So... what is it?
I think the earliest is the AMD Opteron (2003).
From a "earliest in each family" perspective, I think the
answer is:
AMD: AMD Opteron (2003).
Intel: Intel Xeon (Nocona) (2004)
VIA: VIA Nano (2008)
Excluding Itanium (thank god), are there any other early x86 64bit CPUs
that I'm missing or any that we explicitly no longer support?
~tom
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Fedora Project