I have just bought a radeon 7870 hawk for my 8500 XPS. This is now my second doa card that I have received (The original DOA that I got 6970) Do you think that dell has a kernel built into the bios where they block the support for non oem cards. I am sure that the PSU is working properly and connected, but this seems too odd that I have received two cards that a DOA. What do you guys think?