Why GFX card with more RAM?

[Ataros]

Originally Posted by KG26_Alpha

Interesting stuff Ataros.

It seems since Vista Win 7 triple buffering has had some changes.


"Q
Can anyone let me know whether the triple buffering and vsync in the Nvidia Control Panel work for DirectX games?


A
The 'triple buffering' option does affect rendering behavior within the modern DirectX APIs.
The 'vertical synchronization' control is less cooperative: in Windows XP, it applies to both OpenGL and DirectX 9 APIs; in Windows Vista and Windows 7,
it only affects the OpenGL APIs."

http://forums.nvidia.com/index.php?showtopic=173860

I think he must know what he is talking about

However there are many different opinions and discussions on other forums like guru3D, etc. Some say only OGL lines of code are present inside the drivers.

Another opinion is that an application itself must have triple buffering enabled and some applications enable it by default when a user switches vsynk on inside the app (but not in drivers). Some apps like Left for Dead and BF3 have tripple buffering as a separate checkbox in settings.

We do not know how CloD is programmed and need to benchmark it with various settings to find out. IIRC when I switched vsync ON in drivers I had some issues. Maybe ingame CloD vsync uses TB.

ATI Catalyst still lists triple buffering inside OGL section only. I run vsynk off to be on a safe side. Having TrackIR smoothing set to max helps me to avoid tearing. It still happens but on very rare occasions. Reducing settings also helps with it.

For NV users to be on a safe side I would install D3D Overrider to force triple bufering ON and test it. It is free
Download and install recent RivaTuner, find the D3D Overrider executable inside the install folder and copy it somewhere. you can now uninstall RivaTuner. D3D Overrider does not require RivaTuner to run.

[SEE]

Originally Posted by Ataros

For NV users to be on a safe side I would install D3D Overrider to force triple bufering ON and test it. It is free
Download and install recent RivaTuner, find the D3D Overrider executable inside the install folder and copy it somewhere. you can now uninstall RivaTuner. D3D Overrider does not require RivaTuner to run.

Thanks Ataros. Using the QM 'Intercept Bombers - London' by starting with the comabat scenario and then flying low alt over Tower Bridge/Parliament I tried the following:-

1. Vysinc Disabled. (Pre render frames=1 NVidia CP)

2. Vysinc enabled. (Pre render frames=1 NVidia CP)

3. Vsync Enabled + (Triple Buffering - Pre Render Frames =3 Nvidea CP)

4. Vsync Enabled + (Triple Buffering Forced D3D Overrider).


I expected to see differences in performance but didn't except for Screen Tearining in 1 above. In fact, just having Vsync enabled in 2 above seemed just as good as 3, 4, and 1 but without the screen tearing....

[Ataros]

Originally Posted by SEE

I expected to see differences in performance but didn't except for Screen Tearining in 1 above. In fact, just having Vsync enabled in 2 above seemed just as good as 3, 4, and 1 but without the screen tearing....

I can not say for sure or test it as I have ATI. It may be the case that your CPU is the bottleneck and FPS is limited only by CPU no matter what graphics settings you have. You can try running a track like the Black death with everything maxed out to see if you can stress GPU enough. (However it loads processor too.) Then you can run the same test with tripple buffering.

I mention some tips on running a test here http://forum.1cpublishing.eu/showpos...01&postcount=2

To make sure the performance is not stuck because of your CPU only you can try running the same test in a small window on low settings. If this does not give you big fps increase then it is CPU fault.

PS. Is it necessary to change pre-render frames? IIRC I always have them on auto/default. Increasing them causes input lag. Reducing - reduces performance. I would change it only if I have a very old card. But again for nVidia it may be different.