spat55 :
Just seen that it was a way for AMD to rival intel, my making it fit into intel's socket and being quicker
Back in the early 90s that used to be the case. AMD processors were clones of Intel's 80x86 processors, some were actually faster and highly regarded as a result.
The last processor family to be socket compatible with both AMD and Intel CPUs was Socket 7 which supported Intel Pentium, Pentium MMX, AMD K5 and K6, Cyrix 6x86, and a few others. Starting with the Pentium II and K7 they diverged and have been incompatible ever since.