
"In this tutorial we will explain you how AMD64 architecture - which is used by Athlon 64, Athlon 64 X2, Athlon 64 FX, Opteron, Turion 64 and some Sempron models - works in an easy to follow language. You will learn exactly how this architecture - also known as K8 or hammer - works so you will be able to compare it more precisely to competitor architectures from Intel."
Check it out over here.