Six-Core Analysis: AMD’s Phenom II X6 Gets Scaled Down

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What’s the real benefit of six cores versus five, four, three, two, or one? This article looks at the performance, power, and efficiency of AMD's Thuban-based six-core Phenom II X6 1090T processor running with several different core configurations.

Benchmark Results: Efficiency

Interestingly, average power consumption was lower on five cores than on four during our workload.

Total power used scales well. It's obvious that the many-core configurations require less total power to complete our workload.

As a result, the higher active core counts deliver better performance per watt.