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Hyper threading was an intel stop-gap reaction to the athalon64 x2, which was a REAL dual core, to buy them time while the pentium D was created and later laughed off the market. We finally got an "OK" dual core from intel when they decided to hack pentium 3 cores together and call it the Core duo, and with the core 2 duo they finally caught back up to AMD (by hacking amd64 instructions onto the P3 cores) and were able to start taking market share back. Nothing interesting happens between then and threadripper, but now we would be back to eating popcorn and watching the rest of the fight..... but the fight is over and everyone is over in the other arena watching arm and webkit winner-take-all style demolishing the incumbent platforms.

> Hyper threading was an intel stop-gap reaction to the athalon64 x2

No. Hyper threading was introduced in Feb 2002. The original single core athlon 64 was Sept 2003. The x2 was 2007.



Calling Core duo a Pentium III core, esp. when talking about microarchs, is a slight misrepresentation. Of course it was way closer and more of a derivative of the PPro descendants. But P6 did not vary a lot between PPro and P III, while before reaching Core Duo it went through Pentium M, and then enhanced. So yeah, it looks like more a Pentium III than a Pentium 4, but it was certainly not just a "hack [gluing] pentium 3 cores together"

Also Netburst was not that bad. It was a dead-end, yes, but on some markets it could compete with what AMD had.

Plus implementing SMT is not necessarily extremely easy compared to SMP, especially when you evolve designs.

And anyway, Intel shipped HT way before AMD shipped the Athlon 64 x2...

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