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I appears along with many other posters, I've been making a mistake assuming the Athlon FX==opteron 1xx.
Look at <A HREF="http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_9485_9488^9537,00.html#74670" target="_new"> this FAQ on AMD's site</A>:
So there you have it. The FX has only 1 HT link, the Opteron has 3 (non of them coherent though). The implications are minimal though. AFAICS, this would mean an Opteron 1xx should work in any FX board, but not necessarely vice verca. A single cpu opteron board that uses more than 1 HT link (like one for AGP, and another for PCI-X) would not work with an FX chip, but then, I've not seen any such board so far.
= The views stated herein are my personal views, and not necessarily the views of my wife. =
Look at <A HREF="http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_9485_9488^9537,00.html#74670" target="_new"> this FAQ on AMD's site</A>:
What is the difference between the AMD Athlon 64 FX processor and the AMD Opteron™ processor for 1-way servers and workstations?
A:
While they both feature a 128-bit wide integrated memory controller with registered memory, the AMD Athlon 64 FX processor is designed for gamers and prosumers who need high-performance desktop systems. The AMD Opteron processor for 1-way servers and workstations is designed for businesses that need high-performance server solutions for demanding enterprise applications.
Additionally, the processors differ in that the AMD Opteron processor features three HyperTransport links, compared to the one HyperTransport link of the AMD Athlon FX processor. They are also tested to different electrical specifications.
So there you have it. The FX has only 1 HT link, the Opteron has 3 (non of them coherent though). The implications are minimal though. AFAICS, this would mean an Opteron 1xx should work in any FX board, but not necessarely vice verca. A single cpu opteron board that uses more than 1 HT link (like one for AGP, and another for PCI-X) would not work with an FX chip, but then, I've not seen any such board so far.
= The views stated herein are my personal views, and not necessarily the views of my wife. =