The following Shuttle XPC Barebones are ready to support AMD Opteron processors with Socket 939.
You can find the complete list of tested hardware here: http://global.shuttle.com/support_list.jsp
AMD Opteron Sockel 939 Support (Date: 7. Dec. 2005)
|Shuttle XPC Barebone
History of the Opteron Processor
The AMD Opteron processor is the first of AMD's AMD64 (x86-64) processors, released April 22, 2003. AMD needs to differentiate between the server and the consumer platforms. Opteron is the workstation and server level processor, while Athlon64 is supposed to conquer the mass market. The AMD Opteron processor is offered in three series: the 100 series (1-way), the 200 series (1 to 2-way), and the 800 series (up to 8-way), which means that on mainboard can support 1, 2, or up to 8 Opteron processors at the same time. The original Opteron features a Socket 940 and its integrated DDR SDRAM memory controller supports registered DIMMs.
In February of 2005, AMD introduced Opterons with 90nm production and E-Stepping featuring an improved memory controller, lower power consuption, higher HyperTransport clock frequency (1000MHz), SSE3 extensions, Enhanced Virus Protection (NX Bit) and the Optimized Power Management (OPM - similar to Athlon's Cool'n'Quiet).
In May of 2005, AMD introduced its first "Dual-Core" Opteron CPU's (each physical Opteron chip contains two separate processor cores).
In August of 2005, AMD has also released a new 100 series of Socket 939 Opterons, which allows vendors to offer lower cost Opteron systems, as Socket 939 mainboards support unbuffered DIMMs instead of registered DIMMs. Before that, the Socket 939 was reserved for Athlon 64, Athlon 64 FX and Athlon 64 X2 processors, only. AMD’s move is aimed to promote dual-core Opteron processors in the entry-level server and workstation segments.
AMD Opteron Socket 939, 1 MB Cache
Further Information: http://en.wikipedia.org/wiki/Opteron