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SLI, Crossfire, need any special API to take advantage of

Last response: in Graphics & Displays
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A coworker and myself are in a disagreement over whether games or apps can take advantage of SLI or Crossfire tech.

He says the program/software/game must be specifically written to see any speed increase out of SLI.

I disagree. I say the OS sees the SLI cards as just one card and displays it accordingly. He says that a special API or code has to be written to take advantage of the technology of dual/quad cards. He says it won't be able to natively take advantage of the tech till Direct X 10.

Who is right?

Any links to support what I'm discussing here?

Thanks in advance.

More about : sli crossfire special api advantage

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You're both kind of right.

Apps don't have to be written to take advantage of multi GPU technology... it's the driver that does it.

But the driver usually has to be optimized for a game to get real big performance gains. Without optimizations, some games give a negligable advantage.

That's why frequent driver updates help alot, many times they add optimization for SLI/Xfore with particular games in the updates...
 
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