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AMD Announces the "Zen 5" Microarchitecture and EPYC "Turin" Processor on 4nm

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AMD in its Financial Analyst Day 2022 presentation, unveiled its next-generation "Zen 5" CPU microarchitecture. The company's latest CPU microarchitecture roadmap also confirms that variants of its "Zen 4" CCDs with 3D Vertical Cache (3DV Cache) are very much in the works, and there will be variants of the EPYC "Genoa" processors with 3DV Cache, besides standard ones.

AMD stated that it completed the design goal of the current "Zen 3" architecture, by building it on both 7 nm and 6 nm nodes (the latter being the client "Rembrandt" processor). The new "Zen 4" architecture will debut on the 5 nm node (TSMC N5), and could see a similar optical shrink to the newer 4 nm node somewhere down the line, although AMD wouldn't specify whether it's on the enterprise segment, or client. The next-gen "Zen 5" architecture will debut on 4 nm, and see an optical shrink to 3 nm on some future product.



The EPYC enterprise processor based on "Zen 5" will be codenamed "Turin." The company didn't detail the processor, but did offer the first teaser about what's in store with "Zen 5." Like every other "Zen" architecture generation before it, "Zen 5" will introduce performance and efficiency enhancements (IPC increase and performance/Watt increase from the transition to a new foundry node). AMD is redesigning the front-end of the CPU core, and re-pipelining it for wide issue, which indicates a much broader execution stage.

AMD also teases AI/ML optimizations—this could indicate fixed-function hardware building on the AI/ML capabilities of "Zen 4." On the "Zen 4," AMD is deploying AVX-512 BLOAT16 and VNNI extensions as part of the CPU core's ISA, without any external fixed-function hardware (like Intel's GNA). In our interview with AMD's Robert Hallock, he didn't rule out the possibility of such hardware in "future developments," given AMD's acquisition of Xilinx.

AMD's roadmap hints at a 2024 debut for "Zen 5" and the EPYC "Turin" processor. We'll come across several other codenames, both from the enterprise and client segments, for products based on "Zen 5," in the coming months.

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AMD's roadmap sounds fairly ambitious considering the current crises in the world. It is encouraging that the new CPU generations are going to continue delivering "performance and efficiency enhancements" encompassing both improved IPC and performance per Watt. In a moment of rising energy prices this approach may turn out to be very beneficial.
 
So there will be variants with the 3dVcache. Nice. I wonder if these will be released the same way as the 5800x3d or rather alongside the regular products.
 
Ah so I was right, we'd hopefully see all 3 zen4 variants in desktops at some point in time!
 
Yep, looks like AMD will be relegated to 4nm while Intel and Apple get all the 3nm candy from TSMC early on. Looking more and more like the rumours were right about Intel buying AMD out of 3nm early shipping.
 
Yep, looks like AMD will be relegated to 4nm while Intel and Apple get all the 3nm candy from TSMC early on. Looking more and more like the rumours were right about Intel buying AMD out of 3nm early shipping.
AMD won't care. Intel's timetable is total BS and is already slipping. Raptor Lake shipping late and will barely start shipping in December. Sapphire Rapids delayed and this will cascade down the food chain. By the time Intel actually gets to use TSMC N3 AMD will probably be able to get supply. AMD prefers to go with the refined node than the cutting edge node and would always prefer a proven N4 over a fresh N3
 
At the rate AMD's going they can easily beat Intel with a node down! In fact Intel really needs their node lead, like they had with Zen on 14nm.
 
AMD won't care. Intel's timetable is total BS and is already slipping. Raptor Lake shipping late and will barely start shipping in December. Sapphire Rapids delayed and this will cascade down the food chain. By the time Intel actually gets to use TSMC N3 AMD will probably be able to get supply. AMD prefers to go with the refined node than the cutting edge node and would always prefer a proven N4 over a fresh N3

But these delays you mention are because of issues with Intel's fabs right? I would assume that both Intel and AMD are tied to TSMC's ability to deliver for N3 and N4 respectively. So a delay for Intel now might not affect the deliveries of N3 chips.
 
So there will be variants with the 3dVcache. Nice. I wonder if these will be released the same way as the 5800x3d or rather alongside the regular products.
Will Zen 4 use 3dVcache? I did not see anything about it when they released data a few weeks ago and I would think they would want to use the tech on their next lineup with some of the gaming performance improvements.
 
Will Zen 4 use 3dVcache? I did not see anything about it when they released data a few weeks ago and I would think they would want to use the tech on their next lineup with some of the gaming performance improvements.
They announced yesterday that we'll see 3dVcache with zen4 too.
 
They announced yesterday that we'll see 3dVcache with zen4 too.
Will be curious if they will have the higher clockspeeds on 3dVcache chips. I am upgrading my platform this year and I think the 3dVcache performance boost in gaming will pull me away from an Intel CPU time around.
 
But these delays you mention are because of issues with Intel's fabs right? I would assume that both Intel and AMD are tied to TSMC's ability to deliver for N3 and N4 respectively. So a delay for Intel now might not affect the deliveries of N3 chips.
But AMD is launching Zen 5 with n4, not n3 and will only move to n3 if available and/or meets it targets. The roiadmaps shows Zen 5 as n4/n3. We might get Zen 5+ with n3 if possible. Intel won't be ready for n3 anyway I suspect when they say.
 
It seems that at Zen front AMD will be very competitive with Intel
When they start to integrate ZenA with ZenBc cores Intel's multithreading advantage will go poof, so gaming performance will dictate even more the narrative/pricing, so Intel must execute otherwise i smell troubles.
Even if there is a delay for Raptor Lake and comes at Q4 instead of August, I don't consider it problem as Alder Lake has better lineup vs Zen3, so there is really no pressing competition to force Intel to launch before Zen4 (as long as it launches very close to Zen4 and there is a 2023 follow-up capable to compete with Zen4 V-cache regarding gaming performance (that's the main uncertainty imo)
So we will have 4nm for Zen4 APU (Phoenix Point) that's good news for the mobile front also (it seems that AMD's intention is Zen5 APU to be 3nm if it finds capacity)
Also another thought based on Genoa-X info is that maybe Zen4 Raphael has only 32MB L3 cache with V-cache version reaching 96MB, this will explain the smaller IPC gain btw.
 
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