Dell XPS8700 With GeForce 980 Does Not Work

I just bought the GeForce 980 and installed into my Dell XPS8700. Get black screen on boot. Updated to BIOS A08. Get nothing. Never had any other problem with any other graphics card in any other computer. I need this graphics card not for recreational fun, but for high end renderings & 3D modeling. It was my recommendation to my boss to purchase this computer. Deadline is drawing very near. If this issue isn't resolved IMMEDIATELY I will need to find myself another computer manufacturer that this card is compatible with (...every other one out there) or I may need to find another job. Is there any kind of ETA for an updated BIOS to get this thing resolved???