What kind of motherboard does the Dell XPS 400 have?

hi siletto shimmy, dell uses a radeon which is the second best on the market but i like the best but the best is pulled between two asus and intel. you can use any case that you want just like processors but you have to adjust the power unit,ram and graphics to upgrade. so let me use some parts and figures it will help you see what i mean i have a therm take full case with a asus gigbyte motherboard a 400 power unit and 4gb of ram and a Nvidia geforce 9500gtx. i was thinking of upgrading my computer so i didn't mention i had a i3 processor so i wanted to get a evga intel x58 clified motherboard with a 980 cpu processor my power unit would have to be upgraded to about 850 gb and my processor to run then my graphics instead of the Nividia geforce 9500gtx i would need a radeon 5670 gtx so drum role please it would cost me $2100.00 what how did this happen? good luck hope i was helpful to you