1st, its unfair to take two processors versusa dualcore but single processor
2nd, opterons are meant for servers and workstation while conroe is for desktops..again unfair
3rd, opterons in the test conducted above were on 4 GB DDR2-667 SDRAM while c2E was on 2 GB DDR2-533 SDRAM.
4th, the OS for Opterons specified is XP64 while for c2e its not specified.
5th, more than a CPU comapirison, this is a system comaprision that highlight s the traits of the HP product or wutever it is
Quotes from the site that should clear the picture-:
Keeping in mind that it's a single-processor against two processors with this HP machine, the performance of the Intel Core 2 Extreme processor was remarkable, as borne out in our benchmarks. The single processor soundly beats the two dual-core Opterons in tests one through six of our After Effects suite of benchmarks, encompassing bitmap rendering, Adobe Illustrator graphics rendering, video composite and animation projects, as well as a virtual set. If you're doing a lot of these kinds of tasks in After Effects, the Intel Core 2 Extreme chip will be a faster performer for you.
Of course, testing these dual Opteron machines against a single-processor Intel Core 2 Extreme workstation is a classic apples-to-oranges comparison. But what we learned in this test is that the fastest Opteron processors are nowhere near as quick as Intel's latest Core 2 technology. Heck, just one of the dual-core Core 2 Extreme chips can beat two of the dual-core Opterons in many tests. Keeping that in mind, we'll next bring one of the newest dual Intel Xeon (Woodcrest) workstations into our Midwest Test Facility labs, where their dual/dual-core Core 2 technology has the potential to show these Opterons who's boss.
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oh, and one more interesting thing, if ya havent seen already
WOODCRESTvsOPTERON