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running a single PC with a quad core CPU. It may be easier to understand this by comparing running 2 separate PCs with dual core CPUs in them vs. See the graysky's articles on TechARP for actual charts and tables:įor a load that will use all processors, I believe that testing will show better performance per watt for a quad core compared to a dual (or even single) core because there is little or no additional overhead from the motherboard or powersupply or hard drives when adding an additional core. In particular, look at x264 encoding, where a quad-core processor offers nearly double performance.
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The 'SYSmark Performance per Watt' can be misleading when comparing the dual and quad core processors, particularly when looking at other types of loads that make better use of the additional cores. But how does the Core 2 Duo compare to the Core 2 Quad? And how much better is it when compared to the Pentium 4 and the Pentium D? Let's have a look! Both are fast and efficient dual core processors, but Intel's Core 2 Duo won the efficiency battle due to its performance advantage, allowing it to resume an idle state quicker than the AMD processor. Our first article dealt with an AMD Athlon 64 X2 5000+ (65 nm) and Intel's Core 2 Duo E6400 Compare Prices on Core 2 Duo E6400. Power consumption has to be related to performance at all times, because a faster system may return to a more energy-efficient state earlier than a slow machine, and thus consume less power over time, even though the faster solution might have a higher maximum power requirement.
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While most publications release test results of minimum and maximum power requirements of components and systems, these results only tell a small part of the story. This benchmark is based on real-life applications, which process real-life workflows in a multitasking environment. When we looked at the typical power consumption of two AMD and Intel systems, we tracked the total power required to perform real-life tasks over time, simulated by BAPCo's SYSmark 2007.