This link has all the details that I wanted to know about.
I’m surprised Sony did not include any eDRAM in their system. Also what’s up with 256MB for the system and video memory. The seven Synergitic Processing Cores in the PS3 are not full scale processors so its not a true 8 processor machine. While the X360 is a true triple-core dual thread gaming machine. Obviosuly if you can push the SPEs correctly, you will get great gaming capability but its not easy to do that.