▁and ▁physical ▁simulation ▁( e . g ., ▁scientific ▁and ▁struct ural ▁engineering ▁model ing ). ▁ ▁In ▁a ▁simple ▁analysis , ▁the ▁Cell ▁processor ▁can ▁be ▁split ▁into ▁four ▁components : ▁external ▁input ▁and ▁output ▁structures , ▁the ▁main ▁processor ▁called ▁the ▁Power ▁Process ing ▁Element ▁( P PE ) ▁( a ▁two - way ▁simultane ous - mult ith read ed ▁Power PC ▁ 2 . 0 2 ▁core ), ▁eight ▁fully ▁functional ▁co - process ors ▁called ▁the ▁Syn erg istic ▁Process ing ▁Element s , ▁or ▁S PE s , ▁and ▁a ▁special ized ▁high - band width ▁circular ▁data ▁bus ▁connecting ▁the ▁P PE , ▁input / output ▁elements ▁and ▁the ▁S PE s , ▁called ▁the ▁Element ▁Inter connect ▁Bus ▁or ▁E IB . ▁ ▁To ▁achieve ▁the ▁high ▁performance ▁needed ▁for ▁mathemat ically ▁int ensive ▁tasks , ▁such ▁as ▁dec oding / encoding ▁M PE G ▁streams , ▁generating ▁or ▁transform ing ▁three - dimensional ▁data , ▁or ▁undert aking ▁Fourier ▁analysis ▁of ▁data , ▁the ▁Cell ▁processor ▁mar ries ▁the ▁S PE s ▁and ▁the ▁P PE ▁via ▁E IB ▁to ▁give ▁access , ▁via ▁fully ▁cache ▁coh er ent ▁D MA ▁( direct ▁memory ▁access ), ▁to ▁both ▁main ▁memory ▁and ▁to ▁other ▁external ▁data ▁storage . ▁To ▁make ▁the ▁best ▁of ▁E IB , ▁and ▁to ▁overlap ▁computation ▁and ▁data ▁transfer , ▁each ▁of ▁the ▁nine ▁processing ▁elements ▁( P PE ▁and ▁S PE s ) ▁is ▁equ ipped ▁with ▁a ▁D MA