This guy is an idiot
The 1,2Ghz mac from Xtreme is just vapourware.It\'s almost impossible to overclock the G4 to these speeds (mpc7400 version) because the transistors can\'t handle it,they would melt.(There is more of a chance they could OC the newer mpc7450 because they have a 7 stage pipeline)but there is a serius shortige of them.
He wouldn\'t double the power by having 2 GF.3\'s they aren\'t designed that way.The only manufacturer to have support for more than one cores was 3DFX with their SLI technoligy they sold that technoligy before they went under.There isn\'t a dual AGP motherboard in existance,AGP isn\'t designed that way.3 PCI slots is too little 5 is the minimum for me.
He wouldn\'t use all that ram,more ram on a mac is better if he\'s using MacOS 9,x or below since it has poor PMT(preemtive multitasking) and no protective memory.It\'l all be fixed in MacOS X when 128 will be enough.
A terabyte hard drive is VERY hard to get and VERY expensive.The only ones I\'ve heard of were made by Maxtor.
And a DVD-R drive costs about 3000$.He would be better of getting a REAL prebuilt Mac with the drive built in and thus getting the drive very cheap.