I have a Dell Studio XPS 435mt and I just bought the Asus Geforce GTX 480. I ordered the Corsair TX 750W PSU.
The GTX 480 barely fits on the motherboard due to some cables coming out of the motherboard. But I think that shouldn't be a problem.
What I'm worried about is the airflow. Is this something that could work? Can I add a fan or two, or should I be changing the case completely? Has anyone tried this before with a 435mt?
If you have a reference model GTX480, the stock cooler vents heat outside the case so the heat impact on your system should be minimal. If you are not overheating now, the addition of the video card should not make a difference.