PSU problem and more.

[craked5]

Hello guys! I got 2 questions/problems to ask this board.
     
The first one is, i run a mobo (Asus p5k premium) with a 5830 and a 5870 both running fine, so i bought another 5870 to add via a pcie x1 riser. I bought a compatible PSU to power the 3 card independently but it doesnt seem to work, the card turns on but with its fan running on max and no image is shown. Any advice?
     
The other thing is i want to change to BAMT or w/e linux and i cant figure out where to find a program to change voltages, core and memorys in linux, help please

Thanks for reading/helping! 

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[marking]

The first one is, i run a mobo (Asus p5k premium) with a 5830 and a 5870 both running fine, so i bought another 5870 to add via a pcie x1 riser. I bought a compatible PSU to power the 3 card independently but it doesnt seem to work, the card turns on but with its fan running on max and no image is shown. Any advice?

What happens if you swap the third 5870 in place of one of the other cards, with the original PSU?

[GoldDigger]

You can't just plug the power supply in. To run multiple PSU's you'll need to do a bit more
See if this helps:
http://www.overclock.net/t/14455/multiple-power-supply-guide

[GernMgester]

What about a monitor or dummy plug until the driver is updated?

[craked5]

You can't just plug the power supply in. To run multiple PSU's you'll need to do a bit more
See if this helps:
http://www.overclock.net/t/14455/multiple-power-supply-guide

Thanks mate! that really helped!
And thanks everyone to, i got the answers for the probs.