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Former Intel CPU engineer details how internal x86-64 efforts were suppressed prior to AMD64's success
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
I don't see this happening with both consoles using AMD, honestly I could see Nvidia going less hard on graphics and pushing more towards AI and other related stuff, and with the leaked prices for the 5000s they are going to price themselves out of the market