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AMD Defends MCM Approach for Building 32-core EPYC: Huge Cost Savings of ~41%

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AMD, presenting at a HotChips talk, packed with VLSI gurus, defended its decision to make AMD EPYC enterprise processors in the socket SP3r2 package a multi-chip module (MCM) of four 8-core "Summit Ridge" dies, rather than building a monolithic 32-core die. For starters, it stressed on the benefits of a single kind of silicon, which it can use across its performance-desktop, high-end desktop, and enterprise product-stacks; which translates into higher yields. "Summit Ridge" is the only CPU silicon based on the "Zen" micro-architecture, with the company giving finishing touches to the second silicon, codenamed "Raven Ridge," which will power mobile and desktop APUs. AMD has to pick the best-performing dies out of a common bin. The top 5% dies go into powering the company's Ryzen Threadripper HEDT processors, and a higher percentile go into making EPYC.

The relatively smaller 8-core common die has an inherently higher yield than a larger chip due to the rule of inverse-exponential reduction in yield with increasing die-size. This, coupled with the R&D costs that would have gone into developing the hypothetical monolithic 32-core "Zen" based silicon, works out to a significant cost saving for the company. A 4-die/32-core MCM is 0.59X the cost of a hypothetical monolithic 32-core die, according to the company, which is a cost-saving that enables the company to aggressively price its products. The slide AMD used in its presentation also confirms that each 8-core "Summit Ridge" die features four external Infinity Fabric links, besides the one that connects the two CCX units with each other. On a 4-die EPYC MCM, three out of four of those external IF links wire out to the neighboring dies, and one link per die probably wires out to a neighboring socket on 2P machines.



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'Defends' seems a strange choice of words. Its just smart, and nobody except Intel's marketing team is 'attacking' AMD for 'glue'.
 

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'Defends' seems a strange choice of words. Its just smart, and nobody except Intel's marketing team is 'attacking' AMD for 'glue'.

You forget about investors that are drinking the Intel coolaid and believing in whatever they're being told. As such, AMD sadly has to defend itself and explain why they chose to do things a certain way.

The approach does have some downsides, but it seems to be a fair trade off if the cost savings are that high.
 
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Hi dudes. I noticed in the title you said the cost savings are 59%.
AMD states that the price is 0.59x of what the monolithic die would be.
So the cost savings are actually 41%

Thank you for your articles and everything. Have a nice Day everyone.
 
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A costs 100%
B costs 59%

What's the cost saving, TPU?

TPU: 59%, dúh! :roll:

Good job TPU! Good job!

No offense, but the quality in your news articles took a big nose dive in the last few months.
 
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AMD can just reply with this pic.
ok intel.jpg
 

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Hi dudes. I noticed in the title you said the cost savings are 59%.
AMD states that the price is 0.59x of what the monolithic die would be.
So the cost savings are actually 41%

Thank you for your articles and everything. Have a nice Day everyone.

Thanks for noticing that direct conversion mistake and putting it out there in a respectful, polite manner =)

If only everyone was like that...

Edit: And also, welcome to TPU! We guess you didn't just start an account to correct our math, and hope you become a member of our awesome community =) Hit our forums for all the guides and stickies you might need.
 
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You forget about investors that are drinking the Intel coolaid and believing in whatever they're being told. As such, AMD sadly has to defend itself and explain why they chose to do things a certain way.

The approach does have some downsides, but it seems to be a fair trade off if the cost savings are that high.

It seems investors are bunch of idiots. Maybe they should stick to shit they even understand. I mean, AMD "defending" itself is literally handing over all the plans and ideas straight into competition hands. And their competition has more money and more R&D. Whatever day talk publicly will in the end only be used against them. Intel was caught with its pants down for Ryzen, I don't think it'll repeat again and they'll follow AMD's press releases and leaks. I mean, just look at the multi-GPU idea that didn't even come from AMD, it came from users. And NVIDIA immediately published a paper talking about it. With R&D NVIDIA has, they could probably already have a working prototype of a stitched GTX 1050Ti cores as a proof of concept. Or even something made of larger cores. AMD needs to stop handing out stuff and just work on what they think it'll give them the edge. Then make a huge PR campaign a month or two prior release to get people excited. And then no joke hard launch so you hit competitors hard.
 
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I see that more as an explain of why they chose that technique. And I say kudos to them for outsmating Intel being MUCH inferior in resourses. They managed to shake the market and force Intel to bring 6-core i7s and 4-cores i3s, while before Ryzen launch and for 5 years they milked the customers without shame at all. Capitalism is known for this practice but limits are needed or customers are paying double for less. And Ryzen reset the value of cpus to more sensible levels.
 

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'Defends' seems a strange choice of words. Its just smart, and nobody except Intel's marketing team is 'attacking' AMD for 'glue'.

Agree: It seems as if in this day in time you have to defend being smart instead of the oppersite. People think the most "powerful" solution is choosen everytime? Making a product is about compromises and if they can reduce cost of production by 41% to a not 41% performance loss, well they will win huge (and the customers have by getting 8-32 cores with decent performance at half of whats was possible before. AMD made the right choice and Intel is right now trying to do the same with their production. Regarding the 'glue thing' I have actually seen fanboiis on TPU adopt that term as a rule of thump... The last idiot is yet to be born! :D
 
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You forget about investors that are drinking the Intel coolaid and believing in whatever they're being told. As such, AMD sadly has to defend itself and explain why they chose to do things a certain way.

The approach does have some downsides, but it seems to be a fair trade off if the cost savings are that high.

The Intel coolaid dictates that Intel is going to implement half of AMDs IF solution in Coffee Lake or they cant feasibly add cores... Irony knows no bounds here right :D

It seems investors are bunch of idiots. Maybe they should stick to shit they even understand. I mean, AMD "defending" itself is literally handing over all the plans and ideas straight into competition hands. And their competition has more money and more R&D. Whatever day talk publicly will in the end only be used against them. Intel was caught with its pants down for Ryzen, I don't think it'll repeat again and they'll follow AMD's press releases and leaks. I mean, just look at the multi-GPU idea that didn't even come from AMD, it came from users. And NVIDIA immediately published a paper talking about it. With R&D NVIDIA has, they could probably already have a working prototype of a stitched GTX 1050Ti cores as a proof of concept. Or even something made of larger cores. AMD needs to stop handing out stuff and just work on what they think it'll give them the edge. Then make a huge PR campaign a month or two prior release to get people excited. And then no joke hard launch so you hit competitors hard.

Do you REALLY think that's the way this goes?

Coffee Lake and 6-core mainstream was already announced some time ago. The only kneejerk from Intel was them pulling it in 3Q of a year, but they were definitely already planning and designing a similar move to higher core counts. I find it funny that people always consider the market leader less intelligent than themselves. Besides, Intel has known ever since Sandy Bridge that the Ghz wall was 4 Ghz and going over was going to be painful for perf/watt, proof being 6 generations of Intel Core products after that, and since Kaby Lake they're passing the 4Ghz barrier base/boost clock and look at those glorious TDPs, even on Intel's superior process. Its not a coincidence Coffee Lake is the gen that releases higher core counts. If Intel was really panicking they'd not have postponed so much over the years, from full node shrinks to whole generations of refreshes as with Kaby Lake. Everyone has known Ryzen was in the pipeline for several years now and AMD already pushed higher core counts during Sandy Bridge.

Multi GPU idea came from a lack of processing power, its as simple as that. Not 'users'. Just demand, like in every marketplace. Right now we have single cards that can push enough pixels to saturate the cable the data's sent through, hell we can even add endless layers of post processing on top and STILL render 'in-time'. GPU processing power on a single die has leaped ahead of I/O standards. It makes a lot of sense that we're now moving away from multi GPU again. We've seen its drawbacks and all sorts of new tech really can't deal with those drawbacks (latency, frametime variance, high degrees of support from drivers). At the same time, just like @ Intel Core and AMD Ryzen, modular design now steps in because we now have access to fast interconnects and are rapidly exhausting the available 'tricks' to further increase perf/watt and perf/mm of silicon. On top of that, node shrinks increase the yield risk of larger dies even more; so really, modular is inevitable and you don't need to be rocket scientist to understand this.

AMD isn't handing out stuff, its just following the obvious line of thought, one that all leading hardware companies follow, one that's already widely adopted in other markets too, such as ARM. Its a well known fact that in all ages of our history, a lot of people at similar timeframes think of similar things. And they really have never spoken to each other. It just made sense at that time. What matters is the first fellow who can market that idea as a usable, effective product.
 
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We've had 6 cores, 12 threads since Nehalem, getting it now is like whatever... I'm not even talking about that. I'm talking about Vega and Ryzen and how much info we got over time. Totally unnecessary and just makes competition more prepared.
 
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It seems investors are bunch of idiots. Maybe they should stick to shit they even understand.
Yes, yes. Everyone are idiots. Investors don't know how computers work, they don't understand AMD's genius.

It's just PC enthusiasts that know how awesome this technology is and why everyone should support it.

The truth is: investors understand Zen pretty well. So well, in fact, that they've priced AMD very well at the day of release already.
As you can see below - there were no large shifts in stock price after Ryzen reviews (beside the temporary drop after Intel licensing fiasco).
And since this is MCM and AMD told us how much they save on manufacturing, it's not that difficult to estimate how different CPUs will perform and how much they will cost.
It's quite unlikely that they'll attract investors by repeating what we already know. There's only one way: improving single-thread performance and fixing platform quirks that AMD fans here underestimate so much (and maybe also selling RTG altogether :-D).

And yes, homegrown investing gurus on this forum were expecting $30 by now. :)

upload_2017-8-24_15-35-20.png
 
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We've had 6 cores, 12 threads since Nehalem, getting it now is like whatever... I'm not even talking about that. I'm talking about Vega and Ryzen and how much info we got over time. Totally unnecessary and just makes competition more prepared.

That's the thing, you keep thinking the 'competition' is trolling forums and reading WCCFTech, you really need a reality check man.
 
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Wow, stock price increase as a proof. They can say they have a CPU that has 50 Jigahertz and does Cinebench in 25 milliseconds. And the stock price will just go through the roof whether they actually have it or not. Or someone farts in their HQ and the stock value will fall because it contributes to the green house gas emmisions and that's bad and the stock thus needs to fall. Yeah, that stock value...

@Vayra86
No, that's apparently what you think they are doing...
 
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Yeah...but at the end of the day, it still boils down to, Intel is charging 50% or more for CPUs that are only at best maybe 10% faster.....
 
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Wow, stock price increase as a proof. They can say they have a CPU that has 50 Jigahertz and does Cinebench in 25 milliseconds. And the stock price will just go through the roof whether they actually have it or not. Or someone farts in their HQ and the stock value will fall because it contributes to the green house gas emmisions and that's bad and the stock thus needs to fall. Yeah, that stock value...

Whether you like it or not, stock price is what measures the faith investors are putting in a company.

On one hand you don't believe in stocks and you don't care whether someone wants to give AMD money or not.
On the other hand you're constantly moaning that all these problems are a result of their small R&D budget.

You know, I think there is a name for your affliction. And I don't need a large R&D budget to notice it...
 
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You don't have a surprise for competition if you parrot EVERYTHING to the whole world. It has NOTHING to do with R&D budget. I'm just surprised Ryzen distrupted the market as much considering how they parroted everything straight to Intel. They didn't even need to use leaks and corporate espionage, everything was served directly to them. I guess after having no competition for so long even Intel didn't believe it was real or something...
 
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I love AMD for this solution.

Its cheaper for them, thus cheaper for us and performance is plenty close enough.
I also hope that Intel will keep doing what it is doing so we have a nice devided landscape in terms of tech.

However Intel being Intel I would not be surprised if they suddenly do this for some of their processors as well because ya know, Intel is rather cheap that way.
 
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Yeah...but at the end of the day, it still boils down to, Intel is charging 50% or more for CPUs that are only at best maybe 10% faster.....

who have ever said intel is faster at server?
They're not at 2x the cost, they lost in almost every benchmark metric capable.

anandtech did a good review on epyc vs xeon (latest vs latest) and the database benchmark is bogus but the rest is good.
Database dataset was chosen at a size where it cannot fit in a L3 cache of Epyc, before you say that shows a weakness.

I've never seen any production databases at those sizes, only lab databases thus it's bogus.
Who runs a 8000\4000 usd cpu and have a 10-20mb database?...
 
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You don't have a surprise for competition if you parrot EVERYTHING to the whole world. It has NOTHING to do with R&D budget. I'm just surprised Ryzen distrupted the market as much considering how they parroted everything straight to Intel. They didn't even need to use leaks and corporate espionage, everything was served directly to them. I guess after having no competition for so long even Intel didn't believe it was real or something...
You see... this is exactly the part you don't understand.
What Intel and AMD are doing is not a race for CPU supremacy. It's not about surprising products, great reviews, leading in benchmarks or anything like that. This war only exists in heads of people like you, usually writing on forums like this one.

What actually matters for these companies is being profitable and having a stable business.
So yes, AMD was leaking badly about Zen, giving Intel time to prepare, but it doesn't matter. They had other tiny problems, like whether they will survive or not. And the whole leaking before and "defending" now has only one purpose: to show investors that AMD can make money. And it seems they actually can - that's why their market cap went up from total garbage to more expected level (considering their revenue).

I know you would love both companies to put all their effort in developing better CPUs, so that you would have more and more fps in games. But frankly, most of the world doesn't care about your fps. Even Intel and AMD don't. AMD could make Zen better for games, but why bother? This is a battle for a tiny portion of market. There's no point in becoming a leader at a huge cost. AMD simply wanted to become relevant once more - to be able to earn money on CPUs. And it seems they succeeded.

Powerful desktop CPUs are not the future. Most likely after Zen gets traction in the desktop world, AMD will put R&D money in other fields: AR/VR, AI, IoT and all these nice abbreviations. At this point they also have absolutely no product that could compete with Intel's ULV lineup and they won't cut it from their current Zen die.

who have ever said intel is faster at server?
They're not at 2x the cost, they lost in almost every benchmark metric capable.
I did.
You see... there are 2 problems with the server segment that you didn't consider:
1) Intel actually sells those Xeon CPUs, while EPYC exists only in benchmarks at this point.
2) CPU performance is not as highly prioritized as in consumer segment (let alone gaming). EPYC has to deliver in other properties as well.
 
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Powerful desktop CPUs are not the future. Most likely after Zen gets traction in the desktop world, AMD will put R&D money in other fields: AR/VR, AI, IoT and all these nice abbreviations. At this point they also have absolutely no product that could compete with Intel's ULV lineup and they won't cut it from their current Zen die.
You're kidding :confused: zen is more efficient than anything Intel has atm, excluding Denverton.

http://www.anandtech.com/bench/product/1832?vs=1851

If anything RR is the reason Intel might've been spooked & released mobile parts first, before desktop CFL.
 
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'Defends' seems a strange choice of words. Its just smart, and nobody except Intel's marketing team is 'attacking' AMD for 'glue'.

AMD's "Glue" is of better quality than Intel's TIM used with their chips is all I can say.
I mean glued or not, it works.... And you're still paying more for the crappy TIM'ed chips.

AMD is making good, efficient use of what they came up with, can't blame them for that at all and it's something for now they need to capitalize on. They don't have the R&D budget Intel certainly has and this is AMD taking their best shot and making it count every way they can - Let's hope they continue doing so because in the end everyone wins, even the Intel guys do with lower prices.

Competition is good for everyone.
 
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