Did you check the links I posted?
2 x 2GHz K10: 4242
Comparison
Intel Xeon Octal Core 2000 MHz = 4335
http://service.futuremark.com/compare?3dm06=2982103Intel Xeon Octal Core 2660 MHz = 5662
http://service.futuremark.com/compare?3dm06=746484Intel Q6600 Quad Core 2725 MHz = 4336
http://service.futuremark.com/compare?3dm06=1837829Some weird variance in 3DMark06 CPU score though.... 4 and 8 cores very close.
X.E.D, that SPECfp_rate_2006 is a synthetic benchmark (also memory bandwidth dependant) and usually only applies to HPC applications. For server type applications, usually SPECInt_rate counts.

Added on September 30, 2007, 2:55 pmQUOTE(X.E.D @ Sep 30 2007, 12:58 PM)
But you need an uber-expensive mobo (currently only Tyan has Opteron server boards, and that LN1 from Asus)
Proof? From what I found, so far only TYAN have BIOS updates and mobos for them. Haven't seen one from ASUS...
QUOTE(X.E.D @ Sep 30 2007, 12:58 PM)
RD790 is the ultimate chip for both Opteron and Phenom (yes, 1st time that a mainstream chipset is used for both consumer and server). Current Barcelona chipsets are on Broadcom.
Proof? AFAIK all AMD server boards are using NVIDIA chipsets.
This post has been edited by lex: Sep 30 2007, 02:55 PM