n00b GPU question

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Does Blackops work with 2x nVidia cards (SLI) or is a second/third GFX card only an option with radeon ones?

[zanzabar]

its xfire only or multiple cards but no cross slot sli. im not sure why right now u would want sli though

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would consider sli because I have 1x9800gt and can get a 2nd one cheap, is all.

[Spork!]

OK, another n00b GPU question.
If I get a HD 4870 for my gfx, can I also use the 9800 for physX at the same time? How about if I had Crossfire 2 x 4870 (DDR5 1gb). Could I still use the 9800 as well?

[Sailindawg]

OK, another n00b GPU question.
If I get a HD 4870 for my gfx, can I also use the 9800 for physX at the same time? How about if I had Crossfire 2 x 4870 (DDR5 1gb). Could I still use the 9800 as well?

Only if you run Windows 7 for an operating system. Win 7 allows for different video cards with different drivers.

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well, it's a new comp, so a "new" OS will be installed - currently running on W7 RC and plan on getting a retail copy.
Any advantages to having one card from each camp? Does it use both at once, or just give the option of selecting one depending on application? Would it automatically use the "best" one for a give task? My head aches... Been doing some more research and it seems nVidia cards are still best for folding, so not so sure about changing camps now...