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I purchased mySAPPHIRE 100352-4L Radeon HD 7950 3GB GDDR5 PCI-Express Video Card with Boost last week and when I went to turn it on today my machine won't boot and monitor says no signal. If I take this card out my machine boots fine. I tried it on another windows machine with the same issue and on a Linux machine. On the Linux machine if I flip the bios switch on the card it boots but aticonfig does not list any cards and dmesg says in valid bios at 1. If I flip the switch back it fails to boot again.

Any suggestions? I had been messing around with setting in Trixx but I was working fine yesterday