Socket AM2+

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Socket AM2+
Specifications
Type	PGA-ZIF
Chip form factors	Ceramic Pin Grid Array (CPGA) Organic Pin Grid Array (OPGA)
Contacts	940
Bus Protocol
FSB	200 MHz System clock 2.6 GHz HyperTransport
Voltage range	?
Processors	Athlon 64 Athlon 64 X2 Opteron Phenom series : Phenom X4 Phenom X3 Phenom X2
This article is part of the CPU socket series

Socket AM2+ is a CPU socket, which is the immediate successor to Socket AM2 that is currently used in several AMD processors such as Athlon 64 X2. Socket AM2+ is a mid-migration from Socket AM2 to Socket AM3 and is fully compatible with Socket AM2, so processors designed for Socket AM2 will work on Socket AM2+ motherboards and vice versa.

Socket AM2+ has some differences however that will be used in AM2+ chips, there are two main features in Socket AM2+ not in Socket AM2:

• HyperTransport 3.0 operating at up to 2.6 GHz
• Split power planes: one for the CPU cores, and the other for the Integrated Memory controller (IMC). This will improve power savings, especially with integrated graphics, if the CPU cores are in sleep mode but the IMC is still active.

AMD confirmed that AM2 processors will work in AM2+ motherboards and AM2+ processors will work on AM2 motherboards. However, due to the lack of support of HyperTransport 3.0 and separated power planes in Socket AM2 motherboards, AM2+ chips will be limited to the specifications of Socket AM2 (HyperTransport 2.0 at the speed of 1 GHz, one power plane for both Cores and IMC). AM2 chips will not benefit from faster HyperTransport and separated power planes on AM2+ motherboards as they do not support them, AM2+ motherboard then fall back to compatibility mode using AM2 specifications.

According to confirmations from AMD, Socket AM2+ will have a compatibility path with Socket AM3, AM3 processors will work in AM2+ motherboards; however, AM2+ processors will not be compatible with AM3 motherboards.

[edit] See also

• List of AMD Athlon 64 microprocessors
• List of AMD Sempron microprocessors
• http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118,00.html

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