It supports dual channel DDR SDRAM memory, with 6.4 GB/s memory bandwidth. Socket 939 processors support 3DNow!, SSE2, and SSE3 (revision E or later) instruction sets. It has one HyperTransport link of 16 bit width that can run as fast as 2000 MT/s. Processors using this socket have 64KB each Level 1 instruction and data caches, and either 512KB or 1 MB Level 2 cache.
The Socket AM2, 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. Although it has 940 pins, it is incompatible with Socket 940, as the older Socket 940 does not support dual channel DDR2 RAM. DDR2 can transfer more data per clock cycle 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 [1][2], despite having over 30% greater memory bandwidth due to DDR2 support. While future samples and the final product may prove to be faster, significant gains are not expected until later revisions take advantage of the surplus bandwidth.
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). All processors on Socket AM2 were developed with 90 nm technology and include SSE3.
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.
AMD has announced that Socket AM3 processors will be able to run on Socket AM2 motherboards, but not vice-versa (ie: a Socket AM2 chip cannot run on a Socket AM3 motherboard). This is because AM3 processors will have a new memory controller supporting both DDR2 and DDR3 RAM on them, allowing backwards compatibility with AM2 motherboards, but since AM2 processors lack the new memory controller, they will not work on AM3 motherboards.
AM2 is the better chip.
2006-10-29 12:00:50
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answer #1
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answered by frankfieldsjr 2
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Well in case you don't wanna read a book about it, socket AM2 supports DDR2 memory, socket 939 supports DDR memory. That is the difference, the only difference. Sence DDR2 is faster than DDR, socket AM2 is better.
2006-10-29 14:19:07
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answer #2
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answered by mysticman44 7
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