I have a Asus P6X58D-E and one Sapphire 7970 I just got a few days ago.
My mobo has 3 pci-e slots.
The mobo is spec'd to run at 16x/16x/1x or 16x/8x/8x in Tri-Fire. My Dual-X 7970 is so wide though that using it in slot 1 I would not be able to use slot 2. I got my 7970 for a steal of a deal from a local ebayer who cut me a deal since it was local pick up.
Prices are shipped via USPS Priority with delivery confirmation and insurance (only the video cards)
I will take US dollars, Bitcoin and Litecoin.
FS: Sapphire AMD 7950 video card
Purchased in mid summer from someone else. Has been used for coin mining. Also used several days a week for BF4 gaming in Crossfire with the MSI card.
No issues with the card.