Re: Is this possible???
Hi weirdguy99 and welcome to the dell fourms.
to answer your questions:
Yes the 8800gt will fit into the system. Since you are upgrading the power supply it will have the necessary power connectors.
As per your system specs 800mhz ram will work in the system
The Q6600 will not work the system does not support quads.(thank to info provided by Shesagordie)
The PC power and cooling supply is an excellent supply. I put silencer into a old Dimension 8300 and it is still performing flawlessly. These are highly rated supplies so rest easy there and installation was very simple.