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Rumor: AMD Epyc2 processors could get 64 cores over 8+1 dies
That AMD has been going insanely strong with many-core processors is not a surprise, you've read all our Threadripper reviews and have learned that the top tier processors (e.g. 32-core versions) have four dies each holding 8 CPU cores. So what does the future bring? Well, how do 64 cores over eight dies sound?
The chatter at the moment is based on an 8+1 version block diagram spreading on the web, with 8 dies and 8-cores per die you are looking at 64 cores and 128 Threads. Obviously, that kind of design would apply towards AMD Epyc2 processors or even later revisions. The extra (middle) die is intended for a dedicated system controller chip.
The dies would all be connected over the infinity fabric with a dedicated system controller. This new rumor was derived from ComputerBase who noticed information from SemiAccurate plus sketches that an engineer has put on Twitter. In his own words, these sketches are his interpretation of how AMD would build the upcoming server processors. Backtracing the twitter account I noticed that the block diagrams have been posted by K.H. Chia, he is a retired engineer. So if this is just an example showcase present to AMD or not, we cannot verify. So how true or false these new design sketches are, remains to be seen but for now I rate this as some speculation at best. The architecture is listed as Rome.
If AMD shrinks the dies towards 7nm next year, effectively they have a die half the size of what it currently is. More dies would fit on the same surface. Placing a chip in the middle that is connected to all the CPU-dies could result in less latency than in the current design where the ccx's are interconnected via the Infinity Fabric.
AMD has officially not yet published any specific about the Epyc 2 server processors. The manufacturer has said that the processors are made on the 7nm process of TSMC and that they will become next year.
Rumor: AMD Might Host Threadripper 2000 event in Scuderia Ferrari’s hometown Maranello - 06/30/2018 06:36 PM
A new rumor has surfaced on the web today, AMD would be celebrating it's one-year HEDT Threadripper release, with an event planned for Threadripper 2. This launch event would take place in Maranello,...
Rumor: ASUS Would be Repositioning AMD Graphics cards under a new AREZ brand - 04/06/2018 04:07 PM
The uncomfortable GPP discussion does not seem to stop, some new info just surfaced. It's unconfirmed but from the looks of it, ASUS will be rebranding their Radeon lineup and moving them away from A...
Rumor: ASRock is going to make graphics cards - 03/07/2018 02:30 PM
According to Digitimes, ASRock has active plans to start fabbing graphics cards. ASRock would release AMD cards solely, and in April the first one should surface....
Rumor: AMD Radeon 490 and 490X Polaris graphics cards launch end of June - 04/07/2016 01:33 PM
In line with expectations today some new rumors surfaced on the mighty WWW. AMD possibly will have its first Polaris based series 400 Radeon graphics cards available in June, this would invoke the R9 ...
Rumor: AMD gets priority advantage to Hynix HBM2 - 07/15/2015 09:48 AM
This is an interesting story, apparently AMD secured the luxury of getting exclusive access to Hynix HBM2 graphics memory. The second iteration of High bandwith memory (stacked memory to be used on-d...
djmcave
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#5601980 Posted on: 10/31/2018 11:47 AM
With every CTX being produced individually it should keep costs down... Wondering if they intend to do the same on the GPUs.
With every CTX being produced individually it should keep costs down... Wondering if they intend to do the same on the GPUs.
sverek
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#5601981 Posted on: 10/31/2018 11:49 AM
Can you glue GPUs together? Wouldn't it be crossfire?
With every CTX being produced individually it should keep costs down... Wondering if they intend to do the same on the GPUs.
Can you glue GPUs together? Wouldn't it be crossfire?
Fediuld
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#5601984 Posted on: 10/31/2018 12:14 PM
AMD has developed Infinity Fabric for GPUs, and was announced back in August with all the 7nm GPUs supporting it. In addition to pcie4.0. (next round of ryzen boards support it)
So the bandwidth is there, after all CF didn't needed a separate bridge since Hawaii in 2013.
Can you glue GPUs together? Wouldn't it be crossfire?
AMD has developed Infinity Fabric for GPUs, and was announced back in August with all the 7nm GPUs supporting it. In addition to pcie4.0. (next round of ryzen boards support it)
So the bandwidth is there, after all CF didn't needed a separate bridge since Hawaii in 2013.
HWgeek
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#5601990 Posted on: 10/31/2018 12:32 PM
https://forums.guru3d.com/threads/amds-rome-is-rumored-to-be-designed-with-8-zen2-dies-can-it-look-like-this.423107/
https://forums.guru3d.com/threads/amds-rome-is-rumored-to-be-designed-with-8-zen2-dies-can-it-look-like-this.423107/
Fox2232
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#5602002 Posted on: 10/31/2018 01:15 PM
It would be crazy if they decoupled CPU cores from uncore this way. Because from what I have seen Cores themselves can clock higher, it is all that stuff around which does not like it on 2700X.
It would be crazy if they decoupled CPU cores from uncore this way. Because from what I have seen Cores themselves can clock higher, it is all that stuff around which does not like it on 2700X.
Evildead666
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#5602017 Posted on: 10/31/2018 01:55 PM
Can you glue GPUs together? Wouldn't it be crossfire?
AMD has developed Infinity Fabric for GPUs, and was announced back in August with all the 7nm GPUs supporting it. In addition to pcie4.0. (next round of ryzen boards support it)
So the bandwidth is there, after all CF didn't needed a separate bridge since Hawaii in 2013.
Yup, this is going to be the new normal.
This way, you get the System Controller with everything you need, on a slightly older process, due ot it not needing to be going at break-neck speed, in fact it would be better because the PCIe Controllers and SATA controllers wouldn't be bothered by the CPU speeds anymore.
The CPU's would be able to be done much cheaper on the latest fab processes, with much faster chips, and better yields.
GPU's would be the exact same idea, just with more "cores" per "GPU-CCX".
Four cores per CPU-CCX now, maybe ~2048 cores per GPU-CCX ? (about Polaris 30 type, but with Navi)
Can you glue GPUs together? Wouldn't it be crossfire?
AMD has developed Infinity Fabric for GPUs, and was announced back in August with all the 7nm GPUs supporting it. In addition to pcie4.0. (next round of ryzen boards support it)
So the bandwidth is there, after all CF didn't needed a separate bridge since Hawaii in 2013.
Yup, this is going to be the new normal.
This way, you get the System Controller with everything you need, on a slightly older process, due ot it not needing to be going at break-neck speed, in fact it would be better because the PCIe Controllers and SATA controllers wouldn't be bothered by the CPU speeds anymore.
The CPU's would be able to be done much cheaper on the latest fab processes, with much faster chips, and better yields.
GPU's would be the exact same idea, just with more "cores" per "GPU-CCX".
Four cores per CPU-CCX now, maybe ~2048 cores per GPU-CCX ? (about Polaris 30 type, but with Navi)
Arbie
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#5602040 Posted on: 10/31/2018 03:06 PM
AdoredTV on Youtube has some very good presentations, including a brand new one on this topic - which he previewed some time ago.
(Though anyone not a native speaker of English may have a 'herd toim' following it).
AdoredTV on Youtube has some very good presentations, including a brand new one on this topic - which he previewed some time ago.
(Though anyone not a native speaker of English may have a 'herd toim' following it).
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#5602049 Posted on: 10/31/2018 03:24 PM
8 cores in 64 nm^2 ??? isn't that waaaaaaay too low ?
8 cores in 64 nm^2 ??? isn't that waaaaaaay too low ?
tunejunky
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#5602059 Posted on: 10/31/2018 03:46 PM
Yes you can, it is roadmapped.
No, it wouldn't be crossfire, it would act as a single gpu in exactly the same way as threadripper and ryzen.
this is the high-end 7nm gpu from AMD that will be announced at the end of next year.
scalability is the single highest goal at AMD.
there will not be any performance goals that cannot be met because of Moore's Law, which was the driving force behind the design.
they can just add graphic cores.
so for the first time ever in a gpu there will be "moar cores". and double gpu's do not count because those are crossfired or SLI'd.
Can you glue GPUs together? Wouldn't it be crossfire?
Yes you can, it is roadmapped.
No, it wouldn't be crossfire, it would act as a single gpu in exactly the same way as threadripper and ryzen.
this is the high-end 7nm gpu from AMD that will be announced at the end of next year.
scalability is the single highest goal at AMD.
there will not be any performance goals that cannot be met because of Moore's Law, which was the driving force behind the design.
they can just add graphic cores.
so for the first time ever in a gpu there will be "moar cores". and double gpu's do not count because those are crossfired or SLI'd.
tunejunky
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#5602065 Posted on: 10/31/2018 03:52 PM
very true at 12nm.
if they use a "hub" design for the controller a la "epyc 2" as shown, that would be a major difference.
also remaining to be seen is whether or not HBM2 is going to be used and/or if the related costs have come down. there very well may be a "HBM 3" made at a smaller node as well, which would lower the cost (after production costs are earned back).
It would be crazy if they decoupled CPU cores from uncore this way. Because from what I have seen Cores themselves can clock higher, it is all that stuff around which does not like it on 2700X.
very true at 12nm.
if they use a "hub" design for the controller a la "epyc 2" as shown, that would be a major difference.
also remaining to be seen is whether or not HBM2 is going to be used and/or if the related costs have come down. there very well may be a "HBM 3" made at a smaller node as well, which would lower the cost (after production costs are earned back).
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#5602068 Posted on: 10/31/2018 03:54 PM
i was thinking re: gpu on the above comments Fox
i was thinking re: gpu on the above comments Fox
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#5602081 Posted on: 10/31/2018 04:15 PM
Its not exactly news. Uncore and actual CPU cores have been using seperate clock domains in various CPUs everywhere.
It would be crazy if they decoupled CPU cores from uncore this way. Because from what I have seen Cores themselves can clock higher, it is all that stuff around which does not like it on 2700X.
Its not exactly news. Uncore and actual CPU cores have been using seperate clock domains in various CPUs everywhere.
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#5602085 Posted on: 10/31/2018 04:38 PM
My first thought was wondering why the system controller wasn't also 7nm, as it surely is a much simpler circuit design than a single cpu. But according to the diagram, if they did that where would they physically position the cores relative to the controller?...Just an errant thought...
My first thought was wondering why the system controller wasn't also 7nm, as it surely is a much simpler circuit design than a single cpu. But according to the diagram, if they did that where would they physically position the cores relative to the controller?...Just an errant thought...
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#5602089 Posted on: 10/31/2018 04:50 PM
The controller it's rumored to be 14nm because it's bigger than the other chips and the process is not mature enough for such a large chip on 7nm and decent yields
The controller it's rumored to be 14nm because it's bigger than the other chips and the process is not mature enough for such a large chip on 7nm and decent yields
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I wonder if data centers waiting for it, instead of jumping on Zen1