Well this is not good to hear. I've got four Sapphires running great. My two new Gigabyte 56s just arrived.... Will let you know if I have same issues....
For what it's worth, I have 5/6 Gigabytes working great and 0/1 Sapphires doing the same. Not sure mfr is
too important. Even for as many folks that have trouble with Powercolor, there are several people having a great experience. Don't sweat it too much just yet.