Scott Marlowe wrote:
The DDR3 Nehalem and DDR2 AMD are both actually pretty close in real
world use on 4 or more socket machines.  Most benchmarks on memory
bandwidth give no huge advantage to either one or the other.  They
both max out at about 25GB/s.
The most fair comparison I've seen so far is http://www.advancedclustering.com/company-blog/stream-benchmarking.html which puts the faster Intel solutions at 37GB/s, while the Opterons bog down at 20GB/s. That matches my own tests pretty well too--Intel's got at least a 50% lead here in many cases.

--
Greg Smith    2ndQuadrant   Baltimore, MD
PostgreSQL Training, Services and Support
g...@2ndquadrant.com  www.2ndQuadrant.com


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