Games that clash with SLI

[Fodder]

Hey guys,

Apologies if this has been posted, I've had a dig around and haven't found anything conclusive. Now, from what I gather some games hate SFR so NVIDIA need to specifically add AFR support for them in the drivers. Yet more games won't work with that either. Why is this? Any specific examples?

Thanks

 

[DOGMA1138]

do you have some sorce for this?

 

[WaltC]

From what I understand, nV SLI is entirely a custom configuration which isn't supported either under the APIs or under an OS. IIRC, The nVidia SLI drivers handle and control the custom implementation exclusively and effectively the SLI configuration "fools" the OS into seeing a single, normal 3d card at all times. Theoretically at least (and practically, too, provided the nV SLI drivers work as advertised), there accordingly should be no difference between running a stand-alone card and an SLI configuration. The onus is on the nV SLI drivers, again, as the weakest link in the chain.

(Apologies if I've forgotten something important or presumptively erred...)

 

[Sxotty]

Walt I have to congratulate you that was the most succint post I have ever seen you write

SLi does fool it into thinking that there is one card like you said, but I wonder how it compares to the new gigabyte card, and if SLi only works for 2 gpus, or is it more scalable than that?

 

[Fodder]

I could've sworn I'd read some posts around here about SLI clashing with situations where data is carried between frames, or somesuch. I'm having a bit of a search now, but no luck so far.

 

[digitalwanderer]

SLi does fool it into thinking that there is one card like you said, but I wonder how it compares to the new gigabyte card

This is a common misconception I either see others making a lot or else I am making, but as I understand it the new Gigabyte dual-GPU card uses SLI in the same way that two seperate SLI cards would...just on one card.

 

[Mintmaster]

I'm not sure how NVidia handles this, but a big problem is render-to-texture, which even AFR can't completely solve. An example is the motion trail effect (often misnamed as motion blur).

Grand Theft Auto 3 and Need for Speed Underground both use this effect. I don't know how NVidia handles it, but in this case the blur might still look similar, just last twice as long.

 

[Jawed]

Walt I have to congratulate you that was the most succint post I have ever seen you write

You didn't see version 1 of his post!

Jawed

 

[Dave Baumann]

I'm not sure how NVidia handles this, but a big problem is render-to-texture, which even AFR can't completely solve. An example is the motion trail effect (often misnamed as motion blur)

We discussed this a few weeks back. Thats basically why there are two modes.

ftp://download.nvidia.com/developer/presentations/2004/GPU_Jackpot/SLI_and_Stereo.pdf