I'm not familiar with the intel zeon chips, but the 165 is an excellent chip. I would have to say the 165 would be the better choice.
The opteron line are designed to work in a server environment, they are server chips.
You probably have to take the AMD info on the 165 to the Intel Guys for a comparason. See below
It would be approxamately a Dual Core 3800+ with 2x1024 cache!
Please DO NOT Cite the TOS, simply REPORT and DO NOT REPLY or quote it. "Life is Learning, Learning is Sharing, Sharing is Life" "Overclocking is like a drug addiction, the difference is we go broke improving our brain cells instead of destroying them!" Where in the world to buy on-line
Dual or Multi Partition and Why Everyone, GET Folding, it is important no matter how much you contribute Phenom II should be called Ph II, not a P II because it isn't an old Intel