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Socket AM3+
General Info
Designer	AMD
Introduction	March 20, 2012 (launched)
Market	Desktop
Microarchitecture	Bulldozer
TDP	220 W 220,000 mW 0.295 hp 0.22 kW
Package
Name	OPGA-940 (AM3)
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 AM3+
Type	PGA

Socket AM3+, also known as AM3b and AM3r2, was the socket for OPGA-938 and OPGA-940-packaged AMD microprocessors with an integrated DDR3 memory controller and the successor to Socket AM3. Socket AM3+ targets the desktop segment. Its contemporaries are Socket S1 for mobile processors, Socket C32 and Socket G34 for the server and workstation market. For the small form factor desktop, mobile and embedded market AMD developed package ASB2. Socket AM3 was superseded by Socket FM1 and Socket AM4.

Socket AM3+ processors use the OPGA-940 package and are compatible with the earlier Socket AM3, subject to the motherboard recognizing the CPU and the limitations of Socket AM3. The OPGA-940 package for Socket AM3/AM3+ 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 AM2 and Socket AM2+ for processors with a DDR2 memory controller.

"Socket AM3b Design Specification", AMD publication #48988, specifies another package type with 941 pins. This package is keyed to be mechanically compatible with Socket AM3+ only.

Socket AM3 processors use the OPGA-938 package and are compatible with Socket AM3+, subject to the motherboard recognizing the CPU. The OPGA-940 package for Socket AM2/AM2+ differs from the OPGA-940 package for Socket AM3/AM3+ by keying and electrically. The former carries CPUs requiring DDR2 SDRAM, the latter processors supporting DDR3 SDRAM exclusively. Socket AM2/AM2+ processors are therefore incompatible with Socket AM3+.

Package	Socket 939 939 pin holes	Socket 940 940 pin holes	Socket AM2 940 pin holes	Socket AM2+ 940 pin holes	Socket AM3 941 pin holes	Socket AM3+ 942 pin holes
OPGA-939	✓	×	×	×	×	×
CPGA-940	×	✓	×	×	×	×
OPGA-940 (S.940)	×	✓	×	×	×	×
OPGA-940 (AM2/AM2+)	×	×	✓	✓	×	×
OPGA-938	×	×	✓	✓	✓	✓
OPGA-940 (AM3/AM3+)	×	×	×	×	✓	✓
OPGA-941	×	×	×	×	×	✓

All processors for Socket AM3+ belong to AMD's Family 15h based on the Bulldozer and Piledriver microarchitectures.

Features

• 938/940-pin lidded micro pin grid array package, 1.27 mm pitch, 31 × 31 pins, 40 × 40 mm, organic substrate
• 16 bit HyperTransport 3.0 interface up to 2.2 GHz, 4400 MT/s, 8.8 Gbyte/s in each direction
• 2 × 64/72 bit DDR3 SDRAM interface up to 933 MHz, PC3-14900 (DDR3-1866), 29.9 Gbyte/s
  • Up to 4 UDIMMs or SODIMMs (2 per channel), up to 16 Gbyte per UDIMM, SEC-DED ECC
  • JEDEC 1.35V (DDR3L), 1.5V
• Up to 8 P-states; APM; ACPI C1, CC6, C1E, C2, C3, S1, S3, S5; dual power planes
• Thermal diode, overtemperature protection

Chipsets

• AMD 900 series

Processors using Socket AM3+

• AMD Opteron 32xx "Zurich", "Delhi"
• AMD FX "Zambezi", "Vishera"

	List of all Socket AM3+-based Processors
Model	Price	Process	Launched	µarch	Family	Core	C	T	Freq	Turbo	TDP
Count: 0

Package Diagram

OPGA-940 package for Socket AM3/AM3+. All dimensions in millimeters.

OPGA-938 package. All dimensions in millimeters.

OPGA-941 package. All dimensions in millimeters.

31 × 31 Pin Package Keying

Socket Outline

Socket AM3+. Note the socket cover has 942 pin holes. Pin B2 is not populated on the OPGA-938, OPGA-940, and OPGA-941 package and unconnected on the socket. All dimensions in millimeters.

Pin Map

No data available.

References

• "Socket AM3b Design Specification", AMD Publ. #48988, Rev. 3.00, April 2014
• "BIOS and Kernel Developer’s Guide (BKDG) for AMD Family 15h Models 00h-0Fh Processors", AMD Publ. #42301, Rev. 3.14, January 23, 2013
• "Family 15h Models 00h-0Fh AMD FX™-Series Processor Product Data Sheet", AMD Publ. #49686, Rev. 3.01, October 2012
• "Family 15h Models 00h-0Fh AMD Opteron™-Series Processor Product Data Sheet", AMD Publ. #49687, Rev. 3.01, October 2012
• "Revision Guide for AMD Family 15h Models 00h-0Fh Processors", AMD Publ. #48063, Rev. 3.24, September 2014

See also

• Socket AM3
• Socket AM4
• Socket S1
• Socket C32
• Socket G34
• ASB2