI profile globally.

Auto
This mode tells the driver to select the optimal SLI mode automatically. Unfortunately, this almost never works correctly. It's better to try each of the other two modes, to find out which one works better.

Split Frame Rendering (SFR)
Split Frame Rendering means that each frame is split into two parts, and each card only renders one of those parts. An automated load balancing algorithm makes sure that the work is devided most effectively between the two cards.

This mode is slightly more CPU intensive.

Alternate Frame Rendering (AFR)
When using the Alternate Frame Rendering, each other frame is rendered by one of the two cards alternatively. So one card renders a complete image, while the other card is already rendering the following image.

This mode is very CPU effective. In theory, it can introduce a slight lag (i.e. mouse movements are not as immediate as normal), but this effect is so small, that practically nobody ever notices it.

Alternate Frame Rendering 2 (AFR2)
This is working exactly like AFR. nVidia introduced this setting because it is more compatible with some games.

Since it's just AFR with some compatibility flags set (see below), you can activate AFR2 by clicking the button "AFR2" on the bottom of the list of compatibility flags.

Which one of the two SLI modes is the one to choose depends on the way the game in question is doing its rendering. Even though each mode has advantages and disadvantages, these differences usually don't matter, because it's very rare that both SLI modes are working with one single game. Usually only one mode can be used effectively. Which mode works better with a given game should be figured out by using trial and error.

There are some games, which don't work well in either mode. You can then try to use some of the compatibility flags (see below), and if that doesn't help, this game is not compatible with SLI, at least not unless nVidia creates a special profile for it.
    
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post #6 of 10
Quote:
Originally Posted by CrazYt™ View Post
Can someone post their nVidia control panel settings, maybe a screenshot?

I am using the 180.48 nVidia drivers. What kind of issues are you getting?


Maybe it's just in the Tomb Raider game, it is not optimised for SLI?

Good idea limes i shall do that now.
Yeah I am on the 180.48 ones. Currently formatting I will be installing the ones below again.

Give these a try http://www.nvidia.com/object/winxp_178.24_whql.html

If all else fails you CAN try the 181.00 (If I remember correctly) and heres a link to my rant about crappy drivers...http://www.overclock.net/rants-raves...a-drivers.html
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post #7 of 10
No problems here with SLi and Underworld. Sometimes you need to disable SLi and re-enable it to get it to work.

In control panel I change these settings from default:

In "manage 3D settings"

Multi-display/mixed-GPU acceleration "Single display performance mode"
Texture filtering - Quality "High performance"
Triple buffering "On"

Other then that I leave everything alone. As for nHancer I use to run it with SLi, but this last time I tried it it hendered my SLi scaling.
    
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post #8 of 10
Are your frame rates lower than the refresh rate of your monitor?

If so, you will see tearing even when vsync is enabled.
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post #9 of 10
Thread Starter 
Quote:
Originally Posted by PizzaMan View Post
No problems here with SLi and Underworld. Sometimes you need to disable SLi and re-enable it to get it to work.

In control panel I change these settings from default:

In "manage 3D settings"

Multi-display/mixed-GPU acceleration "Single display performance mode"
Texture filtering - Quality "High performance"
Triple buffering "On"

Other then that I leave everything alone. As for nHancer I use to run it with SLi, but this last time I tried it it hendered my SLi scaling.
So you have no tearing effect in your game graphics while playing in underworld?

Ps. What driver releases are you using?

Quote:
Originally Posted by CapDubOh View Post
Are your frame rates lower than the refresh rate of your monitor?

If so, you will see tearing even when vsync is enabled.
My monitor refresh rate is 60Hz, game fps fluctuates between 21 and 130 depending on the game scene. But I still notice the tearing while I have 130 FPS.
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post #10 of 10
I always play with vsync on. Visibly noticeable difference. A stable FPS is much smoother then letting it jump up and down. Even though the eye doesn't register frames faster then 30FPS, it does notice fluctuations in frame rate.

Been reading a lot about 180 drivers and 8 series in SLi. I'm running 9's in SLi. 180 seems fine as far as gaming goes for me. I have other display issues though.
    
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