Linked by Thom Holwerda on Mon 9th Feb 2009 23:25 UTC
AMD "The ink is barely dry on AMD's Socket AM2 Phenom II launch, but Sunnyvale is making up for lost time when it comes to debuting new products. On Monday, February 9, the CPU manufacturer released a total of five new Phenom II-class processors, all of which are classified as Socket AM3 parts. Unlike Socket AM2 chips, which are only compatible with DDR2 memory, Socket AM3 CPUs can use either RAM standard and drop neatly into either motherboard. The backwards-compatibility of Socket AM3 chips should make them quite attractive to anyone upgrading an older Athlon 64 X2 or even a Phenom part; AMD's Phenom II (aka Deneb) offers a number of significant performance and thermal improvements over the ill-fated Phenom I. Remember that backward compatibility only goes one direction - AM2+ processors will not work in AM3 boards."
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RE: Whooopie!
by GatoLoko on Wed 11th Feb 2009 01:13 UTC in reply to "Whooopie!"
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AM3 supports DDR3 while AM2 doesn't.

The memory controller is now inside the CPU instead the chipset. To support DDR3 the controller needs more "wires" than to support DDR2, so the socket needs more contacts.

Socket7 and Socket A were designed to work with the memory controller in the chipset instead the CPU, with a frontside bus instead hipertransport links, single data rate instead double data rate ....

<sarcasm>Why can't we go back to 8bit processors for new chips?</sarcasm>

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