Discussion Intel current and future Lakes & Rapids thread

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jpiniero

Lifer
Oct 1, 2010
14,841
5,456
136
In theory at least, with EMIB in the mix Intel could keep the CPU tiles pretty tiny. That would help mitigate the yield problems. And then do the uncore and everything else on some other node.

Sapphire Rapid is 7.
 

DrMrLordX

Lifer
Apr 27, 2000
21,808
11,165
136
In theory at least, with EMIB in the mix Intel could keep the CPU tiles pretty tiny. That would help mitigate the yield problems. And then do the uncore and everything else on some other node.

Sapphire Rapid is 7.

EMIB hasn't even been demonstrated on stage though. Intel showed off a working 10nm Cannonlake laptop some time ago and yet they still haven't delivered on that.

Are they just going to leapfrog 10nm and go straight to 7?
 

DrMrLordX

Lifer
Apr 27, 2000
21,808
11,165
136
Oh okay, i was confusing Sapphire Rapid with Cascade Lake. Hmm nevermind about that then.

It'll still be interesting to see how long Intel is stuck on 14nm variants.
 

StrangerGuy

Diamond Member
May 9, 2004
8,443
124
106
Intel far needs better uarch designers and management than process tech, period. I don't know how Intel execs keeps a straight face when their 2017 GT2 iGPU is barely faster than their 2013 one while Apple got collectively 6x faster in the same period. If this isn't a clear sign of utter mismanagement, I don't know what is.
 

majord

Senior member
Jul 26, 2015
444
533
136
Who says they have yield issues

They just launched their biggest improvement to their line-up in a decade on the same process, why would they need 10nm yet if they can milk 14nm for another year?


Most 'papery' launch in a decade maybe, (or more, I honestly can't remember an Intel launch with such low availability) but hardly the biggest improvement.
 

beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
136
Intel far needs better uarch designers and management than process tech, period. I don't know how Intel execs keeps a straight face when their 2017 GT2 iGPU is barely faster than their 2013 one while Apple got collectively 6x faster in the same period. If this isn't a clear sign of utter mismanagement, I don't know what is.

To be fair it's always easier to make big steps when you start very low. And intel foremost is a CPU company and not a GPU company. So from a bean-counter perspective I doubt they would have made more money by making bigger iGPUs. They are good enough for majority of users. You only really need a dGPU if you play modern 3D games. These users will just buy a model with a dGPU. So investing money into a better and hence also bigger iGPU would have been a waste of money from intels perspective.

Of course when Raven Ridge launches, sales might get impacted because now you don't need to compromise hard on the CPU front to get a useable iGPU. And Zen on 14nm lpp looks very, very efficient at lower clocks.
 

CHADBOGA

Platinum Member
Mar 31, 2009
2,135
832
136
In theory at least, with EMIB in the mix Intel could keep the CPU tiles pretty tiny. That would help mitigate the yield problems. And then do the uncore and everything else on some other node.
At this point I would be concerned about latency issues with cores connected via EMIB.
 
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beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
136
At this point I would be concerned about latency issues with cores connected via EMIB.

Exactly. Latency will be higher than Zen for sure and hence impact gaming. If intel actually moves to EMIB, Coffeelake will have a very, very long life at the top of gaming charts.
 
Mar 10, 2006
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At this point I would be concerned about latency issues with cores connected via EMIB.

It is unlikely that the CPU cores in a client product would be connected via EMIB (though in server this is a good way to add lots of cores). Instead, the CPU cores would be in their own complex complete with cache.

The interesting question, though, would be how the memory controller is connected. Since the memory controller would be used by all of the major blocks on the SoC, I wonder if it would be part of a discrete I/O block (basically going back to the old way of having the memory controller integrated into the chipset, but this time the chipset is close & connected via EMIB), or if it would just be in the CPU complex.

I really am curious to see the first EMIB processors come out because it's just not clear how everything will be structured/pieced together.
 
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PeterScott

Platinum Member
Jul 7, 2017
2,605
1,540
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Intel far needs better uarch designers and management than process tech, period. I don't know how Intel execs keeps a straight face when their 2017 GT2 iGPU is barely faster than their 2013 one while Apple got collectively 6x faster in the same period. If this isn't a clear sign of utter mismanagement, I don't know what is.

I think that needs to be tempered with some realism. How much faster is an AMD APU today vs 2013? Consider that AMD bought a GPU company and is in the standalone GPU business. Both AMD and Intel are constrained by memory bandwidth of dual channel mainstream platforms.

Also, how far behind were Apple GPUs to start with? It's much easier to play catch up.

Also they are looking at how many OEMs are willing to pay for more powerful iGPUs vs standard Good enough iGPUs.

Reality has a lot of issues, that forum rhetoric just ignores.
 

jpiniero

Lifer
Oct 1, 2010
14,841
5,456
136
It is unlikely that the CPU cores in a client product would be connected via EMIB (though in server this is a good way to add lots of cores). Instead, the CPU cores would be in their own complex complete with cache.

A client product likely would only have one CPU tile, although given how bad yields are, I wouldn't rule multiple tiles as an possibility.

I really am curious to see the first EMIB processors come out because it's just not clear how everything will be structured/pieced together.

The Sea-Of-Cores patent shows one possibility, with the CPU/GPU/FPGA? cores in a top die with everything else in a bottom die. Presumably they would have multiple tiles in both dies.
 

CHADBOGA

Platinum Member
Mar 31, 2009
2,135
832
136
It is unlikely that the CPU cores in a client product would be connected via EMIB (though in server this is a good way to add lots of cores). Instead, the CPU cores would be in their own complex complete with cache.

The interesting question, though, would be how the memory controller is connected. Since the memory controller would be used by all of the major blocks on the SoC, I wonder if it would be part of a discrete I/O block (basically going back to the old way of having the memory controller integrated into the chipset, but this time the chipset is close & connected via EMIB), or if it would just be in the CPU complex.

I really am curious to see the first EMIB processors come out because it's just not clear how everything will be structured/pieced together.
If EMIB isn't great for desktop users, what does that mean for Intel's future HEDT line up?
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
If EMIB isn't great for desktop users, what does that mean for Intel's future HEDT line up?

[wild speculation incoming]

Totally depends on what the CPU tile size is for Tigerlake server**. Well, that and the overall topology - like will the IMC be embedded in the uncore, in an L3$ complex or in the CPU complex. Assuming that the IMC isn't part of the CPU complex, I'd guess well see 4x4 or 16 cores for the CPU complex (which would included L1$ & L2$, but maybe not L3$). And this all depends on the actual max per pin data rates that can be sustained over the inter-complex traces in the EMIB substrate. So, in conclusion, it depends on everything . Give what AMD achieved with EPYC/Threadripper - I'm pretty interested to see what Intel's solution looks like (seems like they've put a fair bit of thought into it).

** If EMIB appears in Tigerlake. Given the rumors about Sapphire Rapids being a ground up update, part of that update could be a decoupling of SoC elements. Maybe for 7nm, even the client winds up being bifurcated.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
A client product likely would only have one CPU tile, although given how bad yields are, I wouldn't rule multiple tiles as an possibility.



The Sea-Of-Cores patent shows one possibility, with the CPU/GPU/FPGA? cores in a top die with everything else in a bottom die. Presumably they would have multiple tiles in both dies.

Don't think we'll have top and bottoms for desktop clients (logic is too dense and fast) - maybe for mobile parts. This isn't coming with Icelake, IMHO.
 

IntelUser2000

Elite Member
Oct 14, 2003
8,686
3,785
136
Is Sapphire Rapid going to be 14nm+++? I've been told 10nm++ but I don't even see 10nm+ or 10nm yet. What about Icelake? Tigerlake?

After Cascade Lake, its Icelake. Then its Sapphire Rapid on 10nm. There's a pretty good chance Icelake server would end up being the first 10nm++ part.

And this all depends on the actual max per pin data rates that can be sustained over the inter-complex traces in the EMIB substrate.

It's really high.

https://www.anandtech.com/show/1174...-stratix-10-fpga-live-blog-845am-pt-345pm-utc

12:01PM EDT - AIB a small sliver for communication and data streaming at 1 Tbps
12:09PM EDT - 20K EMIB connections up to 2 Gbps each
 
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Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
After Cascade Lake, its Icelake. Then its Sapphire Rapid on 10nm. There's a pretty good chance Icelake server would end up being the first 10nm++ part.

It's really high.

https://www.anandtech.com/show/1174...-stratix-10-fpga-live-blog-845am-pt-345pm-utc

Thanks for the info on interconnect speeds - pretty dang high and the trace lengths are short (1mm) which is better than PCIe and DDRAM so bandwidth and latency should be very good.
From the presentation:


Tons of useful data in that wrap up - those interested should (re)read it! The 55um micro-bump pitches for the complexes (SI components) offer a substantial density improvement for implementing extra pins for communication. Can't wait to see CPUs implemented this way.
 
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IntelUser2000

Elite Member
Oct 14, 2003
8,686
3,785
136
Can't wait to see CPUs implemented this way.

It's obviously not the cheapest way of doing it. It may be the cheapest way of doing very high bandwidth interconnects. That may not be true on the client side for a while however.

I can't see anywhere besides putting a mid-range discrete class iGPU where EMIB would make sense on the client side. Everywhere else they are better off doing monolithic or MCM packaging. They need further monolithic integration with the PCH, so they can bring Core chip based platforms down into power levels Atom and ARM chips are at.
 

jpiniero

Lifer
Oct 1, 2010
14,841
5,456
136
After Cascade Lake, its Icelake. Then its Sapphire Rapid on 10nm. There's a pretty good chance Icelake server would end up being the first 10nm++ part.

The Lenovo leak mentioned "Ice Lake Refresh" which I take to mean Tigerlake. And Tigerlake (well the CPU cores anyway) is really just Icelake on 10++.

No reason to think SR isn't 7 at this point. But it would likely only be the CPU cores themselves on 7.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
It's obviously not the cheapest way of doing it. It may be the cheapest way of doing very high bandwidth interconnects. That may not be true on the client side for a while however.

I can't see anywhere besides putting a mid-range discrete class iGPU where EMIB would make sense on the client side. Everywhere else they are better off doing monolithic or MCM packaging. They need further monolithic integration with the PCH, so they can bring Core chip based platforms down into power levels Atom and ARM chips are at.

Lot's of pins needed, especially for desktop CPUs. Works great for mobile processor with soldered components. I'd settle for an upgraded DMI spec based on PCIe 4/5.
 
Mar 10, 2006
11,715
2,012
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The Lenovo leak mentioned "Ice Lake Refresh" which I take to mean Tigerlake. And Tigerlake (well the CPU cores anyway) is really just Icelake on 10++.

No reason to think SR isn't 7 at this point. But it would likely only be the CPU cores themselves on 7.

Ice Lake Refresh refers to a refresh of the platform to include an Ice Lake-based processor family.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
Ice Lake Refresh refers to a refresh of the platform to include an Ice Lake-based processor family.

It's a rumor, but I wonder if TigerLake still exists and if Sapphire Rapids has been pushed out (actually, seems like SR would have to be pushed out).
 
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