Zen 3

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AMD Zen 3
Zen-3-logo.jpg
General information
LaunchedNovember 5, 2020; 10 months ago (November 5, 2020)[1]
Designed byAMD
Common manufacturer(s)
Cache
L1 cache64 KB per core[2]
L2 cache512 KB per core[2]
Architecture and classification
Min. feature sizeTSMC 7 nm
Physical specifications
Cores
  • 4 to 16 (desktop)
Package(s)
Socket(s)
Products, models, variants
Product code name(s)
  • Vermeer (desktop)
    Cézanne (mobile)
    Milan (server)
History
PredecessorZen 2
SuccessorZen 4

Zen 3 is the codename for a CPU microarchitecture by AMD, released on November 5, 2020.[1][4] It is the successor to Zen 2 and uses TSMC's 7 nm process for the chiplets and GlobalFoundries's 14 nm process for the I/O die (as it did with the Ryzen 3000XT processors).[6] Zen 3 powers Ryzen 5000 mainstream desktop processors (codenamed "Vermeer") and Epyc server processors (codenamed "Milan").[7][5] Zen 3 is supported on motherboards with 500 series chipsets; 400 series boards will also see support on select B450 / X470 motherboards with certain beta BIOSes.[8] Zen 3 is expected to be the last microarchitecture before AMD switches to DDR5 memory and new sockets.[4] According to AMD, Zen 3 has a 19% higher instructions per cycle (IPC) on average than Zen 2.

Features[edit]

Zen 3 is a significant incremental improvement over its predecessors, with an IPC increase of 19%,[9] and being capable of reaching higher clock speeds.

Like Zen 2, Zen 3 is composed of up to 2 core complex dies (CCD) along with a separate IO die containing the I/O components. A Zen 3 CCD is composed of a single core complex (CCX) containing 8 CPU cores and 32 MB of shared L3 cache, this is in contrast to Zen 2 where each CCD is composed of 2 CCX, each containing 4 cores each as well as 16 MB of L3 cache. The new configuration allows all 8 cores of the CCX to directly communicate with each other and the L3 Cache instead of having to use the IO die through the Infinity Fabric.[9]

Zen 3 (along with AMD's RDNA2 GPUs) were also the first implementation of Resizable BAR, an optional feature introduced in PCIe 2.0, that was branded as Smart Access Memory (SAM). This technology allows CPU to directly access all of compatible video card's VRAM.[10] Intel and Nvidia have since implemented this feature as well.[11]

In Zen 3, a single 32MB L3 cache pool is shared among all 8 cores in a chiplet, vs Zen 2's two 16MB pools each shared among 4 cores in a core complex, of which there were two per chiplet. This new arrangement improves the cache hit rate as well as performance in situations that require cache data to be exchanged among cores, but increases cache latency from 39 cycles in Zen 2 to 46 clock cycles and halves per-core cache bandwidth, although both problems are partially mitigated by higher clock speeds. Total cache bandwidth on all 8 cores combined remains the same due to power consumption concerns. L2 cache capacity and latency remain the same at 512KB and 12 cycles. All cache read and write operations are done at 32 bytes per cycle.[2]

Improvements[edit]

Zen 3 has made the following improvements over Zen 2:[2][12]

  • An increase of 19% in instructions per clock
  • The base core chiplet has a single eight-core complex (versus two four-core complexes in Zen 2)
  • A unified 32MB L3 cache pool equally available to all 8 cores in a chiplet, vs Zen 2's two 16MB pools each shared among 4 cores in a core complex.
    • On mobile: A unified 16MB L3
  • A unified 8-core CCX (from 2x 4-Core CCX per CCD)
  • Increased branch prediction bandwidth. L1 branch target buffer size increased to 1024 entries (vs 512 in Zen 2)
  • New Instructions
    • VAES - 256-bit Vector AES instructions
    • INVLPGB - Broadcast TLB flushing
    • CET_SS - Control-flow Enforcement Technology / Shadow Stack
  • Improved integer units
    • 96 entry integer scheduler (up from 92)
    • 192 entry physical register file (up from 180)
    • 10 issue per cycle (up from 7)
    • 256 entry reorder-buffer (up from 224)
    • fewer cycles for DIV/IDIV ops (10...20 from 16...46)
  • Improved floating point units
    • 6 µOP dispatch width (up from 4)
    • 4 cycles for fused-multiply-add-ops (down from 5)
    • FMA latency reduced by 1 cycle (down from 5 to 4

Feature tables[edit]

CPUs[edit]

CPU features table

APUs[edit]

APU features table

Products[edit]

AMD Ryzen 7 5800X

On October 8, 2020, AMD announced four Zen 3-based desktop Ryzen processors, consisting of one Ryzen 5, one Ryzen 7, and two Ryzen 9 CPUs and featuring between 6 and 16 cores.[1]

Desktop CPUs[edit]

Vermeer[edit]

Model Release date
and price
Fab Chiplets Cores
(threads)
Core config[i] Clock rate (GHz) Cache Socket PCIe
lanes
Memory
support
TDP
Base Boost L1 L2 L3
Mainstream
Ryzen 5 5600X[13] November 5, 2020
US $299
TSMC
7FF
1 × CCD
1 × I/O
6 (12) 1 × 6 3.7 4.6 32 KB data
32 KB inst.
per core
512 KB
per core
32 MB
AM4 24 DDR4-3200
dual-channel
65 W
Performance
Ryzen 7 5800[14] January 12, 2021
OEM
TSMC
7FF
1 × CCD
1 × I/O
8 (16) 1 × 8 3.4 4.6 32 KB data
32 KB inst.
per core
512 KB
per core
32 MB
AM4 24 DDR4-3200
dual-channel
65 W
Ryzen 7 5800X[15] November 5, 2020
US $449
3.8 4.7 105 W
Enthusiast
Ryzen 9 5900[16] January 12, 2021
OEM
TSMC
7FF
2 × CCD
1 × I/O
12 (24) 2 × 6 3.0 4.7 32 KB data
32 KB inst.
per core
512 KB
per core
32 MB
per CCD
AM4 24 DDR4-3200
dual-channel
65 W
Ryzen 9 5900X[17] November 5, 2020
US $549
3.7 4.8 105 W
Ryzen 9 5950X[18] November 5, 2020
US $799
16 (32) 2 × 8 3.4 4.9
  1. ^ Core Complexes (CCX) × cores per CCX.


Desktop APUs[edit]

Cezanne[edit]

Model Release date and price Fab CPU GPU Socket PCIe
lanes
Memory support TDP
Cores
(threads)
Core config[i] Clock rate (GHz) Cache Model Config[ii] Clock Processing
power
(GFLOPS)[iii]
OEM Retail Base Boost L1 L2 L3
Ryzen 3 5300GE[19] 13 April 2021[20] TSMC
7FF
4 (8) 1 × 4 3.6 4.2 32 KB inst.
32 KB data
per core
512 KB
per core
8 MB AMD Radeon Graphics 384:24:8
6 CU
1700 MHz 1305.6 AM4 24 (16+4+4)[20] DDR4-3200
dual-channel
35 W
Ryzen 3 PRO 5350GE[21] 1 June 2021[22]
Ryzen 3 5300G[23] 13 April 2021[20] 4.0 65 W
Ryzen 3 PRO 5350G[24] 1 June 2021[22]
Ryzen 5 5600GE[25] 13 April 2021[20] 6 (12) 1 × 6 3.4 4.4 16 MB 448:28:8
7 CU
1900 MHz 1702.4 35 W
Ryzen 5 PRO 5650GE[26] 1 June 2021[22]
Ryzen 5 5600G[27] 13 April 2021[20] 5 August 2021
US $259[28]
3.9 65 W
Ryzen 5 PRO 5650G[29] 1 June 2021[22]
Ryzen 7 5700GE[30] 13 April 2021[20] 8 (16) 1 × 8 3.2 4.6 512:32:8
8 CU
2000 MHz 2048 35 W
Ryzen 7 PRO 5750GE[31] 1 June 2021[22]
Ryzen 7 5700G[32] 13 April 2021[20] 5 August 2021
US $359[28]
3.8 65 W
Ryzen 7 PRO 5750G[33] 1 June 2021[22]
  1. ^ Core Complexes (CCX) × cores per CCX
  2. ^ Unified shaders : texture mapping units : render output units and compute units (CU)
  3. ^ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.


Mobile APUs[edit]

Cezanne[edit]

Model Release
date
SOC CPU GPU Socket PCIe
lanes
Memory support TDP
Fab Transistors

(million)

Die Size

(mm²)

Cores
(threads)
Core config[i] Clock rate (GHz) Cache Model,
config[ii]
Clock Processing
power
(GFLOPS)[iii]
Base Boost L1 L2 L3
Ryzen 3 5400U[34][35] January 12, 2021 TSMC
7FF
4 (8) 1 × 4 2.6 4.0 32 KB inst.
32 KB data
per core
512 KB
per core
8 MB AMD Radeon Graphics
6 CU
1600 MHz 1228.8 FP6 16 (8+4+4)
PCIe 3.0
DDR4-3200 64GB
LPDDR4-4266 32GB
dual-channel
10–25 W
Ryzen 3 PRO 5450U[36] March 16, 2021
Ryzen 5 5600U[37] January 12, 2021 6 (12) 1 × 6 2.3 4.2 16 MB AMD Radeon Graphics
7 CU
1800 MHz 1612.8
Ryzen 5 PRO 5650U[38] March 16, 2021
Ryzen 5 5600H[39][40] January 12, 2021 3.3 35–54 W
Ryzen 5 5600HS[41] 3.0
Ryzen 7 5800U[42] 10,700 180 8 (16) 1 × 8 1.9 4.4 AMD Radeon Graphics
8 CU
2000 MHz 2048 10–25 W
Ryzen 7 PRO 5850U[43] March 16, 2021
Ryzen 7 5800H[44][45] January 12, 2021 3.2 35–54 W
Ryzen 7 5800HS[46] 2.8
Ryzen 9 5900HS[47] 3.0 4.6 2100 MHz 2150.4
Ryzen 9 5900HX[48] 3.3
Ryzen 9 5980HS[49] 3.0 4.8
Ryzen 9 5980HX[50] 3.3
  1. ^ Core Complexes (CCX) × cores per CCX.
  2. ^ Unified shaders : texture mapping units : render output units and compute units (CU)
  3. ^ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.


Epyc microprocessors[edit]

The Epyc server line of chips based on Zen 3 is named Milan and is the final generation of chips using the SP3 socket.[5] Epyc Milan was released on March 15, 2021.[51]


Model Price Fab Chiplets Cores
(threads)
Core config[i] Clock rate (GHz) Cache Socket &
configuration
TDP
Base Boost L1 L2 L3
EPYC 7763 US $7890 7 nm 8 × CCD
1 × I/O
64 (128) 8 × 8 2.45 3.50 32 KB inst.
32 KB data
per core
512 KB
per core
256 MB
32 MB per CCX
SP3
2P
280 W
EPYC 7713 US $7060 2.00 3.675 225 W
EPYC 7713P US $5010 SP3
1P
EPYC 7663 US $6366 56 (112) 8 x 7 2.00 3.50 SP3
2P
240 W
EPYC 7643 US $4995 48 (96) 8 x 6 2.30 3.60 225 W
EPYC 75F3 US $4860 32 (64) 8 x 4 2.95 4.00 280 W
EPYC 7543 US $3761 2.80 3.70 225 W
EPYC 7543P US $2730 SP3
1P
EPYC 7513 US $2840 2.60 3.65 128 MB
16 MB per CCX
SP3
2P
200 W
EPYC 7453 US $1570 4 × CCD
1 × I/O
28 (56) 4 x 7 2.75 3.45 64 MB
16 MB per CCX
225 W
EPYC 74F3 US $2900 8 × CCD
1 × I/O
24 (48) 8 x 3 3.20 4.00 256 MB
32 MB per CCX
240 W
EPYC 7443 US $2010 4 × CCD
1 × I/O
4 x 6 2.85 4.00 128 MB
32 MB per CCX
200 W
EPYC 7443P US $1337 SP3
1P
EPYC 7413 US $1825 2.65 3.60 SP3
2P
180 W
EPYC 73F3 US $3521 8 × CCD
1 × I/O
16 (32) 8 x 2 3.50 4.00 256 MB
32 MB per CCX
240 W
EPYC 7343 US $1565 4 × CCD
1 × I/O
4 x 4 3.20 3.90 128 MB
32 MB per CCX
190 W
EPYC 7313 US $1083 3.00 3.70 155 W
EPYC 7313P US $913 SP3
1P
EPYC 72F3 US $2468 8 × CCD
1 × I/O
8 (16) 8 x 1 3.70 4.10 256 MB
32 MB per CCX
SP3
2P
180 W
  1. ^ Active Core Complexes (CCX) × Active cores per CCX.
  1. ^ a b c Su, Lisa (October 8, 2020). Where Gaming Begins, AMD Ryzen™ Desktop Processors.
  2. ^ a b c d Cutress, Ian; Frumusanu, Andrei (November 5, 2020). "AMD Zen 3 Ryzen Deep Dive Review: 5950X, 5900X, 5800X and 5600X Tested". www.anandtech.com. Retrieved December 7, 2020.
  3. ^ "https://en.wikichip.org/wiki/amd/packages/fp6"
  4. ^ a b c Joel Hruska (January 10, 2020). "AMD's Lisa Su Confirms Zen 3 Coming in 2020, Talks Challenges in Notebooks". ExtremeTech.
  5. ^ a b c Alcorn, Paul (October 5, 2019). "AMD dishes on Zen 3 and Zen 4 architecture, Milan and Genoa roadmap". Tom's Hardware. Retrieved October 5, 2019.
  6. ^ Dr. Ian Cutress (October 9, 2020). "AMD Ryzen 5000 and Zen 3 on Nov 5th: +19% IPC, Claims Best Gaming CPU". AnandTech.
  7. ^ Mark Knapp (October 8, 2020). "AMD Zen 3 release date, specs and price: everything we know about AMD Ryzen 5000". TechRadar.
  8. ^ Hruska, Joel (May 20, 2020). "AMD Will Support Zen 3, Ryzen 4000 CPUs on X470, B450 Motherboards". ExtremeTech. Retrieved May 20, 2020.
  9. ^ a b "AMD "Zen 3" Core Architecture". AMD. Retrieved November 8, 2020.
  10. ^ Alcorn, Paul (November 6, 2020). "AMD Zen 3 Ryzen 5000 Price, Specs, Release Date, Performance, All We Know". Tom's Hardware. Retrieved November 8, 2020.
  11. ^ "GeForce RTX 30 Series Performance Accelerates With Resizable BAR Support | GeForce News". NVIDIA. Retrieved August 13, 2021.
  12. ^ Alcorn, Paul (November 26, 2020). "AMD Ryzen 9 5950X and 5900X Review: Zen 3 Breaks the 5 GHz Barrier". Tom's Hardware. Retrieved December 25, 2020.
  13. ^ "AMD Ryzen 5 5600X Desktop Processor". AMD.
  14. ^ "AMD Ryzen 7 5800". AMD.
  15. ^ "AMD Ryzen 7 5800X Desktop Processor". AMD.
  16. ^ "AMD Ryzen 9 5900". AMD.
  17. ^ "AMD Ryzen 9 5900X Desktop Processor". AMD.
  18. ^ "AMD Ryzen 9 5950X Desktop Processor". AMD.
  19. ^ "AMD Ryzen 3 5300GE". AMD.
  20. ^ a b c d e f g "AMD Ryzen 5000G APUs: OEM Only For Now, Full Release Later This Year". AnandTech.
  21. ^ "AMD Ryzen™ 3 PRO 5350GE". AMD.
  22. ^ a b c d e f "AMD Announces Ryzen 5000G and PRO 5000G Desktop Processors". TechPowerUp. June 1, 2021.
  23. ^ "AMD Ryzen 3 5300G". AMD.
  24. ^ "AMD Ryzen™ 3 PRO 5350G". AMD.
  25. ^ "AMD Ryzen 5 5600GE". AMD.
  26. ^ "AMD Ryzen™ 5 PRO 5650GE". AMD.
  27. ^ "AMD Ryzen 5 5600G". AMD.
  28. ^ a b "AMD Ryzen 5000G: Zen 3 APUs for Desktop Coming August 5th". AnandTech.
  29. ^ "AMD Ryzen™ 5 PRO 5650G". AMD.
  30. ^ "AMD Ryzen 7 5700GE". AMD.
  31. ^ "AMD Ryzen™ 7 PRO 5750GE". AMD.
  32. ^ "AMD Ryzen 7 5700G". AMD.
  33. ^ "AMD Ryzen™ 7 PRO 5750G". AMD.
  34. ^ "AMD Ryzen™ 3 5400U". AMD.
  35. ^ "AMD Ryzen 3 5400U Mobile processor - 100-000000288". www.cpu-world.com. Retrieved September 17, 2021.
  36. ^ "AMD Ryzen™ 3 PRO 5450U". AMD.
  37. ^ "AMD Ryzen™ 5 5600U". AMD.
  38. ^ "AMD Ryzen™ 5 PRO 5650U". AMD.
  39. ^ "AMD Ryzen™ 5 5600H". AMD.
  40. ^ "AMD Ryzen 5 5600H Mobile processor - 100-000000296". www.cpu-world.com. Retrieved September 17, 2021.
  41. ^ "AMD Ryzen™ 5 5600HS". AMD.
  42. ^ "AMD Ryzen™ 7 5800U". AMD.
  43. ^ "AMD Ryzen™ 7 PRO 5850U". AMD.
  44. ^ "AMD Ryzen™ 7 5800H". AMD.
  45. ^ "AMD Ryzen 7 5800H Specs". TechPowerUp. Retrieved September 17, 2021.
  46. ^ "AMD Ryzen™ 7 5800HS". AMD.
  47. ^ "AMD Ryzen™ 9 5900HS". AMD.
  48. ^ "AMD Ryzen™ 9 5900HX". AMD.
  49. ^ "AMD Ryzen™ 9 5980HS". AMD.
  50. ^ "AMD Ryzen™ 9 5980HX". AMD.
  51. ^ Alcorn, Paul (March 15, 2021). "Watch AMD's EPYC 7003 Milan Launch Here". Tom's Hardware. Retrieved July 23, 2021.

References[edit]