The NetBurst microarchitecture, [1] [2] called P68 inside Intel, was the successor to the P6 microarchitecture in the x86 family of central processing units (CPUs) made by Intel. The first CPU to use this architecture was the Willamette-core Pentium 4 , released on November 20, 2000 and the first of the Pentium 4 CPUs; all subsequent Pentium 4 ...