Sandy Bridge, Part 4: Core i5-2400, i5-2500K and i7-2600K CPUs

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System Power

Our first test is low load system power consumption, at idle and during video playback. While some users work their systems hard, many PCs are often left idling or used for mundane tasks like watching video or surfing the web for hours on end.

In his area, Sandy Bridge shows a slight improvement over Lynnfield/Clarkdale chips, using about 4W less than most of the LGA1156 lineup idling, and about the same power when playing video.

Power consumption on a theoretical full load was also impressive, about equivalent to that of the Core i5-750 and only cleanly beaten by the i5-661 and i5-680, a pair of dual core processors.


For our thermal test, each CPU was paired with the Scythe Kabuto with its stock fan spinning at ~800 rpm. AMD temperatures were taken using the motherboard's sensor via SpeedFan and Intel temperatures were taking with RealTemp.

*Direct temperature comparisons between Intel and AMD processors should not be made.

Given their superb energy efficiency we are hardly surprised to find that the 2400/2500K/2600K all run much cooler than the LGA1156 and LGA1366 Core i7's.

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