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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:
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
The Socket AM2, renamed from Socket M2 (to prevent using the same name as Cyrix MII processors), is a CPU socket designed by AMD for desktop processors, including the performance, mainstream and value segments. It was released on May 23, 2006, as a replacement for Socket 939 & Socket 754.
Contents [hide]
1 Technology
2 Successors
2.1 Socket AM2+
2.2 Socket AM3
3 Supported chipsets
4 See also
5 External links
[edit] Technology
AM2 processors are incompatible with 939 motherboards and vice versa, and although it has 940 pins, it is incompatible with Socket 940[1]. DDR2 can transfer more data per clock cycle, but suffers from higher latencies, while drawing less power than DDR memory, which the previous Socket 939 supported. AnandTech reported that Socket AM2 system performance was 0-7% faster than Socket 939 equivalents, with most applications about 2% faster [2][3], despite having over 30% greater memory bandwidth due to DDR2 support.
The first processor cores to support socket AM2 are the single-core Orleans (Athlon 64) and Manila (Sempron), and the dual-core Windsor (Athlon 64 X2 and Athlon 64 FX). Most processors on Socket AM2 include SSE3 instructions and were developed with 90 nanometer technology. Recent models feature 65 nanometer technology (to compete with Intel and their 65nm cpus).
Socket AM2 will support AMD Phenom processors.
Socket AM2 is a part of AMD's next generation of CPU sockets, along with Socket F for servers and Socket S1 for mobile computing.
There are also single-socket Opteron processors available for AM2.[4]
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. |
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