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Single card [x2 vs Crossfire] two cards

Last response: in Graphics & Displays
November 11, 2009 12:46:36 PM

How does software handle a single dual-gpu card (a single X2 series card) compared to a Crossfire/SLI dual-card setup (two cards)??

My question is primarily...

If the game does NOT support Crossfire/SLI (two cards) will it treat the (x2) as ONE card, or will it treat it as two cards and only use "50%" (give or take) of its power??

I want to know because there are plenty of games in which having Crossfire/SLI does absolutely nothing.

If a x2 series (GX2, 4870x2, 5970, 5950) single card is treated by software as a very powerful SINGLE card, then awesome. :love:  If it's the exact same as having two cards in Crossfire/SLI (just saving one Pci-e slot) then that's stupid. :fou: 

Best solution

a b U Graphics card
November 11, 2009 3:46:13 PM

If you have, say a 4870x2 with crossfire on, your computer should treat it exactly the same as if you had two 4870s. The only difference/advantage is the x2 card only takes up one pcie slot.

If using a 4870x2 card on a game that does not support crossfire I can foresee two outcomes:
1) The game gets horrible unplayable frame rates when crossfire is on.
2) The game gets as good/near frame rates as a single 4870 with crossfire on.