Note that this chip, when fitted with DDR3-1333, has a theoretical peak system bandwidth of 32 GB/s (achievable peak will be somewhat lower). This hash, running

Note that this chip, when fitted with DDR3-1333, has a theoretical peak system bandwidth of 32 GB/s (achievable peak will be somewhat lower). This hash, running on a single core, claims to process 16.2 GB/s. There are 4 cores (8 threads) on the X5550, so the hash is already limited by memory bandwidth.