Pentium D Athlon 64 X2 Multi-core processors symmetric multiprocessing 64-bit Intel AMD Athlon 64
In May 2005, Intel and AMD released their first dual-core 64-bit processors, the Pentium D and the Athlon 64 X2 respectively. Multi-core processors can be programmed and reasoned about using symmetric multiprocessing (SMP) techniques known since the 60s (see the SMP article for details).
