Originally Posted by oldsk00l
there are no dual core cpu's in it, just dual cpu's
They are powerpc based, simplistically, G5's. The architecture is miles away from being a PC. The only PC-like component is the video. Else, it's vastly different.
As I understand it, it's a Tri-Core PowerPC CPU. While you're right that the CPU itself is miles from being an x86, it's my understanding that there is only one of them in the XBOX2, and it's got 3 cores. To be fair though, that's just what every Rumour I've seen has said, rather than being the absolute final truth. Also, to be fair, the topology of the system (i.e. - VPU, CPU, Cache, Memory) is still similar to that of a PC - it's not like we're looking at the PS3 with it's 4 dynamically balancing Cells here.