Zen+

Zen+ is the codename for a computer processor microarchitecture by AMD. It is the successor to the first gen Zen microarchitecture,[3] first released in April 2018,[4] powering the second generation of Ryzen processors, known as Ryzen 2000 for mainstream desktop systems, Threadripper 2000 for high-end desktop setups and Ryzen 3000G (instead of 2000G) for accelerated processing units (APUs).

AMD Zen+

General Info
Launched	April 2018
Designed by	AMD
Common manufacturer(s)	GlobalFoundries
Cache
L1 cache	64 KiB instruction, 32 KiB data per core
L2 cache	512 KiB per core
L3 cache	8 MiB per quad-core CCX
Physical specifications
Transistors	12 nm (FinFET)
Cores	4-6 (mainstream) 8 (performance) 12-32 (enthusiast)[1]
Socket(s)	Socket AM4 Socket TR4
Products, models, variants
Product code name(s)	Pinnacle Ridge (Desktop)[2] Colfax (HEDT)[1] Picasso (APU/Embedded)
Brand name(s)	Ryzen Ryzen Threadripper
History
Predecessor	Zen (1st gen)
Successor	Zen 2

Features

Die shot of Ryzen 5-2600

Zen+ uses GlobalFoundries' 12 nm fabrication process,[5] an optimization of the 14 nm process used for Zen, with only minor design rule changes.[6] This means that the die sizes between Zen and Zen+ are identical as AMD chose to use the new smaller transistors to increase the amount of empty space, or "dark silicon", between the various features on the die. This was done to improve power efficiency & reduce thermal density to allow for higher clock speeds, rather than design an entirely new floorplan for a physically smaller die.[7] These process optimizations allowed 12 nm Zen+ to clock about +250MHz (≈6%) higher, while also lowering power consumption when at the same frequency by over 10%, when compared to their prior 14 nm Zen products[8]. Although conversely at the microarchitecture level, Zen+ had only minor revisions versus Zen.[6] Known changes to the microarchitecture include improved clock speed regulation in response to workload ("Precision Boost 2"),[9] reduced cache and memory latencies (some significantly so), increased cache bandwidth, and finally improved IMC performance allowing for better DDR4 memory support (officially JEDEC rated to support up to 2933MHz versus just 2666MHz for Zen).[10]

Zen+ also supports improvements in the per-core clocking features, based on core utilization and CPU temperatures.[6] These changes to the core utilization, temperature, and power algorithms are branded as "Precision Boost 2" and "XFR2" ("eXtended Frequency Range 2"), evolutions of the first-generation technologies in Zen. On Zen, XFR gave an additional 50 to 200 MHz clock speed increase (in 25 MHz increments) over the maximum Precision Boost clocks. For Zen+, XFR2 is no longer listed as a separate clock modifier. Instead, the XFR temperature, power, and clock monitoring and logic feeds into the Precision Boost 2 algorithm to adjust clocks and power consumption opportunistically and dynamically.[11][12]

Ultimately, the changes in Zen+ resulted in a 3% improvement in IPC over Zen; which in conjunction with 6% higher clock speeds resulted in up to 10% overall increase in performance.[6]

Feature tables

CPUs

CPU features table

APUs

APU features table

Products

Desktop CPUs

Model	Release date and price	Process	Cores (threads)	Clock rate (GHz)		Cache[lower-roman 1]			Socket	PCIe lanes[lower-roman 2]	Memory support	TDP	Part number
				Base	PB2	L1	L2	L3
Entry-level
Ryzen 3 1200 AF (12nm Refresh) [15]	April, 2020 US $60	GloFo 12LP (14LP+)	4 (4)	3.1	3.4	64 KB inst. 32 KB data per core	512 KB per core	8 MB	AM4	24	DDR4-2933 dual-channel	65 W	YD1200BBM4KAF
Ryzen 3 2300X [16]	September 10, 2018 OEM			3.5	4.0
Mainstream
Ryzen 5 2500X [17]	September 10, 2018 OEM	GloFo 12LP (14LP+)	4 (8)	3.6	4.0	64 KB inst. 32 KB data per core	512 KB per core	8 MB	AM4	24	DDR4-2933 dual-channel	65W
Ryzen 5 2600E [18]	September 2018 OEM		6 (12)	3.1	4.0			16 MB			DDR4-2667 dual-channel	45 W
Ryzen 5 1600 AF (12 nm refresh)[19]	October 11, 2019 US $85			3.2	3.6						DDR4-2933 dual-channel	65W	YD1600BBM6IAF
Ryzen 5 2600 [20]	April 19, 2018 US $199			3.4	3.9
Ryzen 5 2600X [21]	April 19, 2018 US $229			3.6	4.2							95 W
	November 23, 2018 UK £221.99
Performance
Ryzen 7 2700E [22]	September 11, 2018 OEM	GloFo 12LP (14LP+)	8 (16)	2.8	4.0	64 KB inst. 32 KB data per core	512 KB per core	16 MB	AM4	24	DDR4-2666 dual-channel	45 W
Ryzen 7 2700 [23]	April 19, 2018 US $299			3.2	4.1						DDR4-2933 dual-channel	65 W
	November 23, 2018 UK £285.49
Ryzen 7 Pro 2700 [24]	April 2018 OEM			3.2	4.1
Ryzen 7 Pro 2700X [25]	September 6, 2018 OEM			3.6	4.1							95W
Ryzen 7 2700X [26]	April 19, 2018 US $329			3.7	4.3							105W
High-end desktop (HEDT)
Ryzen Threadripper 2920X [27]	October 2018 US $649	GloFo 12LP (14LP+)	12 (24)	3.5	4.3	64 KB inst. 32 KB data per core	512 KB per core	32 MB	TR4	64	DDR4-2933 quad-channel	180 W
Ryzen Threadripper 2950X [28]	August 31, 2018 US $899		16 (32)	3.5	4.4
Ryzen Threadripper 2970WX [29]	October 2018 US $1299		24 (48)	3.0	4.2			64 MB				250 W
Ryzen Threadripper 2990WX [30]	August 13, 2018 US $1799		32 (64)	3.0	4.2

1. AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[13]
2. PCIe lane count includes 4 lanes used for connectivity to the chipset.[14]

Desktop APUs

Model	Release Date & Price	Fab	CPU						GPU				Memory support	TDP
			Cores (threads)	Clock rate (GHz)		Cache[lower-alpha 1]			Model	Config[lower-alpha 2]	Clock	Processing power (GFLOPS)[lower-alpha 3]
				Base	Boost	L1	L2	L3
Athlon Pro 300GE[32]	September 30, 2019 OEM	12nm	2 (4)	3.4	N/A	64 KB inst. 32 KB data per core	512 KB per core	4 MB	Vega 3	192:12:4 3 CU	1100 MHz	424.4	DDR4-2667 dual-channel	35 W
Athlon Silver Pro 3125GE[33]	July 21, 2020 OEM
Athlon Gold 3150GE[34]			4 (4)	3.3	3.8								DDR4-2933 dual-channel
Athlon Gold Pro 3150GE[35]
Athlon Gold 3150G[36]				3.5	3.9									45-65 W
Athlon Gold Pro 3150G[37]
Ryzen 3 3200GE[38]	July 7, 2019 OEM			3.3	3.8				Vega 8	512:32:16 8 CU	1200 MHz	1228.8		35 W
Ryzen 3 Pro 3200GE[39]	September 30, 2019 OEM
Ryzen 3 3200G[40]	July 7, 2019 US $99			3.6	4.0						1250 MHz	1280		45-65 W
Ryzen 3 Pro 3200G[41]	September 30, 2019 OEM
Ryzen 5 Pro 3350GE[42]	July 21, 2020 OEM		4 (8)	3.3	3.9				RX Vega 10	640:40:16 10 CU	1200 MHz	1536		35 W
Ryzen 5 Pro 3350G[43]				3.6	4.0						1300 MHz	1664		45-65 W
Ryzen 5 3400GE[44]	July 7, 2019 OEM			3.3	4.0				RX Vega 11	704:44:16 11 CU		1830.4		35 W
Ryzen 5 Pro 3400GE[45]	September 30, 2019 OEM
Ryzen 5 3400G[46]	July 7, 2019 US $149			3.7	4.2						1400 MHz	1971.2		45-65 W
Ryzen 5 Pro 3400G[47]	September 30, 2019 OEM

1. AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[31]
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

Model	Release date	Process	CPU						GPU				Memory support	TDP	Part number
			Cores (threads)	Clock rate (GHz)		Cache[lower-roman 1]			Model	Config[lower-roman 2]	Clock	Processing power (GFLOPS)[lower-roman 3]
				Base	Boost	L1	L2	L3
Ryzen 3 3300U[48]	January 6, 2019	GloFo 12LP (14LP+)	4 (4)	2.1	3.5	64 KB inst. 32 KB data per core	512 KB per core	4 MB	Vega 6	384:24:8 6 CU[49]	1200 MHz	921.6	DDR4-2400 dual-channel	15 W	YM3300C4T4MFG
Ryzen 3 PRO 3300U[50]															YM330BC4T4MFG
Ryzen 5 3500U[51]			4 (8)		3.7				Vega 8	512:32:16 8 CU[52]		1228.8			YM3500C4T4MFG
Ryzen 5 PRO 3500U[53]															YM350BC4T4MFG
Ryzen 5 3550H[54]														35 W	YM3500C4T4MFG
Ryzen 5 3580U[55]	October 2019								Vega 9	576:36:16 9 CU	1300 MHz	1497.6		15 W
Ryzen 7 3700U[56]	January 6, 2019			2.3	4.0				Vega 10	640:40:16 10 CU[57]	1400 MHz	1792.0			YM3700C4T4MFG
Ryzen 7 PRO 3700U[58]															YM370BC4T4MFG
Ryzen 7 3750H[59]														35 W	YM3700C4T4MFG
Ryzen 7 3780U[60]	October 2019								Vega 11	704:44:16 11 CU		1971.2		15 W

1. AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[13]
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.

See also

• AMD K9
• AMD K10
• Jim Keller (engineer)
• Ryzen
• Steamroller (microarchitecture)
• Zen (microarchitecture)
• Zen 2

References

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