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*** AMD "Zen" thread (inc AM4/APU discussion) ***

It's just AMD proving they have the IPC performance to compete with Intel. Now all they need is a good clock speed and price.

For overclockers and gamers, for the rest of the market, which is 99.999% of all buyers, they don't overclock, the chips need to be X speed at a given TDP.

If Intel is selling 3Ghz core clock speed 8 cores at X price for servers and AMD is providing similar clocks in similar TDP at lower prices and with equal performance, it's going to compete very very well.

Intel sells their 6-8-10 cores at much lower clock speeds than their 2-4 core chips, similar will be true for AMD. It was suggested that a lot of the 2.8/3.2Ghz ES Zen chips were 65W tdp, meaning there is huge scope there for higher clock speeds within the 95W target they are going for.

Clock speeds when overclocked will probably dictate if I switch, I might well just because I'll get the best value for my 5820k sooner rather than later. Also in gaming terms, with so many of the higher performance/better graphics games being DX12 just between now and end of year, let alone next year, an 8 core lower clocked chip will make less and less difference for gaming but provide better and better performance for me in terms of running multiple apps at the same time and other computing work I do.

It would be nice if it hits say 4.5Ghz overclocked, but in reality at 4Ghz it would be as fast/faster than my 4.3Ghz hex core so... who cares.


The thing where AMD usually wins is, with Intel you have a lets say 4700k with HT and a 4600k without HT. With AMD you will get a 8 core unlocked chip for overclocking at lets say 4Ghz at £200 that can overclock to 5Ghz, and you also get a 3.4Ghz clock speed 8 core unclocked chip that can overclock to 5Ghz but is £160. AMD generally have that old school 2-3 speed bins of similar chips so people who don't clock have a choice of more clock speed for more money, AMD buyers could always buy the less premium lower clocked chip and just overclock further for WAY better value.

Intel providing a single overclockable version of each chip means you pay one price and like it or lump it. Where I'd buy a lets say 4650k that is a downclocked 4700k with a less premium price but still overclocks and probably to the same level, Intel just don't offer that chip any more, AMD mostly have done and hopefully will continue to do so.

For gamers/overclockers, it's that lower priced version that still overclocks that provides the killer value that persuades buyers to go AMD, hopefully they don't forget that.
 
At any rate, I've just seen AMD's video comparing against a Broadwell-E, and I'm hopeful, at least in terms of IPC, but clocks have to be right.

I doubt that AMD can match Intel's current generation for clocks - Intel are still
the people who have out more money and research into silicon than anyone else. But then for me it doesn't have to. For gaming, CPUs are not the bottleneck unless you're spending huge amounts on your GPUs. And for people like me who do programming or graphics work, we're very happy to take more cores in exchange for a slight hit on clock speeds.

I don't think Zen will be faster than Intel, but I think it may turn out to be a great buy.
 
I doubt that AMD can match Intel's current generation for clocks - Intel are still the people who have out more money and research into silicon than anyone else. But then for me it doesn't have to. For gaming, CPUs are not the bottleneck unless you're spending huge amounts on your GPUs. And for people like me who do programming or graphics work, we're very happy to take more cores in exchange for a slight hit on clock speeds.

I don't think Zen will be faster than Intel, but I think it may turn out to be a great buy.

Agree on this one, my sentiments exactly.
 
I doubt that AMD can match Intel's current generation for clocks - Intel are still
the people who have out more money and research into silicon than anyone else. But then for me it doesn't have to. For gaming, CPUs are not the bottleneck unless you're spending huge amounts on your GPUs. And for people like me who do programming or graphics work, we're very happy to take more cores in exchange for a slight hit on clock speeds.

I don't think Zen will be faster than Intel, but I think it may turn out to be a great buy.

Frankly I don't expect AMD to reach performance parity (Not that I think they have to)
What I do hope for is a product that'll actually be a viable choice, I've not felt that AMD offer a viable option since Thuban.
 
How much different is the IPC of the B-E compared to normal B like the 5775C?

Because the difference between normal B like the 5775C and Skylake is 4%.

So, assuming Broadwell IPC is same as Broadwell-E, the Zen IPC is less than 4% slower than Skylake.
That's not bad, considering it will come with double the cores........

As for Kaby Lake, we might not see it at all, while looks like is slower than Skylake.
 
Every time when AMD generate hype, the end product is disappointing.

So, let's hope that we see solid facts in the coming months.

I'm still reeling after the Fury X disappointment

I think the main difference is that for once the top tech reviewers that were there actually seem happy and hopeful for AMD.

Watch a lot of the old Fury X after demo streams, and videos and they didn't seem as chipper as they do now with Zen.

No hype train, but optimistic; I just hope Global Foundries and their 14nm process doesn't hamstring Zen with low clocks.

Sure it may have Broadwell matching IPC with engineering samples, but if it's boost clock is 1Ghz under their competitor it won't help much.
 
All this talk about a new AMD-processor is almost making me wonder if I should postpone myself from getting a 6700K-processor and wait and see how the new AMD stuff is doing both prestanda and price wise....
 
If I were to worried about one thing with Zen, it would be the hyperthreading / SMT. That is very hard to do and took Intel a few iterations to get right themselves. Even then it's not the magic that many people think it is. People see 'four cores / eight threads' and think it makes it like eight cores. No, it means your software sees eight threads but the actual performance bump is way less than a doubling. You still very occasionally find cases where hyperthreading reduces performance, though that's darn rare these days.

This will be a controversial view but I actually LIKED the approach in Bulldozer - real cores corresponding to logical cores and a shared floating point unit because floating point calculations are a small part of my (and most people's) workloads. I learned recently that Bulldozer was planned to launch with much higher clocks. Like 4.0 / 4.2. They spectacularly missed their clock targets. Imagine if it HAD launched at those speeds!

Anyway, that's a slight tangent. SMT is probably the biggest worry for me with Zen. A bit behind that would be the memory controller - another area they have been weak on before. I really, really hope that AMD doesn't mess up on these things.
 
Hmm, was going to upgrade from a troublesome Fx8350 system with a 170 gaming board, I7 6700 and 16gb DDR 4 in September.

This is making me wonder if it would be worth waiting a few months for Zen. Any idea when we can expect to see 'independant' reviews of the upcoming motherboards and chips?
 
Hmm, was going to upgrade from a troublesome Fx8350 system with a 170 gaming board, I7 6700 and 16gb DDR 4 in September.

This is making me wonder if it would be worth waiting a few months for Zen. Any idea when we can expect to see 'independant' reviews of the upcoming motherboards and chips?

General availability is supposed to be early 2017 though AMD have hinted they might have some availability at the end of the year if production goes well. I'd therefore expect reviews around the end of the year and certainly a lot more information by then. I personally am waiting. I upgrade infrequently and I think it's worth holding on for me to make the right decision. I dislike Intel as a company however so that's also a factor for me. (Something to do with paying OEMs not to buy AMD chips, perhaps!)
 
I have an 8520K, board & RAM that i'd happily sell for a bit of a loss to jump back on board. Given the quantum of loss it'd be a no-brainer for the extra PCIE lanes and I'm sure some intel fanboi on a budget would make it cost neutral for me.
 
Some motherboard analysis: http://www.anandtech.com/show/10581...-naples-32cores-dual-socket-platforms-q2-2017

First thing I noticed is the lack of an obvious chipset on the server board, so a lot of things must be part of the CPU die. There's also hints of it being eight-channel RAM, which will be some serious bandwidth for the server CPUs.

The desktop board is a bit harder to see since it's in a case but there's a fan on the lower part of the motherboard, could that perhaps be the Promontory chip?
 
My point about about prices is if it is on par with a 6900K then why would AMD practically give their highest end 8c/16t part away when they could charge £500+ for it? they could sell a 6c/12t based Zen at more mainstream prices and it would have virtually the same performance in 99% of tasks.

If people are expecting full fat Zen to cost £300 *if* it performs like a 6900K then I think you'll be in for a shock.
 
My point about about prices is if it is on par with a 6900K then why would AMD practically give their highest end 8c/16t part away when they could charge £500+ for it? they could sell a 6c/12t based Zen at more mainstream prices and it would have virtually the same performance in 99% of tasks.

If people are expecting full fat Zen to cost £300 *if* it performs like a 6900K then I think you'll be in for a shock.

Zen will be costly.
it offers same performance delta as Intel and why would a company sell their cpu for less than that then?
I am however glad to see AMD back in the top performance again.
Time to go Zen.........
 
Hmm, was going to upgrade from a troublesome Fx8350 system with a 170 gaming board, I7 6700 and 16gb DDR 4 in September.

This is making me wonder if it would be worth waiting a few months for Zen. Any idea when we can expect to see 'independant' reviews of the upcoming motherboards and chips?

Also Kaby Lake with Z270 motherboard are meant to be available before the end of the year.

So even if Zen turned out to be terrible, you should probably wait for Kaby Lake and Z270 anyway. Mostly because Z270 gives support for Intel Optane SSDs (the new kind of memory, also known as 3D Xpoint) and future support for the Cannonlake arch (i.e. i7 8700k etc.).
 
Really exciting. At least I expect to be upgrading my 5820k to a 6850k or 6900k for a much friendlier looking price. On the other hand, if it's really something special, my brother may be getting a nice x99 rig for cheap while I switch to Zen/AM4. :)
 
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