>IBM - AMD Co-operation.
IBM held important role in early AMD X86 development, because of internal "Supplier Rule" in IBM Corp.
IBM want to get CPU from another vendors beside INTEL to prevent components / spare part problem if something happens to INTEL's Fabs.
IIRC in the middle of 1980s, low end IBM 8088 PC-XT / PC use AMD CPU, not INTEL. IBM use INTEL 80286 on PC-AT.
IBM also have important role in the early development of Cyrix, Transmeta and several other CPUs.
Perhaps in the future, IBM will create multicore CPU combo that contain 2 cores: AMD X86 and PowerPC?