I don't understand what you mean. AMD is grabbing market share from Intel, with both hands, and Intel can't stop it. Intel is yesterday's news. Actually it has been a long time since Intel was a good investment. Over the last three years they've seen a 10% gain in value while the Nasdaq has seen 135% gain. You could probably use a dart board to pick stocks and do better than Intel.
Yes, Xilinx is a proxy for buying AMD stock with a significant kicker. A really good proxy. :)
I don't get where the "only" comes from!