Zen (first generation)

Last updated
AMD Zen
AMD ZEN.png
The logo for the Zen microarchitecture is a closed ensō
General information
LaunchedMarch 2, 2017;7 years ago (March 2, 2017) [1]
Designed by AMD
Common manufacturer
CPUID codeFamily 17h
Cache
L1 cache 64 KB instruction, 32 KB data per core
L2 cache512 KB per core
L3 cache8 MB per CCX (APU: 4 MB)
Architecture and classification
Technology node 14 nm (FinFET) [2]
Instruction set AMD64 (x86-64)
Physical specifications
Transistors
  • 4.8 billion per 8-core "Zeppelin" die [3]
Cores
    • 2–4 (essential)
    • 4–8 (mainstream)
    • 8–16 (enthusiast) [4] [5] [6] [7]
    • Up to 32 (server) [4] [8]
Sockets
Products, models, variants
Product code names
  • Summit Ridge (Desktop)
  • Whitehaven (HEDT)
  • Raven Ridge (APU/Embedded)
  • Naples (Server CPU)
  • Snowy Owl (Server APU) [10]
Brand names
History
Predecessor Excavator (4th gen)
Successor Zen+
Support status
Supported

Zen is the first iteration in the Zen family of computer processor microarchitectures from AMD. It was first used with their Ryzen series of CPUs in February 2017. [4] The first Zen-based preview system was demonstrated at E3 2016, and first substantially detailed at an event hosted a block away from the Intel Developer Forum 2016. The first Zen-based CPUs, codenamed "Summit Ridge", reached the market in early March 2017, Zen-derived Epyc server processors launched in June 2017 [11] and Zen-based APUs arrived in November 2017. [12]

Contents

Zen is a clean sheet design that differs from AMD's previous long-standing Bulldozer architecture. Zen-based processors use a 14 nm FinFET process, are reportedly more energy efficient, and can execute significantly more instructions per cycle. SMT has been introduced, allowing each core to run two threads. The cache system has also been redesigned, making the L1 cache write-back. Zen processors use three different sockets: desktop Ryzen chips use the AM4 socket, bringing DDR4 support; the high-end desktop Zen-based Threadripper chips support quad-channel DDR4 memory and offer 64 PCIe 3.0 lanes (vs 24 lanes), using the TR4 socket; [13] [14] and Epyc server processors offer 128 PCIe 3.0 lanes and octa-channel DDR4 using the SP3 socket.

Zen is based on a SoC design. [15] The memory controller and the PCIe, SATA, and USB controllers are incorporated into the same chip(s) as the processor cores. This has advantages in bandwidth and power, at the expense of chip complexity and die area. [16] This SoC design allows the Zen microarchitecture to scale from laptops and small-form factor mini PCs to high-end desktops and servers.

By 2020, 260 million Zen cores have already been shipped by AMD. [17]

Design

A highly simplified illustration of the Zen microarchitecture: a core has a total of 512 KB of L2 cache. Zen microarchitecture.svg
A highly simplified illustration of the Zen microarchitecture: a core has a total of 512 KB of L2 cache.
Ryzen 3 1200 die shot AMD@14nm@Zen(Zeppelin)@Summit Ridge@Ryzen 3 1200@YD1200BBM4KAE UA 1724PGT 9GW9105S70241 DSCx3 bottom layer microscope stitched@5x (35620962953).jpg
Ryzen 3 1200 die shot
Photomontage of a delidded Zen CPU with an etched die AMD@14nm@Zen(Zeppelin)@Summit Ridge@Ryzen 3 1200@YD1200BBM4KAE UA 1724PGT 9GW9105S70241 DSC01421 (36260250762).jpg
Photomontage of a delidded Zen CPU with an etched die
A delidded AMD EPYC 7001 processor used in servers. The four dies are similar to the ones used in mainstream processors. All EPYC processors contain four dies to provide structural support to the IHS (Integrated Heat Spreader). AMD EPYC die.jpg
A delidded AMD EPYC 7001 processor used in servers. The four dies are similar to the ones used in mainstream processors. All EPYC processors contain four dies to provide structural support to the IHS (Integrated Heat Spreader).
A delidded AMD Athlon 3000G APU, based on the Zen architecture. The die is physically smaller than those on mainstream Zen processors. AMD@14nm@Zen@Dali@Athlon 3000G@YD3000C6M20FH A0 2002PGT DSCx2@IR.jpg
A delidded AMD Athlon 3000G APU, based on the Zen architecture. The die is physically smaller than those on mainstream Zen processors.
Die shot of an AMD Athlon 3000G AMD@14nm@Zen@Dali@Athlon 3000G@YD3000C6M20FH A0 2002PGT DSCx6 poly@5xexternallight.jpg
Die shot of an AMD Athlon 3000G

According to AMD, the main focus of Zen is on increasing per-core performance. [21] [22] [23]

New or improved features include: [24]

This is the first time in a very long time that we engineers have been given the total freedom to build a processor from scratch and do the best we can do. It is a multi-year project with a really large team. It's like a marathon effort with some sprints in the middle. The team is working very hard, but they can see the finish line. I guarantee that it will deliver a huge improvement in performance and power consumption over the previous generation.

— Suzanne Plummer, Zen team leader, on September 19th, 2015. [38]

The Zen architecture is built on a 14 nanometer FinFET process subcontracted to GlobalFoundries, [39] which in turn licenses its 14 nm process from Samsung Electronics. [40] This gives greater efficiency than the 32 nm and 28 nm processes of previous AMD FX CPUs and AMD APUs, respectively. [41] The "Summit Ridge" Zen family of CPUs use the AM4 socket and feature DDR4 support and a 95 W TDP (thermal design power). [41] While newer roadmaps don't confirm the TDP for desktop products, they suggest a range for low-power mobile products with up to two Zen cores from 5 to 15 W and 15 to 35 W for performance-oriented mobile products with up to four Zen cores. [42]

Each Zen core can decode four instructions per clock cycle and includes a micro-op cache which feeds two schedulers, one each for the integer and floating point segments. [43] [44] Each core has two address generation units, four integer units, and four floating point units. Two of the floating point units are adders, and two are multiply-adders. However, using multiply-add-operations may prevent simultaneous add operation in one of the adder units. [45] There are also improvements in the branch predictor. The L1 cache size is 64 KB for instructions per core and 32 KB for data per core. The L2 cache size 512 KB per core, and the L3 is 1–2 MB per core. L3 caches offer 5× the bandwidth of previous AMD designs.

History and development

AMD began planning the Zen microarchitecture shortly after re-hiring Jim Keller in August 2012. [46] AMD formally revealed Zen in 2015.

The team in charge of Zen was led by Keller (who left in September 2015 after a 3-year tenure) and Zen Team Leader Suzanne Plummer. [47] [48] The Chief Architect of Zen was AMD Senior Fellow Michael Clark. [49] [50] [51]

Zen was originally planned for 2017 following the ARM64-based K12 sister core, but on AMD's 2015 Financial Analyst Day it was revealed that K12 was delayed in favor of the Zen design, to allow it to enter the market within the 2016 timeframe, [9] with the release of the first Zen-based processors expected for October 2016. [52]

In November 2015, a source inside AMD reported that Zen microprocessors had been tested and "met all expectations" with "no significant bottlenecks found". [2] [53]

In December 2015, it was rumored that Samsung may have been contracted as a fabricator for AMD's 14 nm FinFET processors, including both Zen and AMD's then-upcoming Polaris GPU architecture. [54] This was clarified by AMD's July 2016 announcement that products had been successfully produced on Samsung's 14 nm FinFET process. [55] AMD stated Samsung would be used "if needed", arguing this would reduce risk for AMD by decreasing dependence on any one foundry.

In December 2019, AMD started putting out first generation Ryzen products built using the second generation Zen+ architecture. [56]

Advantages over predecessors

Manufacturing process

Processors based on Zen use 14 nm FinFET silicon. [57] These processors are reportedly produced at GlobalFoundries. [58] Prior to Zen, AMD's smallest process size was 28 nm, as utilized by their Steamroller and Excavator microarchitectures. [59] [60] The immediate competition, Intel's Skylake and Kaby Lake microarchitecture, are also fabricated on 14 nm FinFET; [61] though Intel planned to begin the release of 10 nm parts later in 2017. [62] Intel was unable to reach this goal, and in 2021, only mobile chips have been produced with the 10nm process. In comparison to Intel's 14 nm FinFET, AMD claimed in February 2017 the Zen cores would be 10% smaller. [63] Intel has later announced in July 2018 that 10nm mainstream processors should not be expected before the second half of 2019. [64]

For identical designs, these die shrinks would use less current (and power) at the same frequency (or voltage). As CPUs are usually power limited (typically up to ~125 W, or ~45 W for mobile), smaller transistors allow for either lower power at the same frequency, or higher frequency at the same power. [65]

Performance

One of Zen's major goals in 2016 was to focus on performance per-core, and it was targeting a 40% improvement in instructions per cycle (IPC) over its predecessor. [66] Excavator, in comparison, offered 4–15% improvement over previous architectures. [67] [68] AMD announced the final Zen microarchitecture actually achieved 52% improvement in IPC over Excavator. [69] The inclusion of SMT also allows each core to process up to two threads, increasing processing throughput by better use of available resources.

The Zen processors also employ sensors across the chip to dynamically scale frequency and voltage. [70] This allows for the maximum frequency to be dynamically and automatically defined by the processor itself based upon available cooling.

AMD has demonstrated an 8-core/16-thread Zen processor outperforming an equally-clocked Intel Broadwell-E processor in Blender rendering [4] [10] and HandBrake benchmarks. [70]

Zen supports AVX2 but it requires two clock cycles to complete each AVX2 instruction compared to Intel's one. [71] [72] This difference was corrected in Zen 2.

Memory

Zen supports DDR4 memory (up to eight channels) [73] and ECC. [74]

Pre-release reports stated APUs using the Zen architecture would also support High Bandwidth Memory (HBM). [75] However, the first demonstrated APU did not use HBM. [76] Previous APUs from AMD relied on shared memory for both the GPU and the CPU.

Power consumption and heat output

Processors built at the 14 nm node on FinFET silicon should show reduced power consumption and therefore heat over their 28 nm and 32 nm non-FinFET predecessors (for equivalent designs), or be more computationally powerful at equivalent heat output/power consumption.

Zen also uses clock gating, [44] reducing the frequency of underutilized portions of the core to save power. This comes from AMD's SenseMI technology, using sensors across the chip to dynamically scale frequency and voltage. [70]

Enhanced security and virtualization support

Zen added support for AMD's Secure Memory Encryption (SME) and AMD's Secure Encrypted Virtualization (SEV). Secure Memory Encryption is real-time memory encryption done per page table entry. Encryption occurs on a hardware AES engine and keys are managed by the onboard "Security" Processor (ARM Cortex-A5) at boot time to encrypt each page, allowing any DDR4 memory (including non-volatile varieties) to be encrypted. AMD SME also makes the contents of the memory more resistant to memory snooping and cold boot attacks. [77] [78]

SME can be used to mark individual pages of memory as encrypted through the page tables. A page of memory that is marked encrypted will be automatically decrypted when read from DRAM and will be automatically encrypted when written to DRAM. The SME feature is identified through a CPUID function and enabled through the SYSCFG MSR. Once enabled, page table entries will determine how the memory is accessed. If a page table entry has the memory encryption mask set, then that memory will be accessed as encrypted memory. The memory encryption mask (as well as other related information) is determined from settings returned through the same CPUID function that identifies the presence of the feature. [79]

The Secure Encrypted Virtualization (SEV) feature allows the memory contents of a virtual machine (VM) to be transparently encrypted with a key unique to the guest VM. The memory controller contains a high-performance encryption engine which can be programmed with multiple keys for use by different VMs in the system. The programming and management of these keys is handled by the AMD Secure Processor firmware which exposes an API for these tasks. [80]

Connectivity

Incorporating much of the southbridge into the SoC, the Zen CPU includes SATA, USB, and PCI Express NVMe links. [81] [82] This can be augmented by available Socket AM4 chipsets which add connectivity options including additional SATA and USB connections, and support for AMD's Crossfire and Nvidia's SLI. [83]

AMD, in announcing its Radeon Instinct line, argued that the upcoming Zen-based Naples server CPU would be particularly suited for building deep learning systems. [84] [85] The 128 [86] PCIe lanes per Naples CPU allows for eight Instinct cards to connect at PCIe x16 to a single CPU. This compares favorably to the Intel Xeon line, with only 40[ citation needed ] PCIe lanes.

Features

CPUs

APUs

APU features table

Products

The Zen architecture is used in the current-generation desktop Ryzen CPUs. It is also in Epyc server processors (successor of Opteron processors), and APUs. [75] [ unreliable source ] [87] [88]

The first desktop processors without graphics processing units (codenamed "Summit Ridge") were initially expected to start selling at the end of 2016, according to an AMD roadmap; with the first mobile and desktop processors of the AMD Accelerated Processing Unit type (codenamed "Raven Ridge") following in late 2017. [89] AMD officially delayed Zen until Q1 of 2017. In August 2016, an early demonstration of the architecture showed an 8-core/16-thread engineering sample CPU at 3.0 GHz. [10]

In December 2016, AMD officially announced the desktop CPU line under the Ryzen brand for release in Q1 2017. It also confirmed Server processors would be released in Q2 2017, and mobile APUs in H2 2017. [90]

On March 2, 2017, AMD officially launched the first Zen architecture-based octacore Ryzen desktop CPUs. The final clock speeds and TDPs for the 3 CPUs released in Q1 of 2017 demonstrated significant performance-per-watt benefits over the previous K15h (Piledriver) architecture. [91] [92] The octacore Ryzen desktop CPUs demonstrated performance-per-watt comparable to Intel's Broadwell octacore CPUs. [93] [94]

In March 2017, AMD also demonstrated an engineering sample of a server CPU based on the Zen architecture. The CPU (codenamed "Naples") was configured as a dual-socket server platform with each CPU having 32 cores/64 threads. [4] [10]

Desktop processors

Common features of Ryzen 1000 desktop CPUs:

Branding and Model Cores
(threads)		 Clock rate (GHz) L3 cache
(total)		 TDP Core
config [lower-roman 1] 		Release
date		Launch
price [lower-alpha 1]
BasePBO
1–2
(≥3)		XFR [95]
1–2
Ryzen 7 1800X [96] 8 (16)3.64.0
(3.7)		4.116 MB95 W2 × 4March 2, 2017US $499
PRO 1700X 3.43.8
(3.5)		3.9June 29, 2017OEM
1700X [96] March 2, 2017US $399
PRO 1700 3.03.7
(3.2)		3.7565 WJune 29, 2017OEM
1700 [96] March 2, 2017US $329
Ryzen 5 1600X [97] 6 (12)3.64.0
(3.7)		4.195 W2 × 3April 11, 2017US $249
PRO 1600 3.23.6
(3.4)		3.765 WJune 29, 2017OEM
1600 [97] April 11, 2017US $219
1500X [97] 4 (8)3.53.7
(3.6)		3.92 × 2US $189
PRO 1500 June 29, 2017OEM
1400 [97] 3.23.4
(3.4)		3.458 MBApril 11, 2017US $169
Ryzen 3 1300X [98] 4 (4)3.53.7
(3.5)		3.9July 27, 2017US $129
PRO 1300 June 29, 2017OEM
PRO 1200 3.13.4
(3.1)		3.45
1200 [98] July 27, 2017US $109
  1. ↑ Core Complexes (CCX) × cores per CCX

Common features of Ryzen 1000 HEDT CPUs:

Branding and Model Cores
(threads)		 Clock rate (GHz) L3 cache
(total)		 TDP Chiplets Core
config [lower-roman 1] 		Release
date		Launch
price [lower-alpha 1]
BasePBO
1–4
(≥5)		XFR [95]
1–2
Ryzen
Threadripper		 1950X [99] 16 (32)3.44.0
(3.7)		4.232 MB180 W2 × CCD [lower-roman 2] 4 × 4August 10, 2017US $999
1920X [99] 12 (24)3.54 × 3US $799
1900X [99] 8 (16)3.84.0
(3.9)		16 MB2 × 4August 31, 2017US $549
  1. ↑ Core Complexes (CCX) × cores per CCX
  2. ↑ Processor package actually contains two additional inactive dies to provide structural support to the integrated heat spreader.
Ryzen 5 1600 CPU on a motherboard Ryzen 5 1600 CPU on a motherboard.jpg
Ryzen 5 1600 CPU on a motherboard
Threadripper 1950X TR4 in socket Threadripper 1950X in socket.JPG
Threadripper 1950X TR4 in socket

Desktop APUs

Ryzen APUs are identified by either the G or GE suffix in their name.

Die shot of an AMD 2200G APU AMD@14nm@Zen(Zeppelin)@Raven Ridge@Ryzen 3 2200G@YD2200C5M4MFB AN 1750SUT 9HA7534X70147 DSCx2 polysilicon microscope stitched@5x.jpg
Die shot of an AMD 2200G APU
ModelRelease date
& price		 Fab Thermal SolutionCPUGPU Socket PCIe lanes DDR4
memory
support 		TDP
(W)
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-roman 1] Clock
(GHz)		Processing
power
(GFLOPS) [lower-roman 2]
BaseBoost L1 L2 L3
Athlon 200GE [100] September 6, 2018
US $55		 GloFo
14LP 		AMD 65W thermal solution2 (4)3.2—64 KB inst.
32 KB data
per core		512 KB
per core		4 MBVega 3192:12:4
3 CU		1.0384AM416 (8+4+4)2667
dual-channel		35
Athlon Pro 200GE [101] September 6, 2018
OEM		OEM
Athlon 220GE [102] December 21, 2018
US $65		AMD 65W thermal solution3.4
Athlon 240GE [103] December 21, 2018
US $75		3.5
Athlon 3000G [104] November 19, 2019
US $49		1.1424.4
Athlon 300GE [105] July 7, 2019
OEM		OEM3.4
Athlon Silver 3050GE [106] July 21, 2020
OEM
Ryzen 3 Pro 2100GE [107] c. 2019

OEM

3.2??2933
dual-channel
Ryzen 3 2200GE [108] April 19, 2018
OEM		4 (4)3.23.6Vega 8512:32:16
8 CU		1126
Ryzen 3 Pro 2200GE [109] May 10, 2018
OEM
Ryzen 3 2200GFebruary 12, 2018
US $99		 Wraith Stealth 3.53.745–
65
Ryzen 3 Pro 2200G [110] May 10, 2018
OEM		OEM
Ryzen 5 2400GE [111] April 19, 2018
OEM		4 (8)3.23.8RX Vega 11704:44:16
11 CU		1.25176035
Ryzen 5 Pro 2400GE [112] May 10, 2018
OEM
Ryzen 5 2400G [113] February 12, 2018 [114] [115]
US $169		 Wraith Stealth 3.63.945–
65
Ryzen 5 Pro 2400G [116] May 10, 2018
OEM		OEM
  1. ↑ Unified Shaders  : Texture Mapping Units  : Render Output Units and Compute Units (CU)
  2. ↑ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Mobile APUs

ModelRelease
date		 Fab CPUGPU Socket PCIe
lanes		 Memory
support 		TDP
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-roman 1] Clock
(MHz)		Processing
power
(GFLOPS) [lower-roman 2]
BaseBoost L1 L2 L3
Athlon Pro 200U 2019 GloFo
14LP 		2 (4)2.33.264 KB inst.
32 KB data
per core		512 KB
per core		4 MBRadeon Vega 3192:12:4
3 CU		1000384FP512 (8+4)DDR4-2400
dual-channel 		12–25 W
Athlon 300U Jan 6, 20192.43.3
Ryzen 3 2200U Jan 8, 20182.53.41100422.4
Ryzen 3 3200U Jan 6, 20192.63.51200460.8
Ryzen 3 2300U Jan 8, 20184 (4)2.03.4Radeon Vega 6384:24:8
6 CU		1100844.8
Ryzen 3 Pro 2300U May 15, 2018
Ryzen 5 2500U Oct 26, 20174 (8)3.6Radeon Vega 8512:32:16
8 CU		1126.4
Ryzen 5 Pro 2500U May 15, 2018
Ryzen 5 2600H Sep 10, 20183.2DDR4-3200
dual-channel		35–54 W
Ryzen 7 2700U Oct 26, 20172.23.8Radeon RX Vega 10640:40:16
10 CU		13001664DDR4-2400
dual-channel		12–25 W
Ryzen 7 Pro 2700U May 15, 2018Radeon Vega 10
Ryzen 7 2800H Sep 10, 20183.3Radeon RX Vega 11704:44:16
11 CU		1830.4DDR4-3200
dual-channel		35–54 W
  1. ↑ Unified shaders  : Texture mapping units  : Render output units and Compute units (CU)
  2. ↑ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Ultra-mobile APUs

Dalí

ModelRelease
date		 Fab CPUGPU Socket PCIe
lanes		 Memory
support 		TDP Part number
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-alpha 1] Clock
(GHz)		Processing
power
(GFLOPS) [lower-alpha 2]
BaseBoost L1 L2 L3
AMD 3020e Jan 6, 202014 nm2 (2)1.22.664 KB inst.
32 KB data
per core		512 KB
per core		4 MBRadeon
Graphics
(Vega)		192:12:4
3 CU		1.0384FP512 (8+4)DDR4-2400
dual-channel 		6 WYM3020C7T2OFG
Athlon PRO 3045B Q1 20212.33.2128:8:4
2 CU		1.1281.615 WYM3045C4T2OFG
Athlon Silver 3050U Jan 6, 2020YM3050C4T2OFG
Athlon Silver 3050C Sep 22, 2020YM305CC4T2OFG
Athlon Silver 3050e Jan 6, 20202 (4)1.42.8192:12:4
3 CU [117] 		1.03846 WYM3050C7T2OFG
Athlon PRO 3145B Q1 20212.43.315 WYM3145C4T2OFG
Athlon Gold 3150U Jan 6, 2020YM3150C4T2OFG
Athlon Gold 3150C Sep 22, 2020YM315CC4T2OFG
Ryzen 3 3250U Jan 6, 20202.63.51.2460.8YM3250C4T2OFG
Ryzen 3 3250C Sep 22, 2020YM325CC4T2OFG
  1. ↑ Unified shaders  : Texture mapping units  : Render output units and Compute units (CU)
  2. ↑ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Pollock

ModelRelease
date		 Fab CPUGPU Socket PCIe
lanes		 Memory
support 		TDP Part number
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-alpha 1] Clock
(GHz)		Processing
power
(GFLOPS) [lower-alpha 2]
BaseBoost L1 L2 L3
AMD 3015e Jul 6, 202014 nm2 (4)1.22.364 KB inst.
32 KB data
per core		512 KB
per core		4 MBRadeon
Graphics
(Vega)		192:12:4
3 CU		0.6230.4FT512 (8+4)DDR4-1600
single-channel		6 WAM3015BRP2OFJ
AMD 3015Ce Apr 29, 2021AM301CBRP2OFJ
  1. ↑ Unified shaders  : Texture mapping units  : Render output units and Compute units (CU)
  2. ↑ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Embedded processors

V1000

In February 2018, AMD announced the V1000 series of embedded Zen+Vega APUs with four SKUs. [118]

ModelRelease
date		 Fab CPUGPU Memory
support 		TDP Junction
temp.
range
(°C)
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-roman 1] Clock
(GHz)		Processing
power
(GFLOPS) [lower-roman 2]
BaseBoost L1 L2 L3
V1202B February 2018 GloFo
14LP 		2 (4)2.33.264 KB inst.
32 KB data
per core		512 KB
per core		4 MBVega 3192:12:16
3 CU		1.0384DDR4-2400
dual-channel 		12–25 W0–105
V1404I December 20184 (8)2.03.6Vega 8512:32:16
8 CU		1.11126.4-40–105
V1500B 2.2——0–105
V1605B February 20182.03.6Vega 8512:32:16
8 CU		1.11126.4
V1756B 3.25DDR4-3200
dual-channel		35–54 W
V1780B December 20183.35—
V1807B February 20183.8Vega 11704:44:16
11 CU		1.31830.4
  1. ↑ Unified Shaders  : Texture Mapping Units  : Render Output Units and Compute Units (CU)
  2. ↑ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

R1000

In 2019, AMD announced the R1000 series of embedded Zen+Vega APUs.

ModelRelease
date		 Fab CPUGPU Memory
support 		TDP
Cores
(threads)		 Clock rate (GHz) Cache ModelConfig [lower-roman 1] Clock
(GHz)		Processing
power
(GFLOPS) [lower-roman 2]
BaseBoost L1 L2 L3
R1102G February 25, 2020 GloFo
14LP		2 (2)1.22.664 KB inst.
32 KB data
per core		512 KB
per core		4 MBVega 3192:12:4
3 CU		1.0384DDR4-2400
single-channel		6 W
R1305G 2 (4)1.52.8DDR4-2400
dual-channel 		8-10 W
R1505G April 16, 20192.43.312–25 W
R1606G 2.63.51.2460.8
  1. ↑ Unified Shaders  : Texture Mapping Units  : Render Output Units and Compute Units (CU)
  2. ↑ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Server processors

Epyc EpycProcessor.jpg
Epyc

AMD announced in March 2017 that it would release a server platform based on Zen, codenamed Naples, in the second quarter of the year. The platform include 1- and 2-socket systems. The CPUs in multi-processor configurations communicate via AMD's Infinity Fabric. [119] Each chip supports eight channels of memory and 128 PCIe 3.0 lanes, of which 64 lanes are used for CPU-to-CPU communication through Infinity Fabric when installed in a dual-processor configuration. [120] AMD officially revealed Naples under the brand name Epyc in May 2017. [121]

On June 20, 2017, AMD officially released the Epyc 7000 series CPUs at a launch event in Austin, Texas. [122] Common features of EPYC 7001 series CPUs:

Model [lower-roman 1] Cores
(threads)		 Clock rate (GHz) L3 cache
(total)		 TDP Chiplets Core
config [lower-roman 2] 		Release Embedded
options [lower-roman 3]
BaseBoostDatePrice
(USD)
All–coreMax
7251 [123] [124] 8 (16)2.12.92.932 MB120 W4 × CCD8 × 1Jun 2017 [125] $475 Yes
7261 [123] [126] 2.564 MB155/170 WJun 2018 [127] $570 Yes
7281 [123] [124] 16 (32)2.12.72.732 MB8 × 2Jun 2017 [125] $650 Yes
7301 [123] [124] 2.264 MB$800 Yes
7351P [123] [124] 2.42.92.9$750 735P
7351 [123] [124] $1,100 Yes
7371 [123] [128] 3.13.63.8200 WNov 2018 [129] $1,550 Yes
7401P [123] [124] 24 (48)2.02.83.0155/170 W8 × 3Jun 2017 [125] $1,075 740P
7401 [123] [124] $1,850 Yes
7451 [123] [124] 2.32.93.2180 W$2,400 Yes
7501 [123] [124] 32 (64)2.02.63.0155/170 W8 × 4$3,400 Yes
7551P [123] [124] 2.55180 W$2,100 755P
7551 [123] [124] $3,400 Yes
7571 [130] [131] 2.23.0200 WNov 2018OEM/AWS Un­known
7601 [123] [124] 2.73.2180 WJun 2017 [125] $4,200 Yes
  1. ↑ Models with "P" suffixes are uniprocessors, only available as single socket configuration.
  2. ↑ Core Complexes (CCX) × cores per CCX
  3. ↑ Epyc embedded 7001 series models have identical specifications as Epyc 7001 series.

Embedded server processors

In February 2018, AMD also announced the EPYC 3000 series of embedded Zen CPUs. [132] Common features of EPYC Embedded 3000 series CPUs:

Model Cores
(threads)		 Clock rate (GHz) L3 cache
(total)		 TDP Chiplets Core
config [lower-roman 1] 		Release
date
BaseBoost
All-coreMax
3101 [133] 4 (4)2.12.92.98 MB35 W1 x CCD1 × 4Feb 2018
3151 [133] 4 (8)2.716 MB45 W2 × 2
3201 [133] 8 (8)1.53.13.130 W2 × 4
3251 [133] 8 (16)2.555 W
3255 [134] 25–55 WDec 2018
3301 [133] 12 (12)2.02.153.032 MB65 W2 x CCD4 × 3Feb 2018
3351 [133] 12 (24)1.92.7560–80 W
3401 [133] 16 (16)1.852.2585 W4 × 4
3451 [133] 16 (32)2.152.4580–100 W
  1. ↑ Core Complexes (CCX) × cores per CCX

See also

Related Research Articles

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