'

AMD Zen Quad Core Block Diagram Released

New Page

AMD Releases More Carrizo Details at ISSCC

AMD Zen Quad Core Block Diagram Released

 

Yesterday an AMD CPU Block Diagram of their new Zen Architecture had been released, and now a Diagram of AMD's Quad Core Zen Unit has been released. Right now AMD's Zen architecture looks promising, bit remember that these Diagrams are highly simplified and contains no real information which relates to performance of AMD's Zen Architecture. 

AMD's Zen CPU cores are rumored to be coming in 2016 on Global Foundries' 14nm FinFET process and from the CPU block design we see below AMD will be focusing on Zen's per core CPU performance, rather than focusing on delivering more, but limited, CPU cores.

Rather than iterating on the AMD Bulldozer CMT design, AMD has returned to a single fetch, single decode design. This means that AMD is focusing on a single more powerful CPU in it's CPU block rather than 2 weaker CPU parts that share resources. As we can see below AMD will be widening the Integer Pipeline of Zen by 50% compared to excavator and will be replacing the dual 128-bit Floating point schedulers with dual 256-bit schedulers, which together should allow AMD's new cores to have dramatically better integer and floating point performance per CPU core, especially as the CPU's Floating point units no longer feed two CPU cores. 

AMD's Zen CPU cores will be available as a single Quad core unit, which can be combined to create larger CPUs, 2 Quad Core units make and 8 core, 4 CPU Units make a 16 core, etc, etc. Multiple Quad Core CPU units will be connected together via high speed interconnects. Doing this will allow AMD to more easily scale the Zen Architecture from High performance, high core count application like servers to more consumer and lower power applications. 

This will not stop AMD from creating Dual core CPUs or other CPU corecounts as AMD can disable any of the 4 cores in a Zen Quad core unit, similar to how Intel Disables cores in certain CPUs  or the components required for Hyper-Threading in their i5's.

 

AMD Zen CPU Block Diagram Released

 

 

So far the AMD Zen CPU cores are looking a lot like the Phenom's of the past, which fills me with a lot of excitement as I used to own an AMD Phenom II 1090T, one of AMD's best CPUs of recent years, which was sadly replaced by the rather disappointing AMD Bulldozer lineup.

AMD's Zen CPUs will debut in 2016 with Summit Ridge, which will come with a new socket and with DDR4 support, which should hopefully bring AMD back into the races against Intel who have been rather relaxed when it comes to CPU performance improvement, focusing more on mobile and other low power applications.  

According to the slide below an AMD Zen Quad core Unit will have 512KB of L2 Cache per core and 8MB of L3 cache per Quad Core Unit, with AMd saying that it's low latency for high performance, but again we have no idea how their new cache compared to AMD's previous designs in terms of performance.

 

AMD Zen Quad Core Block Diagram Released  

In summary we should expect to see a significant leap in CPU single core performance with AMD's Zen processor, thanks to a doubling of floating point capacity and a increase in single threaded integer capability, though until AMD releases more dedails we cannot quantify this in any way.

AMD's move to focus on more powerful single threads will hopefully help them to gain ground back from Intel when it launches next year, as  a higher count of weaker cores does not help in the majority of programs. We must remember that they have a lot to ground to cover in order to catch up with Intel in terms of single threaded performance.

 

You can join the discussion on AMD's Zen Quad Core Block Diagram on the OC3D Forums.

 

 

An Block Diagram for A Quad core module of AMD's new Zen Architecture has been released.http://www.overclock3d.net/articles/cpu_mainboard/amd_zen_quad_core_block_diagram_released/1

Posted by OC3D on Wednesday, 29 April 2015
«Prev 1 Next»

Most Recent Comments

29-04-2015, 09:09:15

shambles1980
I think it looks quite promising for a quad core cpu from amd to be honest..
Could be interesting to see what they do with it as they push it further at later dates.

it does seem to imply that amd do not have much hope for dx 12 bringing the 8 module "AKA core" cpu's they already have up to a point that beats intels quads consistently across the board though, which is really what they needed to do for the majority.Quote

29-04-2015, 12:20:58

NeverBackDown
Isn't this the same as the other Zen thread but with 4 cores instead of a single core diagram?

I'm still wondering if they have sacrificed any multi threading capabilities compared to Piledriver as they really shined in those situations. Hopefully they kept it at least the same while massively increasing their single threaded performance.. especially since they probably need both for new APIs in the gaming side of things.Quote

29-04-2015, 13:01:39

WYP
Quote:
Originally Posted by NeverBackDown View Post
Isn't this the same as the other Zen thread but with 4 cores instead of a single core diagram?

I'm still wondering if they have sacrificed any multi threading capabilities compared to Piledriver as they really shined in those situations. Hopefully they kept it at least the same while massively increasing their single threaded performance.. especially since they probably need both for new APIs in the gaming side of things.
Ads a little more detail on the cache and fills on a few more blanks, but we really need AMD to talk about the architecture more before we can make any guesses to performance .Quote

29-04-2015, 13:03:57

shambles1980
i cant see any reason why they would suffer at multi threding, they should really be better than a bull dozer at multi threading going by the lay out.
think the only reall worry with this type of layout is the pipelines.
I think with the fx chips they made them as short as possible which should have been good in theory, but having to share fp units and so on did cause them to suffer at points.

these zen things do look a lot like what they should have done with the bulldozer chips to start it..
also the 8MB l3 seems to imply that it will either be working pretty damned fast, or that the 4 cores and 8 cores will be the same but with locked cores on the 4 core version. But seemingly no changes to the L3...

like i said though i do hope to see this pushed to its full potential within 2-3 revisions..

Havings said that though if they decide low powered is the way to go i guess that is their choice if they want to keep the console market cornered.. But if what this says is true "being low powered or high performance as an option" then it could be a good few years coming up for upgrades.Quote
Reply
x

Register for the OC3D Newsletter

Subscribing to the OC3D newsletter will keep you up-to-date on the latest technology reviews, competitions and goings-on at Overclock3D. We won't share your email address with ANYONE, and we will only email you with updates on site news, reviews, and competitions and you can unsubscribe easily at any time.

Simply enter your name and email address into the box below and be sure to click on the links in the confirmation emails that will arrive in your e-mail shortly after to complete the registration.

If you run into any problems, just drop us a message on the forums.