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Castle Peak
General Info
Designer	AMD
Manufacturer	TSMC, GlobalFoundries
Introduction	November 7, 2019 (announced) November 25, 2019 (launched)
Microarchitecture
ISA	x86-64 (x86)
Microarchitecture	Zen 2
Chipset	TRX40, WRX80
Word Size	8 octets 16 nibbles 64 bit
Process	7 nm 0.007 μm 7.0e-6 mm , 12 nm 0.012 μm 1.2e-5 mm
Technology	CMOS
Clock	2,700 MHz - 4,000 MHz
Packaging
Template:packages/amd/socket strx4
Template:packages/amd/socket swrx8
Succession
Colfax Chagall

Castle Peak (CPK/CPKWS) is the codename for AMD's highest-performance enthusiasts microprocessors serving as a successor to Colfax, released in late 2019. Castle Peak-based processors are based on the Zen 2 microarchitecture and are fabricated on a TSMC 7 nm process.

Castle Peak-based microprocessors are branded as 3rd-generation Ryzen Threadripper.

Overview

Castle Peak chips are a series of high-performance desktop processors designed by AMD based on their Zen 2 microarchitecture.

Input/Output Interfaces

"Castle Peak" processors integrate eight PCIe controllers and four SATA controllers. Workstation (-WX) models have eight 16-lane PCIe Gen 1, 2, 3, 4 (16 GT/s) interfaces, each configurable as up to eight x16/x8/x4/x2/x1 wide (e.g. 1x4 + 4x1 + 1x8) links, so 128 lanes total. Some of these lanes are configurable as SATA Gen 1, 2, 3 (6 Gb/s) link. Up to 32 SATA ports are available from the processor in total, as well as four USB 3.2 Gen 2×1 (10 Gb/s) ports, and various low speed interfaces. For details see Socket sWRX8.

On "Castle Peak" HEDT processors only one half of these PCIe and SATA resources are available, i.e. 64 PCIe lanes on four 16-lane interfaces and up to 16 SATA ports in total. For details see Socket sTRX4.

On Socket sTRX4 and sWRX8 motherboards the PCIe interfaces are generally used for x8 and x16 (electrically) PCIe slots and x4 M.2 NVMe/SATA SSD connectors, leveraging few of the CPU's SATA ports. One x8 PCIe link on the processor is reserved to attach the AMD TRX40 (HEDT) or WRX80 (workstation) chipset which serves as I/O expander. These devices are members of the AMD-500 Series along with the X570 chipset for Socket AM4 processors. A notable difference are four additional PCIe lanes available on the X570 as that chipset is attached with an x4 link.

Both the TRX40 and WRX80 offer 16 lanes (plus 8-lane CPU link) PCIe Gen 1, 2, 3, 4; 12 SATA Gen 1, 2, 3 ports, eight sharing pins with the PCIe interface and four dedicated; eight USB 3.2 Gen 2 (10 Gb/s) ports, and four (TRX40) or five (WRX80) USB 2.0 ports. The chipset PCIe interfaces are generally used for PCIe slots, on-board Ethernet controllers, M.2 NVMe/SATA SSD and M.2 WLAN connectors. An audio interface is not provided by the processor or the chipsets, an audio controller is commonly attached as on-board USB device. The sTRX4/TRX40 platform supports overclocking, the sWRX8/WRX80 platform does not.

Common Features

All Castle Peak processors have the following:

• Up to 64 cores / 128 threads
• Everything up to AVX2 (i.e., SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, FMA3, and AVX2), and SHA

HEDT processors:

• 64 PCIe lanes
• Quad-channel Memory
• Up to DDR4-3200 ECC
• Up to 256 GiB using eight 32 GiB UDIMMs (up to 1 TiB/channel addressable)

Workstation processors:

• 128 PCIe lanes
• Octa-channel Memory
• Up to DDR4-3200 ECC
• Up to 2 TiB using eight 256 GiB LRDIMMs or 3DS DIMMs (up to 1 TiB/channel addressable)

Castle Peak Processors

Model	Family	Microarch.	Cores	Threads	L2$	L3$	Base	Turbo	Memory	TDP	Socket	Launched	Price	OPN
3960X	Ryzen Threadripper	Zen 2	24	48	12 MiB 12,288 KiB 12,582,912 B 0.0117 GiB	128 MiB 131,072 KiB 134,217,728 B 0.125 GiB	3.8 GHz 3,800 MHz 3,800,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sTRX4, FCLGA-4094	25 November 2019	$ 1,399.00 € 1,259.10 £ 1,133.19 ¥ 144,558.67	100-000000010, 100-100000010WOF
3970X	Ryzen Threadripper	Zen 2	32	64	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	128 MiB 131,072 KiB 134,217,728 B 0.125 GiB	3.7 GHz 3,700 MHz 3,700,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sTRX4, FCLGA-4094	25 November 2019	$ 1,999.00 € 1,799.10 £ 1,619.19 ¥ 206,556.67	100-000000011, 100-100000011WOF
3980X	Ryzen Threadripper	Zen 2	48	96	24 MiB 24,576 KiB 25,165,824 B 0.0234 GiB		3.2 GHz 3,200 MHz 3,200,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	FCLGA-4094, sTRX4
3990X	Ryzen Threadripper	Zen 2	64	128	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	256 MiB 262,144 KiB 268,435,456 B 0.25 GiB	2.9 GHz 2,900 MHz 2,900,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sTRX4, FCLGA-4094	7 February 2020	$ 3,990.00 € 3,591.00 £ 3,231.90 ¥ 412,286.70	100-000000163, 100-100000163WOF
PRO 3945WX	Ryzen Threadripper	Zen 2	12	24	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	64 MiB 65,536 KiB 67,108,864 B 0.0625 GiB	4 GHz 4,000 MHz 4,000,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sWRX8, FCLGA-4094	14 July 2020		100-000000168
PRO 3955WX	Ryzen Threadripper	Zen 2	16	32	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	64 MiB 65,536 KiB 67,108,864 B 0.0625 GiB	3.9 GHz 3,900 MHz 3,900,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sWRX8, FCLGA-4094	14 July 2020		100-000000167, 100-100000167WOF
PRO 3975WX	Ryzen Threadripper	Zen 2	32	64	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	128 MiB 131,072 KiB 134,217,728 B 0.125 GiB	3.5 GHz 3,500 MHz 3,500,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sWRX8, FCLGA-4094	14 July 2020		100-000000086, 100-100000086WOF
PRO 3995WX	Ryzen Threadripper	Zen 2	64	128	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	256 MiB 262,144 KiB 268,435,456 B 0.25 GiB	2.7 GHz 2,700 MHz 2,700,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	DDR4-3200	280 W 280,000 mW 0.375 hp 0.28 kW	sWRX8, FCLGA-4094	14 July 2020		100-000000087, 100-100000087WOF
Count: 8

SKU Comparison

Below are a number of SKU comparison graphs based on their specifications.

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Bibliography

• "TRX40 Motherboards for 3rd Gen Ryzen™ Threadripper™ processors" AMD.com.
• "Socket sWRX WRX80 Motherboards" AMD.com.
• "Infrastructure Roadmap for sTRX4 and sWRX8 Processors", AMD Publ. #56443, Rev. 0.92, July 2021

See also

Zen 2 Rome Castle Peak Matisse Renoir

Power/Performance