Original: Modern commercial implementations The Intel Pentium 4 was the first modern desktop processor to implement simultaneous multithreading, starting from the 3.06GHz model released in 2002, and since introduced into a number of their processors.
Simplified: Examples of modern SMT CPUs The Intel Pentium 4 was the first modern desktop processor to implement simultaneous multithreading, starting from the 3.06GHz model released in 2002, and since introduced into a number of their processors.