With AMD’s Zen 5 CPU architecture only a month away from its first product releases, the new CPU architecture was placed front and center for AMD’s prime Computex 2024 keynote. Outlining how Zen 5 will lead to improved products across AMD’s entire portfolio, the company laid out their product plans for the full triad: mobile, desktop, and servers. And while server chips will be the last parts to be released, AMD also saved the best for last by showcasing a 192 core EPYC “Turin” chip.
Turin is the catch-all codename for AMD’s Zen 5-based EPYC server processors – what will presumably be the EPYC 9005 series. The company has previously disclosed the name in earnings calls and other investor functions, outlining that the chip was already sampling to customers and that the silicon was “looking great.”
The Computex reveal, in turn, is the first time that the silicon has been shown off to the public. And with it, we’ve received the first official confirmation of the chip’s specifications. With SKUs up to 192 CPU cores, it’s going to be a monster of an x86 CPU.
AMD EPYC CPU Generations
AnandTech
EPYC 5th Gen
(Turin, Z5c)
EPYC 9704
(Bergamo)
EPYC 9004
(Genoa)
EPYC 7003
(Milan)
CPU Architecture
Zen 5c
Zen 4c
Zen 4
Zen 3
Max CPU Cores
192
128
96
64
Memory Channels
12 x DDR5
12 x DDR5
12 x DDR5
8 x DDR4
PCIe Lanes
128 x 5.0
128 x 5.0
128 x 5.0
128 x 4.0
L3 Cache
?
256MB
384MB
256MB
Max TDP
360W?
360W
400W
280W
Socket
SP5
SP5
SP5
SP3
Manufacturing
Process
CCD: TSMC N3
IOD:TSMC N6
CCD: TSMC N5
IOD: TSMC N6
CCD: TSMC N5
IOD: TSMC N6
CCD: TSMC N7
IOD: GloFo 14nm
Release Date
H2’2024
06/2023
11/2022
03/2021
Though only a brief tease, AMD’s Turin showcase did confirm a few, long-suspected details about the platform. AMD will once again be using their socket SP5 platform for Turin processors, which means the chips are drop-in compatible with EPYC 9004 Genoa (and Bergamo). The reuse of SP5 means that customers and server vendors can immediately swap out chips without having to build/deploy whole new systems. It also means that Turin will have the same base memory and I/O options as the EPYC 9004 series: 12 channels of DDR5 memory, and 128 PCIe 5.0 lanes.
In terms of power consumption, existing SP5 processors top out at 400 Watts, and we’d expect the same for these new, socket-compatible chips.
As for the Turin chip itself, while AMD is not going into further detail on its configuration, all signs point to this being a Zen 5c configuration – that is, built using CCDs designed around AMD’s compact Zen 5 core configuration. This would make the Turin chip on display the successor to Bergamo (EPYC 9704), which was AMD’s first compact core server processor, using Zen 4c cores. AMD’s compact CPU cores generally trade off per-core performance in favor of allowing more CPU cores overall, with lower clockspeed limits (by design) and less cache memory throughout the chip.
According to AMD, the CCDs on this chip were fabbed on a 3nm process (undoubtedly TSMC’s), with AMD apparently looking to take advantage of the densest process available in order to maximize the number of CPU cores the can place on a single chip. Even then, the CCDs featured here are quite sizable, and while we’re waiting for official die size numbers, it would come as no surprise if Zen 5’s higher transistor count more than offset the space savings of moving to 3nm. Still, AMD has been able to squeeze 12 CCDs on to the chip – 4 more than Bergamo – which is what’s allowing them to offer 192 CPU cores instead of 128 as in the last generation.
Meanwhile, the IOD is confirmed to be produced on 6nm. Judging from that fact, the pictures, and what AMD’s doing with their Zen 5 desktop products, there is a very good chance that AMD is using either the same or a very similar IOD as on Genoa/Bergamo. Which goes hand-in-hand with the socket/platform at the other end of the chip staying the same.
AMD’s brief teaser did not discuss at all any other Turin configurations. So there is nothing else official to share about Turin chips built using full-sized Zen 5 CPU cores. With that said, we know that the full-fat cores going into the Ryzen 9000 desktop series pack 8 cores to a CCD and are being fabbed on a 4nm process – not 3nm – so that strongly implies that EPYC Zen 5 CCDs will be the same. Which, if that pans out, means that Turin chips using high performance cores will max out at 96 cores, the same as Genoa.
Hardware configurations aside, AMD also showcased a couple of benchmarks, pitting the new EPYC chips against Intel’s Xeons. As you’d expect in a keynote teaser, AMD was winning handily. Though it is interesting to note that the chips benchmarked were all 128 core Turins – which means those benchmarks may have been on chips using the full-fat cores.
AMD will be shipping EPYC Turin in the second half of this year. More details on the chips and configurations will follow once AMD gets closer to the EPYC launch.
