I really don't think so. What are you trying to get that the 730 has that you can't get for your 720?

Ability to use a new Quad processor vs. X6800 or QX6850

You should be able to swap the nForce 680i to a nForce 790 i Ultra, which should do the trick. I don´t see why that wouldn´t work.

Good thing Davet50 here stopped you from listening to me. :-)

 

I currently have a Q6600 in my 720, and there is a pretty easy way to safely crank it up to 3 ghz.

 

If it´s a bit more processor power you need, and in case you do have the Q6600, PM me and I´ll get you some more info.

 

//Fredrik

No you can only put in a 720 board the 720 uses BTX design. There are no other motherboards that will fit the system without extensive modification.

As to your processores they will work with the current board. The came standard on the systems when shipped from DEll.

The QX6850 might be a better deal If  you want to be able to overclock it, as you have some very limited options with the extreme processors in the bios.

 

That´s the one, and it´s been running stable for 3 months now.:smileyhappy:

Have a look at this thread:

 

http://www.dellcommunity.com/supportforums/board/message?board.id=Tech_Talk_XPS&message.id=53397&query.id=210472#M53397

 

Basicly you would get QX6850 performance at Q6600 price....