[3] The Pentium Pro was the first x86 microprocessor designed by Intel to use this technique, though the NexGen Nx586, introduced in 1994, did so earlier.

Intel went back to the drawing board for a design that would be optimally suited for this market segment.

The result was a modernized P6 design called the Pentium M. Design Overview[6] The Pentium M was the most power efficient x86 processor for notebooks for several years, consuming a maximum of 27 watts at maximum load and 4-5 watts while idle.

[7] Windows 8 and later also refuses to boot on these processors for the same reason, as they specifically require PAE support to run properly.

Improvements relative to the Intel Core processors were: While all these chips are technically derivatives of the Pentium Pro, the architecture has gone through several radical changes since its inception.