Its not Hyperthreading. AMD is using their Cluster Core design which is 2 sets of execution units fused between 2 128bit FP schedulers (AVX). Each set of execution units gets its own thread. Hence one Cluster Core and 2 threads. Bulldozers full design calls for 8 Cluster Cores and 16 threads And shared L3 between all cores.
Intel seems to be keeping with their same tried and true system but on a new architecture.







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