For everything you got...WIKIPEDIA!!

XBOX360

Summary XBOX360->
Custom triple core (not the same core as dual cores in PC) processor from IBM 3.2GHz
500Mhz ATI graphics card, 90nm process, with a daughter die(?) attached
512 MB Memory clocked at 1.4 GHz. However this memory is shared by GPU & CPU

As you can see the architecture is very different from a computer...so i cant tell you what the equivalent of a PC, yet. Later i do a little more research then i'll post an equivalent. IN the meantime you can read the wiki =)