▁ 1 0 2 . 4   G F LO PS ▁total ▁for ▁eight ▁S PE s , ▁which , ▁coinc ident ally , ▁is ▁the ▁same ▁peak ▁performance ▁as ▁the ▁N EC ▁S X - 9 ▁vector ▁processor ▁released ▁around ▁the ▁same ▁time . ▁The ▁IBM ▁Road runner ▁super comput er , ▁the ▁world ' s ▁fast est ▁during ▁ 2 0 0 8 – 2 0 0 9 , ▁consisted ▁of ▁ 1 2 , 2 4 0 ▁Power X Cell ▁ 8 i ▁process ors , ▁along ▁with ▁ 6 , 5 6 2 ▁A MD ▁Op ter on ▁process ors . ▁The ▁Power X Cell ▁ 8 i ▁power ed ▁super ▁computers ▁also ▁domin ated ▁all ▁of ▁the ▁top ▁ 6 ▁" green est " ▁systems ▁in ▁the ▁Green 5 0 0 ▁list , ▁with ▁highest ▁M F LO PS / W att ▁ratio ▁super comput ers ▁in ▁the ▁world . ▁Bes ide ▁the ▁Q S 2 2 ▁and ▁super comput ers , ▁the ▁Power X Cell ▁processor ▁is ▁also ▁available ▁as ▁an ▁acceler ator ▁on ▁a ▁P CI ▁Express ▁card ▁and ▁is ▁used ▁as ▁the ▁core ▁processor ▁in ▁the ▁Q P ACE ▁project . ▁ ▁Since ▁the ▁Power X Cell ▁ 8 i ▁removed ▁the ▁RAM B US ▁memory ▁interface ▁and ▁added ▁significantly ▁larger ▁DDR 2 ▁interfaces , ▁and ▁en hanced ▁S PE s ▁the ▁chip ▁layout ▁had ▁to ▁be ▁re work ed ▁which ▁resulted ▁in ▁both ▁larger ▁chip ▁die ▁and ▁pack aging . ▁ ▁Architecture ▁While ▁the