The two 80Gb drives are NOT raid-ed. There are two because of the Matrox RT.X100 card. One of them is for the OS and the other is because the rtx100 'likes' a dedicated drive for realtime MPEG2 capture (I've still got a whole bunch of VHS home movies tapes of the kids growing up to transfer which I intend to leave 'un-edited'). It's basically why I went foir the RTX100 rather than the RTX10, because fo the realtime MPEG2 capture. The 160 Gb drive is the 'video drive'.
I've no idea what the implications of the CPU question would be, even if I understood the question

. I thought Intel made them all. what's with the Prescott bit? the spec says...
"3.0 GHz Pentium(r) 4 478 Hyper Threading (800FSB) Intel CPU"
I do play games sometimes, not too often. But basically, it is the 'standard spec card' from the vendor so I simply went with it. but i guess I'd rather have a card capable of more than I need in case I change the way i work or the work I do.
I found a vendor building the PC I wanted and went with it. I've no interest in building one from scratch (yeah, I know it would be a bit cheaper!). I'm a s/w guy and not h/w.