Crossfire x16 x4

Dracio

Distinguished
Jan 15, 2010
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I have this motherboard:
http://www.gigabyte.com/products/product-page.aspx?pid=3242#sp
running an i5 750 2667mhz OC @ 3.6ghz, 4gb 1600mhz RAM.

Expansion Slots
*1 x PCI Express x16 slot, running at x16 (PCIEX16) (The PCIEX16 slot conforms to PCI Express 2.0 standard.)
*1 x PCI Express x16 slot, running at x4 (PCIEX4)
2 x PCI Express x1 slots
3 x PCI slots
Multi-Graphics Technology
Support for ATI CrossFireX™ technology

I have a Radeon HD 7870 tahiti LE on its way now and am wondering if a 2nd would be worth it? I'm not sure whether it would scale both PCIE slots back to x4 and make it not worth it?

Thanks for any help you can give!