two graphic cards

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  1. No. Using two PCI-E x16 graphics cards would require that the motherboard have two PCI-E x16 slots and your motherboard only has one.

    If you're just swapping one video card for the other then sure go ahead.
  2. Actually you don't need two 16x, tw 8x lane would be find and you can xfire a 7750 but I'm not sure about the 7450. Not sure why you would bother though.

    http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg
  3. ikaz said:
    Actually you don't need two 16x, tw 8x lane would be find and you can xfire a 7750 but I'm not sure about the 7450. Not sure why you would bother though.

    http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg


    You would need two physical PCI-E x16 slots (i.e. the plastic slots that the graphics card is installed into). I'm not talking about the number of PCI-E lanes wired to the slot.
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