Don't forget about "Turbo Boost" - that "1.8 GHz" runs at 2.8 GHz when you're only using one of two cores. Combined with a more efficient architecture, this he

Don't forget about "Turbo Boost" - that "1.8 GHz" runs at 2.8 GHz when you're only using one of two cores. Combined with a more efficient architecture, this helps explain the performance gains.