[nthd]

I've been using a tempo 2-port sata pci card in my dual 1.8 g5 for a few years and just picked up another one. After installing it in 2 different pci slots I cannot get osx to see the ports. With hard drives plugged in and powered on osx does not see the drives either. Is there a problem installing 2 of the same sata cards in one machine?

[himself]

You may want to determine if the power requirements for the two cards are more than your machine can handle.

[Cadaver]

There shouldn't be any problem.

Are you sure the new card itself is functional? What happens if you have just the new card in the machine, without the old one? Can you try it in a different machine?

As long as you've got the open slots, it should work. No limit to the number of SATA controller cards. They don't draw that much power, so I suspect that's not the most likely issue.

[bowwowman]

nope, it's not a power issue with the card, as I had 2 of them in my old B&W at one time, which had a far smaller PSU than the OP's machine

probably just needs a pram/nvram zap to recognize the 2nd card. And IIRC, ALL hdd's connected to Sonnet's cards have to be reformatted once connected to be seen by the card........