im going to join in with this if thats ok,
i have 2 radion x1950 crossfires and windows seven but i cannot see the second card.
genuine windows 7 ultimate o/s
both cards work on their own in the orange slot at the top
when i put the 2 cards in only one is seen.
i cannot see any options in the bios to enable the slot (asus p5w)
i have installed both cards separately and placed both back in the box and rebooted.
i have a 750 watt ocz supply that should be man enough to do the job
the second card is powered as the fan is spinning
i have also uninstalled all the drivers and tried reinstalling with both cards in the machine but still no joy.
In places im reading it cant be done on win7 as the cards allthough bloody excellent cards are now legacy cards sigh,
so if anyone has any pointers or another train of thought please let me know is im goin in circles now