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Socket TR4
General Info
Designer	AMD
Introduction	May 16, 2017 (announced) August 10, 2017 (launched)
Market	Desktop, Workstation
Microarchitecture	Zen, Zen+
TDP	180 W 180,000 mW 0.241 hp 0.18 kW , 250 W 250,000 mW 0.335 hp 0.25 kW
Package
Name	TR4, FCLGA-4094
Type	FC-OLGA
Contacts	4094
Dimension	75.40 mm 7.54 cm 2.969 in × 58.50 mm 5.85 cm 2.303 in × 6.26 mm 0.246 in
Pitch	0.87 mm 0.0343 in × 1.00 mm 0.0394 in
Socket
Name	TR4, SP3r2, sTR4
Type	SM-LGA
Succession
Socket sTRX4 Socket sWRX8

Socket TR4 a.k.a. Socket SP3r2 and sTR4 is a microprocessor socket designed by AMD for their first and second generation Ryzen Threadripper high-end desktop processors. It was superseeded by Socket sTRX4. Contemporary mainstream desktop processors use Socket AM4, server processors Socket SP3.

Socket TR4 is mechanically identical and almost pin-compatible to Socket SP3 and the sockets sTRX4 and sWRX8 also derived from it, but differs by the number of memory channels and I/O interfaces available: SP3 processors use DDR4 RDIMMs on up to eight memory channels, sWRX8 processors UDIMMs or RDIMMs, while TR4 and sTRX4 processors support only UDIMMs on up to four memory channels. TR4 and sTRX4 omit four of eight PCIe interfaces present on Socket SP3 and sWRX8, but TR4 processors also pin out four additional USB ports, a HDA interface, and other client-oriented features which are not supported by the other infrastructures.

Overview

Socket TR4 is a zero insertion force, screw actuated, surface-mount land grid array socket for use with a 4094-contact, 1.00 mm × 0.87 mm interstitial pitch, organic land grid array CPU package.

It supports four channels of 72-bit DDR4 memory with up to two DIMMs per channel, four 16-lane PCIe Gen 3 I/O interfaces, eight USB 3.1 Gen 1 ports, and up to 16 SATA Gen 3 ports. 8-layer motherboards are required to route these signals.

The following AMD processor families use Socket TR4:

	CPU Family	Microarch.	Process	Products
Type 0	Family 17h Models 00h–0Fh	Zen	GlobalFoundries 14 nm (14LPP)	Threadripper 1900 "Whitehaven" (Model 01h)
		Zen+	GlobalFoundries 12 nm (12LP)	Threadripper 2900 "Colfax" (Model 08h)

Codenames of AMD TR4 reference platforms (CRBs) are "Whitehaven", "Whitehaven OPS", and "Whitehaven DAP".

Package Description

The TR4 CPU package is lidded, has a 58.50 mm × 75.40 mm organic substrate with flip chip die attachment, and 4094 nickel and gold plated land pads. It ships with a carrier frame pre-installed. The carrier frame, made from an orange colored polycarbonate material, is a part of the package loading mechanism and remains on the package in the socket.

The package substrate has six keying notches along the short edges preventing it from being inserted 180 degrees rotated into the carrier frame or socket, or in an incompatible socket with mismatching keying features. Four additional positions are reserved for future models. However all sockets SP3, TR4, sTRX4, and sWRX8, and all processors for these sockets have the same keying. TR4 packages are electrically keyed by pin SP3R2 and Socket TR4 motherboards are not supposed to power up the socket if a SP3 or sWRX8 processor is installed. To boot the processor they must also provide compatible firmware.

The lid a.k.a. integrated heat spreader has an internal support bar bisecting the dies in the package. Decoupling capacitors are placed under the lid around the chiplet periphery on the top side, and in two windows in the pad grid on the bottom side. TR4 packages use solder as TIM between the dies and the lid with ≈ 62 W/(m⋅K). A triangular symbol on both sides of the substrate marks the location of pin A1, with corresponding markings on the socket.

TR4 is a multi-chip package integrating two identical dies and two dummies for mechanical stability. Each die contains eight CPU cores and implements one half of the processor's memory and I/O interfaces. Model 01h uses "Zeppelin" ZP-B1 dies, Model 08h "Pinnacle Ridge" PiR-B2 dies. AMD used the same dies in various revisions for first generation EPYC server and embedded processors, and the first two generations of Ryzen desktop processors without iGPU; see CPU Family 17h. The dummies were shown to be patterned dies and are probably rejects. TR4 processors utilize customized, single-ended, 4:1 Serializer–Deserializer (SerDes) links on several package routing layers, 32 lanes wide in each direction, to connect the dies. The SerDes run at FCLK so for instance a 1.33 GHz FCLK coupled to the bus clock of DDR4-2666 SDRAM gives a raw data rate of 5.33 GT/s per lane or 21.33 GB/s in each direction.

Socket TR4 was derived from Socket SP3, avoiding the expenses of designing and producing another socket for a small market segment. AMD actually designed a more compact dual-die BGA package SP4 for EPYC 3000 embedded processors. TR4 packages are not merely EPYC processors with two disabled dies, the signal routing is different. Only the four memory channels pinned out closest to the package edge, and only four of the eight PCIe interfaces are connected to the two active dies. The interfaces were renumbered to reflect this. Two, rather than just one, Data Fabric on-package links connect the dies. Since each die actually implements four USB ports and an audio controller some unused lands were repurposed to pin out these signals in addition to the four USB ports supported by Socket SP3.

TR4 package top view, not to scale		SP3 Type-0 package for comparison

CAKEs extend the Data Fabric transport layer off-chip by connecting to a CAKE in another die. Their PCS interface drives a GMI (same socket) or xGMI (different socket) physical link. Each die has two 16-lane multi-function I/O interfaces. Type A supports the PCIe, SATA, and XGBE protocols, Type B only PCIe. CAKE2/CAKE3 and the I/O controllers share a 16-lane PHY group. CS0 and CS1 are the Data Fabric's interface to the memory controllers, UMC0 and UMC1 respectively. Not shown are the Control Fabric interfaces which use TWIX (same socket) or WAFL (different socket) physical links, USB signals (USB0 group from die 0, USB1 from die 1), and low speed busses. For details and the on-chip topology see AMD Infinity Fabric.

Socket TR4 has four 16-lane multi-function I/O interfaces P0, P1, G0, and G1. All of these interfaces can be configured as PCIe link, some lanes alternatively as SATA link. The xGMI, S-Link, and XGBE protocols are not supported on this socket, nor is the WAFL interface. (xGMI and WAFL connect the Data and Control Fabrics of each processor on dual-socket server platforms. S-Link is a cache coherent link to CCIX memory expanders. XGBE is a backplane Ethernet link with data rates up to 10 Gbit/s.)

Socket Description

Socket TR4 (SP3r2) is mechanically identical to Socket SP3.

Feature Summary

• Lidded land grid array package, 75.40 mm × 58.50 mm
  • 4094 contacts in a 82 × 55 grid with 0.87 mm × 1.00 mm interstitial pitch
  • Organic substrate, flip chip die attachment

• 4 × 64/72 bit DDR4 SDRAM interface
  • Up to 1467 MHz, PC4-23466 (DDR4-2933), 93.87 GB/s total raw bandwidth, not overclocked
  • Up to 2 DIMMs/channel; SR/DR UDIMMs only
  • ECC support
  • Memory addressing up to ? GiB/channel
  • Max. total memory capacity 256 GiB using eight 32 GiB DIMMs

• Four multi-function I/O interfaces P0, P1, G0, G1

Lane

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

PCIe

x16

x8

x8

x4

x4

x4

x4

x2

x2

x2

x2

x2

x2

x2

x2

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

x1

SATA

7

6

5

4

3

2

1

0

PHY 4

PHY 3

PHY 2

PHY 1

PHY 0

• PCIe Gen 1, 2, 3 (8 GT/s) protocol supported on all interfaces
  • 16 lanes, up to 8 ports per interface configurable x16, x8, x4, x2, x1 with power-of-two alignment (e.g. 1x4 + 4x1 + 1x8)
  • Max. 7 PCIe ports in each 8-lane subset (e.g. 0x8 + 8x1 is not possible)
  • Max. 7 PCIe ports per interface if any lane is configured as SATA port
  • Different PCIe generations supported on the ports in the same interface
  • Lane polarity inversion, per port lane reversal
  • Up to 60 PCIe lanes total (one x4 link reserved for chipset attachment)

• SATA Gen 1, 2, 3 (6 Gb/s) protocol supported on the lower 8 lanes of P0 and G1
  • P0: SATA00-07, G1: SATA10-17
  • Up to 16 SATA ports total

• Five PHY groups on each interface
  • Lanes sharing a PHY group must use the same protocol (PCIe, SATA)

• 8 × USB 1.1, 2.0, 3.1 Gen 1 (5 Gb/s)

• Low speed interfaces (some sharing pins):
  • HDA 1.0
  • 2 × 4-wire or 4 × 2-wire UART modeled after the 16550
  • LPC
  • 1/2/4-bit SPI/eSPI up to 100 MHz (SPI) and 66 MHz (eSPI)
  • 6 × I²C
  • 2 × SMBus
  • 2 × SATA DevSlp
  • 89 × GPIO
  • Sideband Interface (SB-TSI)
  • 2 × Serial VID Interface (SVI2)
  • JTAG

Chipset

TR4 processors are SoCs with an integrated controller hub so they do not require a chipset, but are paired with the AMD X399 chipset (AMD 300-Series) serving as I/O expander.

The chipset is attached with an x4 PCIe Gen 3 link and can provide the following additional interfaces:

• 8 lanes PCIe Gen 1, 2 (5 GT/s)
• 2 × SATA Express (two PCIe lanes or two SATA ports each)
• 4 × SATA Gen 1, 2, 3 (6 Gb/s)
• 2 × USB 1.1, 2.0, 3.1 Gen 2 (10 Gb/s)
• 6 × USB 1.1, 2.0, 3.1 Gen 1 (5 Gb/s)
• 6 × USB 1.1, 2.0

Processors using Socket TR4

Model	Cores	Threads	L2$	L3$	Base	Turbo	Memory	TDP	Launched	Price	OPN
1900X	8	16	4 MiB 4,096 KiB 4,194,304 B 0.00391 GiB	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	3.8 GHz 3,800 MHz 3,800,000 kHz		DDR4-2666	180 W 180,000 mW 0.241 hp 0.18 kW	31 August 2017	$ 549.00 € 494.10 £ 444.69 ¥ 56,728.17	YD190XA8AEWOF
1920X	12	24	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	3.5 GHz 3,500 MHz 3,500,000 kHz		DDR4-2666	180 W 180,000 mW 0.241 hp 0.18 kW	10 August 2017	$ 799.00 € 719.10 £ 647.19 ¥ 82,560.67	YD192XA8AEWOF
1950X	16	32	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	3.4 GHz 3,400 MHz 3,400,000 kHz		DDR4-2666	180 W 180,000 mW 0.241 hp 0.18 kW	10 August 2017	$ 999.00 € 899.10 £ 809.19 ¥ 103,226.67	YD195XA8AEWOF
2920X	12	24	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	3.5 GHz 3,500 MHz 3,500,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	DDR4-3600	180 W 180,000 mW 0.241 hp 0.18 kW	29 October 2018	$ 649.00 € 584.10 £ 525.69 ¥ 67,061.17	YD292XA8UC9AF
2950X	16	32	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB	3.5 GHz 3,500 MHz 3,500,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	DDR4-2933	180 W 180,000 mW 0.241 hp 0.18 kW	31 August 2018	$ 899.00 € 809.10 £ 728.19 ¥ 92,893.67	YD295XA8UGAAF
2970WX	24	48	12 MiB 12,288 KiB 12,582,912 B 0.0117 GiB	64 MiB 65,536 KiB 67,108,864 B 0.0625 GiB	3 GHz 3,000 MHz 3,000,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	DDR4-2933	250 W 250,000 mW 0.335 hp 0.25 kW	29 October 2018	$ 1,299.00 € 1,169.10 £ 1,052.19 ¥ 134,225.67	YD297XAZUHCAF
2990WX	32	64	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	64 MiB 65,536 KiB 67,108,864 B 0.0625 GiB	3 GHz 3,000 MHz 3,000,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	DDR4-2933	250 W 250,000 mW 0.335 hp 0.25 kW	13 August 2018	$ 1,799.00 € 1,619.10 £ 1,457.19 ¥ 185,890.67	YD299XAZUIHAF, YD299XAZAFWOF
Count: 7

Photos

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Package Diagrams

TR4 package. All dimensions in millimeters.

Pin Map

Socket TR4 (SP3r2) pinout, top view. This is a preview, click for a larger image and other views.

Pin Description

Signal	Type	Description
MA-MD_ACT_L	O-IOMEM-S	DRAM Channel A-D Activation Command
MA-MD_ADD[13:0]	O-IOMEM-S	DRAM Column/Row Address
MA-MD_ADD_17	O-IOMEM-S	DRAM Column/Row Address 17
MA-MD_ALERT_L	I-IOMEM-S	DRAM Alert (CRC error and Command/Address parity error)
MA-MD_BANK[1:0]	O-IOMEM-S	DRAM Bank Address
MA-MD_BG[1:0]	O-IOMEM-S	DRAM Bank Group
MA-MD_CAS_L_ADD[15]	O-IOMEM-S	DRAM Column Address Strobe or Column/Row Address 15
MA-MD_CHECK[7:0]	B-IOMEM-S	DRAM ECC Check Bits
MA-MD_C[2:0]	O-IOMEM-S	DRAM Chip ID Signals
MA-MD_DATA[63:0]	B-IOMEM-S	DRAM Data Bus
MA-MD_DQS_H/L[8:0]	B-IOMEM-S	DRAM Differential Data Strobe
MA-MD_DQS_H[17:9]	B-IOMEM-S	DRAM Differential Data Strobe for RDIMMs, DM[8:0] Data Mask output for UDIMMs; RDIMMs not supported on Socket TR4
MA-MD_DQS_L[17:9]	B-IOMEM-S	DRAM Differential Data Strobe for RDIMMs, not connected for UDIMMs
MA-MD_EVENT_L	I-IOMEM-S	DRAM Thermal Event
MA-MD_PAROUT	O-IOMEM-S	DRAM Command and Address Parity
MA-MD_RAS_L_ADD[16]	O-IOMEM-S	DRAM Row Address Strobe or Column/Row Address 16
MA-MD_RESET_L	O-IOMEM-S	DRAM Reset
MA-MD_WE_L_ADD[14]	O-IOMEM-S	DRAM Write Enable or Column/Row Address 14
MA-MD_ZVSS	A	DRAM Interface Drive-Strength Auto-Compensation Resistor to VSS
MA0-MD0_CKE[1:0] MA1-MD1_CKE[1:0]	O-IOMEM-S	DRAM Channel A-D DIMM 0-1 Clock Enable
MA0-MD0_CLK_H/L[1:0] MA1-MD1_CLK_H/L[1:0]	O-IOMEM-D	DRAM Channel A-D DIMM 0-1 Differential Clock
MA0-MD0_CS_L[1:0] MA1-MD1_CS_L[1:0]	O-IOMEM-S	DRAM Channel A-D DIMM 0-1 Chip Select
MA0-MD0_ODT[1:0] MA1-MD1_ODT[1:0]	O-IOMEM-S	DRAM Channel A-D DIMM 0-1 Enable Pin for On Die Termination
FORCE_SELFREFRESH	I-IO33-S	NVDIMM Force Self-Refresh; NVDIMMs not supported on Socket TR4
NV_SAVE_L	O-IO18-S	NVDIMM SAVE Signal
P0/P1_RXP/RXN[15:0]	I-PCIE-D	PCIe Interface P0/P1 Receive Data Differential Pairs
P0/P1_TXP/TXN[15:0]	O-PCIE-D	PCIe Transmit Data Differential Pairs
P0A/P1B_ZVSS	A	PCIe Drive-Strength Auto-Compensation Resistor to VSS for P0/P1
G0/G1_RXP/RXN[15:0]	I-PCIE-D	PCIe Interface G0/G1 Receive Data Differential Pairs
G0/G1_TXP/TXN[15:0]	O-PCIE-D	PCIe Transmit Data Differential Pairs
G0B/G1A_ZVSS	A	PCIe Drive-Strength Auto-Compensation Resistor to VSS for G0/G1
PCIE_RST(0-1)_L		Reset signal for PCIe devices, die 0/1
WAFL_RXP/RXN[1:0]	I-WAFL-D	WAFL Receive Data Differential Pairs; WAFL not supported on Socket TR4
WAFL_TXP/TXN[1:0]	O-WAFL-D	WAFL Transmit Data Differential Pairs
WAFL(0-1)_ZVSS	A	WAFL Drive-Strength Auto-Compensation Resistor to VSS, die 0/1
SATA(0-1)(0-7)_RXP/RXN	I-SATA-D	SATA Receive Data Differential Pairs (alt. func. of P0, G1 lane 0-7)
SATA(0-1)(0-7)_TXP/TXN	O-SATA-D	SATA Transmit Data Differential Pairs
DEVSLP(0-1)		SATA DEVSLP
SATA_ACT_0/1_L		SATA Channel Active (HD LED), die 0/1
SGPIO(0-1)_CLK	O-IO33S5-S	SGPIO Interface CLK Output; SGPIO not supported on Socket TR4
SGPIO(0-1)_DATAIN	I-IO33S5-S	SGPIO DATA Input
SGPIO(0-1)_DATAOUT	O-IO33S5-S	SGPIO DATA Output
SGPIO(0-1)_LOAD	O-IO33S5-S	SGPIO LOAD Output
XGBE(0-1)(0-3)_RXP/RXN	I-XGBE-D	XGBE Receive Data Differential Pairs (alt. func. of P0, G1 lane 4-7); XGBE not supported on Socket TR4
XGBE(0-1)(0-3)_TXP/TXN	O-XGBE-D	XGBE Transmit Data Differential Pairs
MDIO(0-3)_SCL		MDIO Port 0-3 Clock (alt. func. of SGPIO interface); MDIO not supported on Socket TR4
MDIO(0-3)_SDA		MDIO Data
USB_0/1_HSD(0-3)P/N	B-IO33S5-D	USB Port 0-3 High Speed I/O Differential Pairs; die 0/1
USB_0/1_SS_(0-3)RXP/RXN	I-USBS5-D	USB Port 0-3 Super Speed Receive Differential Pairs; die 0/1
USB_0/1_SS_(0-3)TXP/TXN	O-USBS5-D	USB Port 0-3 Super Speed Transmit Differential Pairs; die 0/1
USB_0/1_OC(0-3)_L	I-IO33S5-S	USB Port 0-3 Over Current signal from USB connector; die 0/1
USB_0/1_(0-3)_ZVSS	A	USB Port 0-3 Drive-Strength Auto-Compensation Resistor to VSS; die 0/1
AZ_BITCLK	B-AUD_S5-S	Azalia HD Audio Interface Bit Clock; all audio signals routed to die 0
AZ_RST_L	B-AUD_S5-S	HDA Reset
AZ_SDIN(0-2)	B-AUD_S5-S	HDA Serial Data Input from Codec 0-2
AZ_SDOUT	B-AUD_S5-S	HDA Serial Data Output to Codec
AZ_SYNC	B-AUD_S5-S	HDA Sync Signal to Codec
SPKR	O-IO33-S	PC speaker/beeper PWM output
UART(0-1)_CTS_L	I-IO33-S	UART Clear To Send Input (alt. func. of UART(2-3)_RXD)
UART(0-1)_INTR	B-IO33-S	UART Interrupt Request
UART(0-1)_RTS_L	B-IO33-S	UART Request To Send Output (alt. func. of UART(2-3)_TXD)
UART(0-3)_RXD	I-IO33-S	UART Receive Data
UART(0-3)_TXD	O-IO33-S	UART Transmit Data
SPI_CLK	O-IO18-S	SPI Clock; all SPI signals routed to die 0
SPI_DO	B-IO18-S	SPI Data Out or Data 0 for multi-I/O ESPI device
SPI_DI	B-IO18-S	SPI Data In or Data 1
SPI_WP_L	B-IO18-S	SPI Write Protect or Data 2
SPI_HOLD_L	B-IO18-S	SPI Hold Signal (asserted low to hold the SPI transaction) or Data 3
PSP_ROM_CS_L SPI_TPM_CS_L	O-IO18-S	SPI Chip Select for PSP ROM or TPM
SPI_CS1/CS2_L	O-IO18-OD	SPI Chip Select
ESPI_CLK	O-IO18-S	ESPI Clock (alt. func. of SPI_CLK)
ESPI_DAT(0-3)	B-IO33-S	ESPI Data[0], Data[1:0], Data[3:0] (alt. func. of SPI_DO/DI/WP_L/HOLD_L)
ESPI_CS_L	O-IO18-S	ESPI Chip Select (SPI_CS2_L)
ESPI_ALERT_L	I-DUAL-S	ESPI Alert Input (LDRQ0_L)
ESPI_RESET_L	B-IO33-S	ESPI Reset (KBRST_L)
LAD(0-3)	B-IO33-S	LPC Command/Address/Data; all LPC signals routed to die 0
LDRQ0_L	I-IO33-S	Encoded DMA/Bus Master Request 0
LFRAME_L	O-IO33-S	LPC Bus Frame
LPCCLK(0-1)	O-IO33-S	LPC 33 MHz Clock
LPC_CLKRUN_L	B-IO33-OD	LPC CLKRUN Signal
LPC_PD_L	O-DUAL_S5-S	LPC Power Down
LPC_PME_L	I-IO33S5-S	LPC Power Management Event
LPC_RST_L	O-IO33S5-S	LPC Reset
LPC_SMI_L	I-IO33-S	LPC System Management Interrupt
SERIRQ	B-IO33-S	Serial IRQ for DMA
I2C(0-5)_SCL	B-DUAL-OD	I2C Port 0-5 Clock
I2C(0-5)_SDA	B-DUAL-OD	I2C Data
SCL0	B-IO33-OD	SMBus Port 0 Clock (alt. func. of I2C2)
SDA0	B-IO33-OD	SMBus Port 0 Data
SCL1	B-DUAL_S5-OD	SMBus Port 1 Clock (alt. func. of I2C3)
SDA1	B-DUAL_S5-OD	SMBus Port 1 Data
HP_SCL, HP_SDA		Hotplug SMBus (I2C0)
SFP_SCL, SFP_SDA		SFP Bus (I2C1)
SPD_SCL, SPD_SDA		SPD Bus (I2C2)
BMC_SCL, BMC_SDA		BMC SMBus (I2C3)
AGPIO*_0/1		Advanced GPIO pin for interrupt, wake, or I/O; die 0/1
EGPIO*_0/1		Enhanced GPIO for I/O only; die 0/1
EGPIO*		Enhanced GPIO for I/O only; die 0
GENINT(1-2)_L	I-IO33-S	Generic Interrupt Request
GFX_CLK00P/N	B-PCIe_S5-D	PCIe Expansion 100 MHz Differential PCIe Reference Clock; die 0
GFX_CLK1(0-1)P/N	B-PCIe_S5-D	PCIe Expansion 100 MHz Differential PCIe Reference Clock; die 1
GPP_CLK0(0-3)P/N	O-PCIe_S5-D	GPP Expansion 100 MHz Differential Reference Clock; die 0
GPP_CLK1(1-3)P/N	O-PCIe_S5-D	GPP Expansion 100 MHz Differential Reference Clock; die 1
CLK_REQ(0-3)_0_L	B-IO33-S	PCIe 0 Clock Request 0-3; die 0
CLK_REQ(1-3)_1_L	B-IO33-S	PCIe 0 Clock Request 1-3; die 1
CLK_REQG_0/1_L	B-IO33-S	PCIe Graphic Slot Clock Request / 14 MHz Clock Input; die 0/1
X156M_H/L[1:0]		Differential 156.25 MHz Reference CLK Input; XGBE not supported on Socket TR4
X32K_X1/X2	I-IO18S5-S	32 kHz Clock XTAL or (X32K_X1 only) Clock Input, for the integrated RTC
X48M_X1/X2	I-IO18S5-S	48 MHz Clock XTAL or (X48M_X1 only) Clock Input, for the integrated clock generator
RTCCLK	O-IO18S5-S	32 kHz Real Time Clock Output, for a device requiring an RTC clock
KBRST_L	I-IO33-S	Keyboard Controller Reset Input (warm reset)
PWR_BTN_L	I-IO33S5	Power Button; Requests sleep state or causes wake event
PWR_GOOD	I-IO33S5	Power Good Input; Asserted when all voltages and clock inputs are within specification
PWROK	B-IO18-OD	Power OK; Asserted by the processor after all power planes are active, the system clock generators are powered up and run stably
RESET_L	B-IO18-S	Bidirectional signal that resets the processor when asserted; Normally controlled by an internal state machine but can also be asserted by a second external source
RSMRST_L	I-IO18S5-S	Resume Reset from motherboard, resets all in-processor S5 and S0 logic. Asserted on power up, deasserted when S5 power supplies are within specification.
S0A3_GPIO_0/1	B-IO33S5-S	S0A3 Indicator
SLP_S3/S5_L	O-IO33S5-S	S3/S5 Sleep State Power Plane Control Signal
SYS_RESET_L	I-IO33S5-S	System Reset Input (reset button)
WAKE_L	I-IO33S5-S	PCIe WAKE_L signal, wake system out of sleep state
BLINK	B-IO33S5-S	Blink LED S-state Indicator
FANIN(0-1)	I-IO33-S	Fan tachometer input; die 0/1
FANOUT(0-1)	O-IO33-S	Fan PWM output; die 0/1
ALERT_L	O-IO33-OD	Programmable pin that can indicate different events, including a SB-TSI interrupt
PROCHOT_L	I-IO33-OD	Asserted to force the processor into HTC-active state
SIC	B-DUAL-OD	Sideband Interface Clock
SID	B-DUAL-OD	Sideband Interface Data
THERMTRIP_L	B-IO33-OD	Temperature Trip Input/Output
DBREQ_L	I-IO18S5-S	Debug Request input to JTAG controller
TCK	I-IO18S5-S	JTAG Clock
TDI	I-IO18S5-S	JTAG Data Input
TDO	O-IO18S5-S	JTAG Data Output
TMS	I-IO18S5-S	JTAG Mode Select
TRST_L	I-IO18S5-S	JTAG Reset
TEST*		Test Pins
XTRIG_L[7:4]	B-IO18-OD	XTRIG Debug Signals
SVC_CPU, SVC_SOC	O-IO18-S	Serial VID Interface Clock for VDDCR_CPU, VDDCR_SOC regulator
SVD_CPU, SVD_SOC	B-IO18-S	Serial VID Interface Data
SVT_CPU, SVT_SOC	I-IO18-S	Serial VID Interface Telemetry
VDDIO_AUDIO	S	Azalia HD Audio power supply, 1.5 V or 1.8 V ±5%
VDDBT_RTC_G	S	Integrated Real Time Clock battery power supply, 1.5 V ±5% or 1.8 V ±5%
VDDCR_CPU	S	Supply voltage for the CPU core
VDDCR_CPU_SENSE	A	VDDCR_CPU voltage sense output, differential feedback with VSS_SENSE_A
VDDCR_SOC	S	Supply voltage for the Northbridge (integrated FCH, SATA, NBIO, SMU, DDR PHY logic)
VDDCR_SOC_SENSE	A	VDDCR_SOC voltage sense output, differential feedback with VSS_SENSE_B
VDDCR_SOC_S5	S	Always on 0.9 V ± 20 mV supply voltage for the FCH and USB PHYs
VDDCR_SOC_S5_SENSE	A	VDDCR_SOC_S5 voltage sense output, differential feedback with VSS_SENSE_B
VDDIO_MEM_S3_AB/CD	S	1.2 V ±5% supply voltage for DIMMs, PCIe PHYs, SATA PHYs, and an auxiliary supply for the DDR section of the processor
VDDIO_MEM_S3_AB_FB_H/L	A	VDDIO_MEM_S3_AB voltage differential feedback to VDDIO_MEM_S3_AB regulator
VDDIO_MEM_S3_CD_FB_H/L	A	VDDIO_MEM_S3_CD voltage differential feedback
VDD_18	S	1.8 V ±2% supply voltage
VDD_18_SENSE	A	VDD_18 voltage monitor pin, differential feedback with VSS_SENSE_A
VDD_18_S5	S	Always on 1.8 V ±5% supply voltage
VDD_18_S5_SENSE	A	VDD_18_S5 voltage monitor pin, differential feedback with VSS_SENSE_A
VDD_33	S	3.3 V ±5% supply voltage
VDD_33_SENSE	A	VDD_33 voltage monitor pin, differential feedback with VSS_SENSE_B
VDD_33_S5	S	Always on 3.3 V ±5% supply voltage
VDD_33_S5_SENSE	A	VDD_33_S5 voltage monitor pin, differential feedback with VSS_SENSE_B
VSS	S	Ground
VSS_SENSE_A	A	VSS sense pin for VDDCR_CPU, VDD_18, VDD_18_S5 regulator
VSS_SENSE_B	A	VSS sense pin for VDDCR_SOC, VDDCR_SOC_S5, VDD_33, VDD_33_S5 regulator
CORETYPE		Processor Core Type Indicator; NC = Not connected, VSS = connected to VSS on the package Processor CORETYPE SP3 Type-0 VSS SP3 Type-1/2 NC TR4/sTRX4/sWRX8 NC
SP3R1, SP3R2		Processor Family Revision Identifier (electrical keying); NC = Not connected, VSS = connected to VSS on the package Processor SP3R1 SP3R2 SP3 NC VSS TR4 NC NC sTRX4 VSS NC sWRX8 NC VSS
CPU_PRESENT_L		CPU Presence Indicator; connected to VSS on the package
SA[2:0]	I-IO18S5-S	Socket Identifier
RSVD		Reserved

Pin Types

I/O/B-PCIe/SATA/XGBE/WAFL-D	Input / Output / Bidirectional, PCIe / SATA / XGBE / WAFL Voltage Domain, Differential
I/O/B-USBS5-S/OD	Input / Output / Bidirectional, USB (VDDCR_SOC_S5) Voltage Domain, Single-Ended / Open Drain
I/O/B-IOMEM-D/S	Input / Output / Bidirectional, VDDIO_MEM_S3, Differential / Single-Ended
I/O/B-IO18-D/S/OD	Input / Output / Bidirectional, VDD_18, Differential / Single-Ended / Open Drain
I/O/B-IO18S5-D/S/OD	Input / Output / Bidirectional, VDD_18_S5, Differential / Single-Ended / Open Drain
I/O/B-IO33-D/S/OD	Input / Output / Bidirectional, VDD_33, Differential / Single-Ended / Open Drain
I/O/B-IO33S5-D/S/OD	Input / Output / Bidirectional, VDD_33_S5, Differential / Single-Ended / Open Drain
I/O/B-DUAL-S/OD	Input / Output / Bidirectional, VDD_18 or VDD_33, Single-Ended / Open Drain
I/O/B-DUAL_S5-S/OD	Input / Output / Bidirectional, VDD_18_S5 or VDD_33_S5, Single-Ended / Open Drain
O/B-AUD_S5-S	Output / Bidirectional, VDDIO_AUDIO (VDD_18_S5), Single-Ended
O/B-PCIe_S5-D	Output / Bidirectional, PCIe Clock, Differential
A	Analog
S	Supply Voltage

Socket SP3/TR4 Differences

Pin	Socket SP3	Socket TR4 a.k.a. SP3r2
E25	AGPIO23_1/SGPIO1_LOAD/MDIO3_SDA	RSVD
E28	AGPIO23_2/SGPIO2_LOAD/MDIO5_SDA	EGPIO23_1/SGPIO1_LOAD/MDIO3_SDA
CY42	AGPIO23_3/SGPIO3_LOAD/MDIO7_SDA	RSVD
D24	AGPIO40_1/SGPIO1_DATAIN/MDIO2_SDA	RSVD
D27	AGPIO40_2/SGPIO2_DATAIN/MDIO4_SDA	EGPIO40_1/SGPIO1_DATAIN/MDIO2_SDA
DB44	AGPIO40_3/SGPIO3_DATAIN/MDIO6_SDA	RSVD
D25	AGPIO9_1/SGPIO1_DATAOUT/MDIO3_SCL	RSVD
D28	AGPIO9_2/SGPIO2_DATAOUT/MDIO5_SCL	EGPIO9_1/SGPIO1_DATAOUT/MDIO3_SCL
CY41	AGPIO9_3/SGPIO3_DATAOUT/MDIO7_SCL	RSVD
E40	BP0 (Break Point Indicator, test/debug)	TEST14
E41	BP1	TEST15
D21	BP2	TEST16
C20	BP3	TEST17
C22	BP4	RSVD
C23	BP5	RSVD
misc.	G1 interface	All pins RSVD
P29	G1B_ZVSS	USB_1_3_ZVSS
misc.	G2 interface	G1 interface
misc.	G3 interface	All pins RSVD
K28	G3A_ZVSS	USB_1_2_ZVSS
DB20	GPP_CLK0BN	GPP_CLK01N
DA19	GPP_CLK0BP	GPP_CLK01P
DB18	GPP_CLK0TN	GFX_CLK00N
DA18	GPP_CLK0TP	GFX_CLK00P
B42	GPP_CLK1BN	GPP_CLK13N
A41	GPP_CLK1BP	GPP_CLK13P
C41	GPP_CLK1TN	GPP_CLK12N
C40	GPP_CLK1TP	GPP_CLK12P
A37	GPP_CLK2BN	GFX_CLK11N
B37	GPP_CLK2BP	GFX_CLK11P
C38	GPP_CLK2TN	GFX_CLK10N
C37	GPP_CLK2TP	GFX_CLK10P
DB35	GPP_CLK3BN	GPP_CLK03N
DA34	GPP_CLK3BP	GPP_CLK03P
CY36	GPP_CLK3TN	GPP_CLK02N
CY35	GPP_CLK3TP	GPP_CLK02P
misc.	Memory channel B	All pins RSVD with the following exceptions
AR40	MB0_CKE[0] (DRAM Clock Enable)	VSS
AP41	MB0_CKE[1]	VSS
AT39	MB1_CKE[0]	VSS
AR39	MB1_CKE[1]	VSS
BB43	MB_ANALOGOUT (Test pin)	USB_0_OC3_L/AGPIO24_0
AP39	MB_RESET_L	VSS
misc.	Memory channel C	All pins RSVD with the following exceptions
AN47	MC0_CKE[0]	VSS
AM48	MC0_CKE[1]	VSS
AP46	MC1_CKE[0]	VSS
AN46	MC1_CKE[1]	VSS
BB46	MC_ANALOGOUT	USB_0_OC2_L/AGPIO18_0
A47	MC_DATA[0]	GPP_CLK11P
CM46	MC_DATA[49]	FANIN0/AGPIO84_0/NMI
CT48	MC_DATA[50]	CLK_REQ0_0_L/AGPIO92_0
CT46	MC_DATA[51]	SATA_ACT_0_L/AGPIO130_0
CR47	MC_DATA[54]	CLK_REQ2_0_L/AGPIO116_0
CR46	MC_DATA[55]	CLK_REQG_0_L/OSCIN/EGPIO132_0
CV48	MC_DATA[56]	SPKR/AGPIO91
CV46	MC_DATA[57]	AZ_SDOUT
DA46	MC_DATA[58]	AZ_SYNC
DB46	MC_DATA[59]	AGPIO8
A46	MC_DATA[5]	GPP_CLK11N
DA47	MC_DATA[62]	AZ_BITCLK
CN47	MC_DQS_H[15]	FANOUT0/AGPIO85_0
CW47	MC_DQS_H[16]	AZ_SDIN2
CP46	MC_DQS_H[6]	CLK_REQ3_0_L/EGPIO131_0
CY46	MC_DQS_H[7]	AZ_RST_L
CP48	MC_DQS_L[15]	CLK_REQ1_0_L/AGPIO115_0
CY48	MC_DQS_L[16]	AZ_SDIN0
CN46	MC_DQS_L[6]	GENINT2_L/AGPIO90
CW46	MC_DQS_L[7]	AZ_SDIN1
AM46	MC_RESET_L	VSS
misc.	Memory channel D	Memory channel B
misc.	Memory channel E	Memory channel C
misc.	Memory channel F	All pins RSVD with the following exceptions
BH16	MF0_CKE[0]	VSS
BJ15	MF0_CKE[1]	VSS
BG17	MF1_CKE[0]	VSS
BH17	MF1_CKE[1]	VSS
BA13	MF_ANALOGOUT	USB_1_OC3_L/EGPIO24_1
BJ17	MF_RESET_L	VSS
misc.	Memory channel G	All pins RSVD with the following exceptions
BK9	MG0_CKE[0]	VSS
BL8	MG0_CKE[1]	VSS
BJ10	MG1_CKE[0]	VSS
BK10	MG1_CKE[1]	VSS
BA10	MG_ANALOGOUT	USB_1_OC2_L/EGPIO18_1
DB9	MG_DATA[0]	USB_0_HSD3N
CL10	MG_DATA[10]	CLK_REQG_1_L/EGPIO132_1
CL8	MG_DATA[11]	SATA_ACT_1_L/EGPIO130_1
CT10	MG_DATA[12]	CLK_REQ3_1_L/EGPIO131_1
CT9	MG_DATA[13]	EGPIO92_1
CM10	MG_DATA[14]	CLK_REQ2_1_L/EGPIO116_1
CM9	MG_DATA[15]	CLK_REQ1_1_L/EGPIO115_1
DA8	MG_DATA[1]	USB_0_HSD3P
DA10	MG_DATA[4]	USB_0_HSD2P
B10	MG_DATA[58]	USB_1_HSD2P
A10	MG_DATA[59]	USB_1_HSD2N
DB10	MG_DATA[5]	USB_0_HSD2N
F9	MG_DATA[60]	FANIN1/EGPIO84_1
F10	MG_DATA[61]	FANOUT1/EGPIO85_1
B9	MG_DATA[62]	USB_1_HSD3P
A9	MG_DATA[63]	USB_1_HSD3N
CW8	MG_DQS_H[0]	USB_0_SS_3TXP
CP10	MG_DQS_H[10]	USB_0_SS_2RXP
K9	MG_DQS_H[15]	USB_1_SS_2RXN
D9	MG_DQS_H[16]	USB_1_SS_2TXP
CN8	MG_DQS_H[1]	USB_0_SS_3RXN
J10	MG_DQS_H[6]	USB_1_SS_3RXP
C10	MG_DQS_H[7]	USB_1_SS_3TXN
CY10	MG_DQS_H[9]	USB_0_SS_2TXN
CY9	MG_DQS_L[0]	USB_0_SS_3TXN
CN10	MG_DQS_L[10]	USB_0_SS_2RXN
J8	MG_DQS_L[15]	USB_1_SS_2RXP
C8	MG_DQS_L[16]	USB_1_SS_2TXN
CP9	MG_DQS_L[1]	USB_0_SS_3RXP
K10	MG_DQS_L[6]	USB_1_SS_3RXN
D10	MG_DQS_L[7]	USB_1_SS_3TXP
CW10	MG_DQS_L[9]	USB_0_SS_2TXP
BL10	MG_RESET_L	VSS
misc.	Memory channel H	Memory channel D
misc.	P1 interface	All pins RSVD
CF29	P1A_ZVSS	USB_0_3_ZVSS
misc.	P2 interface	P1 interface
misc.	P3 interface	All pins RSVD
CT28	P3B_ZVSS	USB_0_2_ZVSS
A23	PCIE_RST1_L/EGPIO26_1	RSVD
B28	PCIE_RST2_L/EGPIO26_2	PCIE_RST1_L/EGPIO26_1
DB21	PCIE_RST3_L/EGPIO26_3	RSVD
CY44	PM_INTR_L/AGPIO89	GENINT1_L/AGPIO89
AY28	REFCLK100SSC_N	GPP_CLK00N
BA27	REFCLK100SSC_P	GPP_CLK00P
E23	S0A3_GPIO_1/AGPIO10_1/SGPIO1_CLK/MDIO2_SCL	RSVD
E26	S0A3_GPIO_2/AGPIO10_2/SGPIO2_CLK/MDIO4_SCL	S0A3_GPIO_1/EGPIO10_1/SGPIO1_CLK/MDIO2_SCL
DA43	S0A3_GPIO_3/AGPIO10_3/SGPIO3_CLK/MDIO6_SCL	RSVD
D34	TEST41[1]	RSVD
B16	TEST41[2]	TEST41[1]
CY20	TEST41[3]	RSVD
CW36	TEST47[0]	BLINK/AGPIO11
E29	TEST47[1]	RSVD
D18	TEST47[2]	TEST47[0]
CW21	TEST47[3]	TEST47[1]
AC33	TEST4[1]	RSVD
AC23	TEST4[2]	TEST4[1]
CA21	TEST4[3]	RSVD
AB34	TEST5[1]	RSVD
AB24	TEST5[2]	TEST5[1]
BY22	TEST5[3]	RSVD
DB12	USB0_0_ZVSS	USB_0_0_ZVSS
CY12	USB1_0_ZVSS	USB_0_1_ZVSS
D16	USB2_1_ZVSS	USB_1_0_ZVSS
E16	USB3_1_ZVSS	USB_1_1_ZVSS
C17	USB_1_HSD2N	USB_1_HSD0N
C16	USB_1_HSD2P	USB_1_HSD0P
B18	USB_1_HSD3N	USB_1_HSD1N
A17	USB_1_HSD3P	USB_1_HSD1P
E13	USB_1_SS_2RXN	USB_1_SS_0RXN
D13	USB_1_SS_2RXP	USB_1_SS_0RXP
A13	USB_1_SS_2TXN	USB_1_SS_0TXN
B13	USB_1_SS_2TXP	USB_1_SS_0TXP
D15	USB_1_SS_3RXN	USB_1_SS_1RXN
E14	USB_1_SS_3RXP	USB_1_SS_1RXP
B15	USB_1_SS_3TXN	USB_1_SS_1TXN
A14	USB_1_SS_3TXP	USB_1_SS_1TXP
CY15	USB_OC0_L/AGPIO16_0	USB_0_OC0_L/AGPIO16_0
CY14	USB_OC1_L/AGPIO17_0	USB_0_OC1_L/AGPIO17_0
C13	USB_OC2_L/EGPIO16_1	USB_1_OC0_L/EGPIO16_1
C14	USB_OC3_L/EGPIO17_1	USB_1_OC1_L/EGPIO17_1
misc.	VDDIO_MEM_S3_ABCD	VDDIO_MEM_S3_AB
AP38	VDDIO_MEM_S3_ABCD_FB_H	VDDIO_MEM_S3_AB_FB_H
AN38	VDDIO_MEM_S3_ABCD_FB_L	VDDIO_MEM_S3_AB_FB_L
misc.	VDDIO_MEM_S3_EFGH	VDDIO_MEM_S3_CD
BJ18	VDDIO_MEM_S3_EFGH_FB_H	VDDIO_MEM_S3_CD_FB_H
BK18	VDDIO_MEM_S3_EFGH_FB_L	VDDIO_MEM_S3_CD_FB_L
AG18	VDD_18_S5_1	VDDIO_AUDIO
F12	VSS	SP3R2
A16	WAFL1_ZVSS	RSVD
C28	WAFL2_ZVSS	WAFL1_ZVSS
DB17	WAFL3_ZVSS	RSVD
E43	X156M_H[1]	RSVD
F44	X156M_L[1]	RSVD
D19	X156M_H[2]	X156M_H[1]
E19	X156M_L[2]	X156M_L[1]
CW19	X156M_H[3]	RSVD
CV20	X156M_L[3]	RSVD

Bibliography

• David. S. (March 2018). "ISSCC 2018: AMD’s Zeppelin; Multi-chip routing and packaging"
• "Socket SP3 Design Specification", AMD Publ. #55260, Rev. 1.16, August 2020
• "SP3r2 Processor Platform Thermal Design Guide", AMD Publ. #55815, Rev. 1.03, July 2018
• "SP3r2 Processor Functional Data Sheet", AMD Publ. #55814, Rev. 1.03, June 2017
• "Electrical Data Sheet (EDS) for AMD Family 17h Models 00h-0Fh SP3r2 Processors", AMD Publ. #55443, Rev. 0.51, June 2019
• "SP3r2 Processor Infrastructure Roadmap", AMD Publ. #55557, Rev. 1.01, April 2017
• "SP3r2 Processor Motherboard Design Guide", AMD Publ. #55809, Rev. 1.03, October 2017
• "Revision Guide for AMD Family 17h Models 00h-0Fh Processors", AMD Publ. #55449, Rev. 1.19, December 2019
• Beck, Noah; White, Sean; Paraschou, Milam; Naffziger, Samuel (2018). ‘Zeppelin’: An SoC for multichip architectures. Proceedings of IEEE ISSCC 2018. pp. 40-42. doi:10.1109/ISSCC.2018.8310173

See also

• Socket AM4
• Socket SP3
• Socket sTRX4
• Socket sWRX8