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Socket AM2
General Info
Designer	AMD
Introduction	May 23, 2006 (launched)
Market	Desktop
Microarchitecture	K8
TDP	125 W 125,000 mW 0.168 hp 0.125 kW
Package
Name	OPGA-940 AM2
Type	Organic Micro Pin Grid Array
Contacts	940
Dimension	40.0 mm 4 cm 1.575 in × 40.0 mm 4 cm 1.575 in
Pitch	1.27 mm 0.05 in
Socket
Name	Socket AM2
Type	PGA

Socket AM2 was the socket for OPGA-940 and OPGA-938-packaged AMD microprocessors with an integrated DDR2 memory controller and the successor to Socket 939. Socket AM2 targets the performance, mainstream, and value desktop segment. Its contemporaries are Socket S1 for mobile processors and Socket F for the server and workstation market. For the small form factor desktop, mobile and embedded market AMD developed package ASB1. Socket AM2 was superseded by Socket AM2+.

The OPGA-940 package for Socket AM2 is compatible with Socket AM2+. The package has the same dimensions but is mechanically, due to keying, and electrically incompatible with Socket 939 for processors with a DDR memory controller, Socket 940 for first generation Opteron processors, and Socket AM3 and AM3+ for processors with a DDR3 memory controller.

Socket AM2+ processors in the OPGA-940 package and Socket AM3 processors in the OPGA-938 package are compatible with Socket AM2, subject to the motherboard recognizing the CPU and the limitations of Socket AM2.

All processors for Socket AM2 belong to AMD's NPT Family 0Fh and use the K8 microarchitecture.

Features

• 940-pin lidded micro pin grid array package, 1.27 mm pitch, 31 × 31 pins, 40 × 40 mm, organic substrate
• 16 bit HyperTransport 1.0 interface up to 1 GHz, 2000 MT/s, 4 Gbyte/s in each direction
• 128/144 bit DDR2 SDRAM interface up to 400 MHz, PC-6400 (DDR2-800), 12.8 Gbyte/s
  • Up to 4 UDIMMs (2 per channel), up to 4 Gbyte per UDIMM, SEC-DED ECC
  • JEDEC SSTL_1.8
• P-States, ACPI C1, C1E (NPT Family 0Fh Rev. G and later processors), C2, S3, S5
• Thermal diode, overtemperature protection

Chipsets

• AMD 580, 690, 700 series
• Nvidia nForce3, nForce4, nForce 400 series, nForce 500 series, nForce 630a, GeForce 8000 series
• SiS 761GX, 771
• VIA K8T890, K8M890, K8T900

Processors using Socket AM2

• AMD Opteron codename "Santa Ana", "Budapest"
• AMD Athlon 64 FX "Windsor"
• AMD Athlon 64 X2 "Windsor", "Brisbane"
• AMD Athlon "Orleans", "Lima"
• AMD Sempron X2 "Brisbane"
• AMD Sempron "Manila", "Sparta"
• AMD Athlon Neo X2

	List of all Socket AM2-based Processors
Model	Price	Process	Launched	µarch	Family	Core	C	T	Freq	Turbo	TDP
Count: 0

Package Diagram

OPGA-940 package for Socket AM2/AM2+. All dimensions in millimeters.

Socket Outline

All dimensions in millimeters.

Pin Map

Pin Description

Signal	Description
CLKIN_H/L	200 MHz Differential PLL Reference Clock
CPU_PRESENT_L	Processor is present
DBREQ_L, DBRDY	Debug Request/Ready
HTREF0, HTREF1	HyperTransport Compensation Resistor to VSS, VLDT
L0_CADIN/OUT_H/L[15:0]	HT Link 0 Differential Command/Address/Data Input/Output
L0_CLKIN/OUT_H/L[1:0]	HT Link 0 Differential Clock Input/Output
L0_CTLIN_H/L[1:0]	HT Link 0 Differential Control Input/Output
LDTSTOP_L	HT Stop Control Input for power management and link width and frequency change
MA0/MA1/MB0/MB1_CLK_H/L[2:0]	DRAM Differential Clock
MA0/MA1/MB0/MB1_CS_L[1:0]	DRAM Chip Select
MA0/MA1/MB0/MB1_ODT[0]	DRAM Enable Pin for On Die Termination
MA/MB_ADD[15:0]	DRAM Column/Row Address
MA/MB_BANK[2:0]	DRAM Bank Address
MA/MB_CAS_L	DRAM Column Address Strobe
MA/MB_CHECK[7:0]	DRAM ECC Bits
MA/MB_CKE[1:0]	DRAM Clock Enable
MA/MB_DATA[63:0]	DRAM Data Bus
MA/MB_DM[8:0]	DRAM Data Mask
MA/MB_DQS_H/L[8:0]	DRAM Differential Data Strobe
MA/MB_RAS_L	DRAM Row Address Strobe
MA/MB_WE_L	DRAM Write Enable
M_VREF	DRAM Interface Voltage Reference
M_ZP, M_ZN	Compensation Resistor to VSS, VDDIO
PROCHOT_L	Processor in HTC-active state input/output
PSI_L	Power Status Indicator (low power state) for VDD regulator
PWROK	Voltages and CLKIN have reached specified operation
RESET_L	Processor Reset
RSVD	Reserved
SIC, SID	Sideband (APML/SBI/SMBus) Temperature Sensor Interface Clock, Data
TCK, TDI, TDO, TMS, TRST_L	JTAG interface
TEST*	Test signal
THERMDA, THERMDC	Thermal Diode Anode, Cathode
THERMTRIP_L	Thermal Sensor Trip output
VDD	Core power supply
VDD_FB_H/L	Differential feedback to VDD regulator
VDDA	Filtered PLL supply voltage
VDDIO	DRAM I/O ring power supply
VDDIO_FB_H/L	Differential feedback to VDDIO regulator
VID[5:0]	Voltage ID for VDD regulator
VLDT_A/B	HyperTransport I/O ring power supply
VSS	Ground
VTT	DRAM Termination voltage
VTT_SENSE	VTT monitor pin

References

• "Socket AM2 Design Specification", AMD Publ. #31875, Rev. 3.00, May 2008
• "BIOS and Kernel Developer’s Guide for AMD NPT Family 0Fh Processors", AMD Publ. #32559, Rev. 3.16, November 2009
• "AMD Opteron™ Processor Product Data Sheet", AMD Publ. #23932, Rev. 3.23, March 2007
• "AMD Athlon™ 64 Processor Product Data Sheet", AMD Publ. #24659, Rev. 3.18, September 2006
• "AMD Athlon™ 64 FX Product Data Sheet", AMD Publ. #30431, Rev. 3.16, September 2006
• "AMD Sempron™ Processor Product Data Sheet", AMD Publ. #31805, Rev. 3.05, September 2006
• "AMD Athlon™ 64 X2 Dual-Core Processor Product Data Sheet", AMD Publ. #33425, Rev. 3.10, January 2007
• "Revision Guide for AMD NPT Family 0Fh Processors", AMD Publ. #33610, Rev. 3.48, December 2011

See also

• Socket 939
• Socket AM2+
• Socket AM3
• Socket AM3+
• Socket S1
• Socket F
• ASB1