I ended up contacting the seller, but hurry up and test yours. Mine arrived DOA. As soon as sonnet INIT/Extension kicks in, my PowerMac 6500 locks up HARD. Test yours, I imagine I got a defective one, and seeing that mine was sealed, it is hard for them to test them. I don't know how they can say they are tested working when I still had the freaking OEM shrinkwrap on mine.

Test yours quick, just to make sure they work!