Lol so now an i3 sells for $350? Which is what I suggested the 8c/16t chip should sell for. No wonder you're having so much trouble with this. Points 1-9, irrelevant when it comes to stealing back market share if the pricing isnt right. All that matters is that AMD needs to have a chip that can outperform Intel in every price bracket. 15% slower (if we are being generous) for a similar price gives me what reason to buy exactly? Come on now man...
Dude,the 4C/8T is going to be the same huge chip as the 8C/16T(unless they do an MCM) - how the heck are they going to make margins on such a chip??
What happens to the 4C/4T chips with faulty SMT?? Pentium level pricing??
Unless AMD,is making two dies,I suspect its going to be one large chip if they have 8C/16T versions and will be on a "cutting edge" node for an independent fab - I doubt it's going to be cheaper than something like 28NM.
I expect an 8C/16T Zen chip to similar in size(or maybe larger) than a 14NM Broadwell E chip.
Even selling a 4C/8T salvaged chip at Core i5 prices,will still mean Intel gets away with making more per sale.
The main issue is AMD has been selling massive chips for years,and even when they are competitive its been at the cost of a bigger chip.
The problem is you are so worried about about one metric,ie,single threaded performance, that you don't seem to get a 4C/8T Zen is not going to be 15% slower overall,unless all you do is run a Cinebench R11.5 single thread benchmarks all day.
If that was the case,using your logic a Core i7 3770 or Core i7 4770 would be slower in every metric and every game than a Core i3 6300. Older Intel 4C/8T against newer Intel 2C/4T.
The problem is unless you really want to cherry pick situations,its not going to.
Also,Zen will be the third chip AMD has produced since Piledriver- that's three generations of cumulative IPC improvements. Even in single threaded scores,an FX8350 is nowhere near SB,and probably not even K10 level.
The FX8350 is an ancient chip which should have been replaced years ago,and AMD is only stringing it along probably due to prior commitments.
What company would be selling a quad core with HT for the same price as a Core i3 dual core and 15%(or even 20%) slower in some benchmarks and the Core i3 being utterly wiped out in others?
I have had Core i3,Core i5,Core i7 and Xeon E3 chips myself. Done builds for others. The Core i3 chips are OK up to a degree but I would always have a lower clocked Core i5 over them,let alone a Core i7.
The Core i5 6400 is slower than a Core i3 6300 in most single threaded benchmarks. Again a similar scenario to what you propose with Zen.
Most of the lower end Core i5 chips have had lower single threaded performance than a Core i3 and are at a performance level more expensive chips had before.
In the end all those Core i5 chips were more expensive more than a Core i3,so should Intel have just priced them at a Core i3 price??
The same does apply to AMD.
Even with the Athlon,Athlon XP and Athlon 64,AMD didn't price their chips too cheaply either.
When the Phenom II X6 was released,it closely tracked Core i5 prices for most of its lifespan. The Core i3 chips were bracketed by smallish die Athlon II X4 and more costly Phenom II X4 chips. The margins were not as good as Intel then,but they were better than now IIRC.
However,the IPC difference was nowhere as big as it was now,and even the power consumption to,up to a degree too. There were chips like the 95W Phenom II X6 1055T which were no worse in power consumption to the Core i5 equivalents IIRC!!
Compare that to now - the FX8350 has vastly worse single thread IPC,an ancient platform with mostly ATX boards(only one mATX board available after a few years),high power consumption and lacks support for some of the more modern extensions,and it was released
over three years ago!
Most of us,realistically expect a return to the days of the Phenom II X6 with Zen and the same kind of pricing. If they can't sell a 4C/8T Zen for a similar price to a 4C Intel chip with no HT,they might as well not bother!!
Like I said we need to agree to disagree,as we could argue for quite a while in this way.