32/64 bit AMD question

Tue Oct 18 18:10:21 UTC 2005

From: Russell Cook [mailto:bike_oz at yahoo.com.au] 
Sent: Tuesday, October 18, 2005 8:04 AM
To: Ubuntu Help and User Discussions
Subject: 32/64 bit AMD question

Maybe put another way, what is the performance difference in 64 bit mode
compared to 32 bit, of the 754 pin and the 939 pin AMD Athlon64's for the
same clock speed?

The funny thing is, it is exactly the memory interface that is different
between the two.  The 754 socket only does single channel memory (64 bit
path) whereas the 939 CPU's are dual channel (128 bit path).  The 64 bit
part of the processor is the same.  The performance difference will be the
memory bandwith.

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