Roadrunner will be based on both Opteron X64 processors from Advanced Micro Devices and Cell PowerPC processing elements from IBM.
The Cell chip consists of a 64-bit PowerPC core that has had its out-of-order execution elements removed; it has 64 KB of L1 cache (split evenly between data and instruction caches), 512 MB of on-chip L2 cache, and an integrated Rambus XDR main memory controller. Each Cell also has eight co-processors, which IBM calls synergistic processor units, which are vector math units that are used to boost video and other media processing.Hat tip to FinzToRite for the link.
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