AMD CPU decision help.

what are you going to use or are using the computer for?

Also, since you are on an overclocking forum, do you plan on doing any OCing? If so, get the opteron. They undergo more rigorous testing because they're really made for server work. They tend to OC better, especially if you have a good week. If you're really into it, google opteron 150 stepping or something (whatever the core is, i don't know) and find out a good week and then try and find one. Those are the ones that go really high on air.

I'll tell you, if i'd have known, I would have bought an Opteron and not 4400.

First off, if your OCing the 146, with a good core will OC just as well as the 150.
Currently the SanDiego 3700+ are OCing very well!!!
The above options will save you a bunch if you intend to OC!

i would say the 4000+ looks like its cheaper, and the Opterons are more of a server type processor, since your just gaming and O.C.ing grab the 4000+ but someone in here might tell you to save even more money on this decision and buy a 3700+ Sandy and overclock it, they go up to 3.0ghz i think )

The Duke beat it to me. )

Opteron, if for no other reason, its a little more...exotic I guess. The 165 is only a dollar more than the 150. Of course the clock speed is lower, but you get dual core.

Get a 165 opteron and overclock it to speeds of FX-60. you won't regret it trust me.