The yardstick used for Intel's new power-frugal chips is being questioned in article posted by Ars Technica.
The article, titled "Power saving through marketing: Intel's '7 watt' Ivy Bridge CPUs," asserts that Intel may have been over-aggressive with its power-efficiency claims.
More specifically, theare actually specified by Intel on its site as 13 watts, the article says.
"The 7-watt number advertised during Intel's keynote yesterday is actually from a new metric, 'scenario design power' (SDP), which purports to measure how much power the CPU is using during average use," Ars Technica said.
Intel's longstanding yardstick for measuring a chip's power envelope is TDP, or thermal design power.
So, based on the historical TDP measurement, the new i5-3339Y Processor -- one of the new extra power-efficient chips -- is 13 watts, as Intel's own site specifies.
Intel did not respond to a request for comment.