AMD has unveiled its latest EPYC processors, codenamed "Turin," featuring Zen 5 and Zen 5C dense cores. Phoronix's thorough testing reveals remarkable advancements in performance, efficiency, and value. The new lineup includes the EPYC 9575F (64-core), EPYC 9755 (128-core), and EPYC 9965 (192-core) models, all showing impressive capabilities across various server and HPC workloads. In benchmarks, a dual-socket configuration of the 128-core EPYC 9755 Turin outperformed Intel's dual Xeon "Granite Rapids" 6980P setup with MRDIMM-8800 by 40% in the geometric mean of all tests. Surprisingly, even a single EPYC 9755 or EPYC 9965 matched the dual Xeon 6980P in expanded tests with regular DDR5-6400. Within AMD's lineup, the EPYC 9755 showed a 1.55x performance increase over its predecessor, the 96-core EPYC 9654 "Genoa". The EPYC 9965 surpassed the dual EPYC 9754 "Bergamo" by 45%.

These gains come with improved efficiency. While power consumption increased moderately, performance improvements resulted in better overall efficiency. For example, the EPYC 9965 used 32% more power than the EPYC 9654 but delivered 1.55x the performance. Power consumption remains competitive: the EPYC 9965 averaged 275 Watts (peak 461 Watts), the EPYC 9755 averaged 324 Watts (peak 500 Watts), while Intel's Xeon 6980P averaged 322 Watts (peak 547 Watts). AMD's pricing strategy adds to the appeal. The 192-core model is priced at $14,813, compared to Intel's 128-core CPU at $17,800. This competitive pricing, combined with superior performance per dollar and watt, has resonated with hyperscalers. Estimates suggest 50-60% of hyperscale deployments now use AMD processors.

TrendForce underscores that the primary momentum for server shipments this year remains with American CSPs. However, due to persistently high inflation and elevated corporate financing costs curtailing capital expenditures, overall demand has not yet returned to pre-pandemic growth levels. Global server shipments are estimated to reach approximately. 13.654 million units in 2024, an increase of about 2.05% YoY. Meanwhile, the market continues to focus on the deployment of AI servers, with their shipment share estimated at around 12.1%.

Foxconn is expected to see the highest growth rate, with an estimated annual increase of about 5-7%. This growth includes significant orders such as Dell's 16G platform, AWS Graviton 3 and 4, Google Genoa, and Microsoft Gen9. In terms of AI server orders, Foxconn has made notable inroads with Oracle and has also secured some AWS ASIC orders.

Yesterday, Intel unveiled its latest Xeon data center processors, codenamed Emerald Rapids, delivering the new Xeon Platinum 8592+ flagship SKU with 64 cores and 128 threads. Packed into its fresh silicon, Intel promises boosted performance and reduced power hunger. The comprehensive tech benchmarking website Phoronix essentially confirms Intel's pitch. Testing production servers running the new 8592+ showed solid gains over prior Intel models, let alone older generations still commonplace in data centers. On average, upgrading to the 8592+ increased single-socket server performance by around 23.5% compared to the previous generation configs of Sapphire Rapid, Xeon Platinum 8490H. The dual-socket configuration records a 17% boost in performance.

However, Intel is not in the data center market by itself. AMD's 64-core offering that Xeon Platinum 8592+ is competing with is AMD EPYC 9554. The Emerald Rapids chip is faster by about 2.3%. However, AMD's lineup doesn't stop at only 64 cores. AMD's Genoa and Genoa-X with 3D V-cache top out at 96 cores, while Bergamo goes up to 128 cores. On the power consumption front, the Xeon Platinum 8592+ was pulling about 289 Watts compared to the Xeon Platinum 8490H average of 306 Watts. At peak, the Xeon Platinum 8592+ CPU managed to hit 434 Watts compared to the Xeon Platinum 8490H peak of 469 Watts. This aligns with Intel's claims of enhanced efficiency. However, compared to the 64-core counterpart from AMD, the EPYC 9554 had an average power consumption of 227 Watts and a recorded peak of 369 Watts.

Intel's upcoming Sierra Forest Xeon server chip has debuted on Geekbench 6, showcasing its potential in multi-core performance. Slated for release in the first half of 2024, Sierra Forest is equipped with up to 288 Efficiency cores, positioning it to compete with AMD's Zen 4c Bergamo server CPUs and other ARM-based server chips like those from Ampere for the favor of cloud service providers (CSP). In the Geekbench 6 benchmark, a dual-socket configuration featuring two 144-core Sierra Forest CPUs was tested. The benchmark revealed a notable multi-core score of 7,770, surpassing most dual-socket systems powered by Intel's high-end Xeon Platinum 8480+, which typically scores between 6,500 and 7,500. However, Sierra Forest's single-core score of 855 points was considerably lower, not even reaching half of that of the 8480+, which manages 1,897 points.

The difference in single-core performance is a matter of choice, as Sierra Forest uses Crestmont-derived Sierra Glen E-cores, which are more power and area-efficient, unlike the Golden Cove P-cores in the Sapphire Rapids-based 8480+. This design choice is particularly advantageous for server environments where high-core counts are crucial, as CSPs usually partition their instances by the number of CPU cores. However, compared to AMD's Bergamo CPUs, which use Zen 4c cores, Sierra Forest lacks pure computing performance, especially in multi-core. The Sierra Forest lacks hyperthreading, while Bergaamo offers SMT with 256 threads on the 128-core SKU. Comparing the Geekbench 6 scores to AMD Bergamo EPYC 9754 and Sierra Forest results look a lot less impressive. Bergamo scored 1,597 points in single-core, almost double that of Sierra Forest, and 16,455 points in the multi-core benchmarks, which is more than double. This is a significant advantage of the Zen 4c core, which cuts down on caches instead of being an entirely different core, as Intel does with its P and E-cores. However, these are just preliminary numbers; we must wait for real-world benchmarks to see the actual performance.

AMD today announced revenue for the second quarter of 2023 of $5.4 billion, gross margin of 46%, operating loss of $20 million, net income of $27 million and diluted earnings per share of $0.02. On a non-GAAP basis, gross margin was 50%, operating income was $1.1 billion, net income was $948 million and diluted earnings per share was $0.58.

"We delivered strong results in the second quarter as 4th Gen EPYC and Ryzen 7000 processors ramped significantly," said AMD Chair and CEO Dr. Lisa Su. "Our AI engagements increased by more than seven times in the quarter as multiple customers initiated or expanded programs supporting future deployments of Instinct accelerators at scale. We made strong progress meeting key hardware and software milestones to address the growing customer pull for our data center AI solutions and are on-track to launch and ramp production of MI300 accelerators in the fourth quarter."

AMD on Tuesday (June 13) launched the EPYC 9004 "Bergamo" 128-core/256-thread high density compute server processor, and with it, debuted the new "Zen 4c" CPU microarchitecture. A lot had been made out about Zen 4c in the run up to yesterday's launch, such as rumors that it is a Zen 4 "lite" core that has lesser number-crunching muscle, and hence lower IPC, and that Zen 4c is AMD's answer to Intel's E-core architectures, such as "Gracemont" and "Crestmont." It turns out that it's neither a lite version of Zen 4, nor is it an E-core, but a physically compacted version of the Zen 4 core, with identical number crunching machinery.

First things first—Zen 4c has the same exact IPC as Zen 4 (that's performance at a given clock-speed). This is because its front-end, execution stage, load/store component, and internal cache hierarchy is exactly the same. It has the same 88-deep load queue, 64-deep store queue, the same 675,000 µop cache, the exact same INT+FP issue width of 10+6, the same exact INT register file, the same scheduler, and cache latencies. The L1I and L1D caches are the same 32 KB in size as "Zen 4," and so is the dedicated L2 cache, at 1 MB.

Today, at the "Data Center and AI Technology Premiere," AMD announced the products, strategy and ecosystem partners that will shape the future of computing, highlighting the next phase of data center innovation. AMD was joined on stage with executives from Amazon Web Services (AWS), Citadel, Hugging Face, Meta, Microsoft Azure and PyTorch to showcase the technological partnerships with industry leaders to bring the next generation of high performance CPU and AI accelerator solutions to market.

"Today, we took another significant step forward in our data center strategy as we expanded our 4th Gen EPYC processor family with new leadership solutions for cloud and technical computing workloads and announced new public instances and internal deployments with the largest cloud providers," said AMD Chair and CEO Dr. Lisa Su. "AI is the defining technology shaping the next generation of computing and the largest strategic growth opportunity for AMD. We are laser focused on accelerating the deployment of AMD AI platforms at scale in the data center, led by the launch of our Instinct MI300 accelerators planned for later this year and the growing ecosystem of enterprise-ready AI software optimized for our hardware."

A SemiAnalysis report sheds light on just how much smaller the "Zen 4c" CPU core is compared to the regular "Zen 4." AMD's upcoming high core-count enterprise processor for cloud data-center deployments, the EPYC "Bergamo," is based on the new "Zen 4c" microarchitecture. Although with the same ISA as "Zen 4," the "Zen 4c" is essentially a low-power, lite version of the core, with significantly higher performance/Watt. The core is physically smaller than a regular "Zen 4" core, which allows AMD to create CCDs (CPU core dies) with 16 cores, compared to the current "Zen 4" CCD with 8.

The 16-core "Zen 4c" CCD is built on the same 5 nm EUV foundry node as the 8-core "Zen 4" CCD, and internally features two CCX (CPU core complex), each with 8 "Zen 4c" cores. Each of the two CCX shares a 16 MB L3 cache among the cores. The SemiAnalysis report states that the dedicated L2 cache size of the "Zen 4c" core remains at 1 MB, just like that of the regular "Zen 4." Perhaps the biggest finding is their die-size estimation, which puts the 16-core "Zen 4c" CCD just 9.6% larger in die-area, than the 8-core "Zen 4" CCD. That's 72.7 mm² per CCD, compared to 66.3 mm² of the regular 8-core "Zen 4" CCD.

According to the latest leak, AMD's upcoming Phoenix accelerated processing units (APUs) could feature a hybrid design, featuring Performance and Efficiency cores. While there are no precise details, the latest AMD processor programming guide, leaked online, clearly marks these as two types of cores, most likely standard Zen 4 and energy-efficient Zen 4c cores.

These two set of cores will features a different feature set, and the latest document gives software designers guidelines. Such hybrid CPU design, similar to ARM's BIG.little architecture, will allow AMD to be more competitive with Intel's similar P- and E-core design, allowing it to achieve certain performance levels while also maintaining power efficiency.

Intel's upcoming LGA-7529 socket designed for next-generation Xeon processors has been pictured, thanks to Yuuki_Ans and Hassan Mujtaba. According to the latest photos, we see the massive LGA-7529 socket with an astonishing 7,529 pins placed inside of a single socket. Made for Intel's upcoming "Birch Stream" platform, this socket is going to power Intel's next-generation "Sierra Forest" Xeon processors. With Sierra Forest representing a new way of thinking about Xeon processors, it also requires a special socket. Built on Intel 3 manufacturing process, these Xeon processors use only E-cores in their design to respond to AMD EPYC Bergamo with Zen4c.

The Intel Xeon roadmap will split in 2024, where Sierra Forest will populate dense and efficient cloud computing with E-cores, while its Granite Rapids sibling will power high-performance computing using P-cores. This interesting split will be followed by the new LGA-7529 socket pictured below, which is a step up from Intel's current LGA-4677 socket with 4677 pins used for Sapphire Rapids. With higher core densities and performance targets, the additional pins are likely to be mostly power/ground pins, while the smaller portion is picking up the additional I/O of the processor.20:20 UTC: Updated with motherboard picture of dual-socket LGA-7529 system, thanks to findings of @9550pro lurking in the Chinese forums.

Intel's server processor lineup led by the 4th Gen Xeon Scalable "Sapphire Rapids" processors face stiff competition from AMD 4th Gen EPYC "Genoa" processors that offer significantly higher multi-threaded performance per Watt on account of a higher CPU core-count. The gap is only set to widen, as AMD prepares to launch the "Bergamo" processor for cloud data-centers, with core-counts of up to 128-core/256-thread per socket. A technologically-embattled Intel is preparing quick counters as many as three new server microarchitecture launches over the next 23 months, according to Intel, in its Q4-2022 Financial Results presentation.

The 4th Gen Xeon Scalable "Sapphire Rapids," with a core-count of up to 60-core/120-thread, and various application-specific accelerators, witnessed a quiet launch earlier this month, and is shipping to Intel customers. The company says that it will be joined by the Xeon Scalable "Emerald Rapids" architecture in the second half of 2023; followed by "Granite Rapids" and "Sierra Forest" in 2024. Built on the same LGA4677 package as "Sapphire Rapids," the new "Emerald Rapids" MCM packs up to 64 "Raptor Cove" CPU cores, which support higher clock-speeds, higher memory speeds, and introduce the new Intel Trust Domain Extensions (TDX) instruction-set. The processor retains the 8-channel DDR5 memory interface, but with higher native memory speeds. The chip's main serial interface is a PCI-Express Gen 5 root-complex with 80 lanes. The processor will be built on the last foundry-level refinement of the Intel 7 node (10 nm Enhanced SuperFin); many of these refinements were introduced with the company's 13th Gen Core "Raptor Lake" client processors.

With its recent announcement of the Ryzen 7000 desktop processors, the action now shifts to the server, with AMD preparing a wide launch of its EPYC "Genoa" and "Bergamo" processors this year. Powered by the "Zen 4" microarchitecture, and contemporary I/O that includes PCI-Express Gen 5, CXL, and DDR5, these processors dial the CPU core-counts per socket up to 96 in case of "Genoa," and up to 128 in case of "Bergamo." The EPYC "Genoa" series represents the main trunk of the company's server processor lineup, with various internal configurations targeting specific use-cases.

The 96 cores are spread twelve 5 nm 8-core CCDs, each with a high-bandwidth Infinity Fabric path to the sIOD (server I/O die), which is very likely built on the 6 nm node. Lower core-count models can be built either by lowering the CCD count (ensuring more cores/CCD), or by reducing the number of cores/CCD and keeping the CCD-count constant, to yield more bandwidth/core. The leaked product-stack table below shows several of these sub-classes of "Genoa" and "Bergamo," classified by use-cases. The leaked slide also details the nomenclature AMD is using with its new processors. The leaked roadmap also mentions the upcoming "Genoa-X" processor for HPC and cloud-compute uses, which features the 3D Vertical Cache technology.

AMD in its recent interview with TechPowerUp had asserted that 3D Vertical Cache (or 3DV Cache), isn't a one-off technology and that it would be a continual part of its roadmap. In its 2022 Financial Analyst Day presentation, the company confirmed this, by announcing variants of its CPU chiplets that have 3DV Cache, extending to both the upcoming "Zen 4" microarchitecture, and the upcoming "Zen 5," which it unveiled today.

EPYC "Genoa" is codename for the upcoming line of server processors based on the "Zen 4" CPU microarchitecture, with CPU core-counts of up to 96-core/192-thread. These feature the standard "Zen 4" CCD. The company hasn't yet announced the last-level cache (L3 cache) size of the standard "Zen 4" CCD. The company will launch the EPYC "Genoa-X" processor, which much like the EPYC "Milan-X," will incorporate 3DV Cache, with a stacked L3 cache die on top of the chiplet. "Genoa-X" is slated for a 2023 debut.

AMD is launching two distinct classes of next-generation enterprise processors, the 4th Generation EPYC "Genoa" with CPU core-counts up to 96-core/192-thread; and the new EPYC "Bergamo" with a massive 128-core/256-thread compute density. Pictures of the "Genoa" MCM are already out in the wild, revealing twelve "Zen 4" CCDs built on 5 nm, and a new-generation sIOD (I/O die) that's very likely built on 6 nm. The fiberglass substrate of "Genoa" already looks crowded with twelve chiplets, making us wonder if AMD needed a larger package for "Bergamo." Turns out, it doesn't.

In its latest Corporate presentation, AMD reiterated that "Bergamo" will be based on the same SP5 (LGA-6096) package as "Genoa." This would mean that the company either made room for more CCDs, or the CCDs themselves are larger in size. AMD states that "Bergamo" CCDs are based on the "Zen 4c" microarchitecture. Details about "Zen 4c" are scarce, but from what we gather, it is a cloud-optimized variant of "Zen 4" probably with the entire ISA of "Zen 4," and power characteristics suited for high-density cloud environments. These chiplets are built on the same TSMC N5 (5 nm EUV) process as the regular "Zen 4" CCDs.

Here's the first picture of AMD Socket SP5, the huge new CPU socket the company is building its next-generation EPYC "Genoa" enterprise processors around. "Genoa" will be AMD's first server products to implement the new "Zen 4" CPU cores, and next-gen I/O, including DDR5 memory and PCI-Express Gen 5. SP5, much like its predecessor SP3, is a land-grid array (LGA) socket, and has 6,096 pins.

The vast pin-count enables power to support CPU core-counts of up to 96 on the EPYC "Genoa," and up to 128 on the EPYC "Bergamo" cloud processor; a 12-channel DDR5 memory interface (24 sub-channels); and up to 128 PCI-Express 5.0 lanes. The socket's retention mechanism and processor installation procedure appears similar to that of the SP3, although the thermal requirements of SP5 will be entirely new, with processors expected to ship with TDP as high as 400 W, compared to 280 W on the current-generation EPYC "Milan." AMD is expected to debut EPYC "Genoa" in the second half of 2022.