Intel Core i5, Core i7 800 Processors and P55 Express

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Power Consumption

We'd like to cover a few final data points before bringing this article to a close. Throughout all of our benchmarking and testing, we monitored how much power our test systems consumed using a power meter. Our goal was to give you all an idea as to how much power each configuration used while idling and while under a heavy workload. Please keep in mind that we were testing total system power consumption at the outlet here, not just the power being drawn by the processors alone.

Total System Power Consumption
Tested at the Outlet


Intel claimed vastly superior idle power consumption characteristics with Lynnfield, which we were able to prove out in our testing. Both the Core i5 750 and Core i7 870 offered significantly lower power consumption while idling than all of the other platforms we tested. Under load, power consumption was somewhat higher than the Core 2 / X48 combo, but keep in mind, these new chips typically offer superior performance than the Core 2, which bodes well in terms of their overall power efficiency.


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