Editing Opteron (section)

=== CPU socket models ===

==== Socket 939 ====
AMD released [[Socket 939]] Opterons, reducing the cost of motherboards for low-end servers and workstations. Except for the fact they have 1&nbsp;[[megabyte|MB]] L2 cache (versus 512&nbsp;[[kilobyte|KB]] for the Athlon 64) the Socket 939 Opterons are identical to the San Diego and Toledo core [[Athlon 64]]s, but are run at lower clock speeds than the cores are capable of, making them more stable.

==== Socket AM2 ====
Socket AM2 Opterons are available for servers that only have a single-chip setup. Codenamed Santa Ana, rev. F dual core AM2 Opterons feature 2 × 1&nbsp;MB L2 cache, unlike the majority of their [[Athlon 64 X2]] cousins which feature 2 × 512&nbsp;KB L2 cache. These CPUs are given model numbers ranging from 1210 to 1224.

==== Socket AM2+ ====
AMD introduced three quad-core Opterons on Socket AM2+ for single-CPU servers in 2007. These CPUs are produced on a 65&nbsp;nm manufacturing process and are similar to the ''Agena'' [[AMD Phenom|Phenom]] X4 CPUs. The Socket AM2+ quad-core Opterons are code-named "Budapest". The Socket AM2+ Opterons carry model numbers of 1352 (2.10&nbsp;GHz), 1354 (2.20&nbsp;GHz), and 1356 (2.30&nbsp;GHz).

==== Socket AM3 ====
AMD introduced three quad-core Opterons on Socket AM3 for single-CPU servers in 2009. These CPUs are produced on a 45&nbsp;nm manufacturing process and are similar to the ''Deneb''-based Phenom II X4 CPUs. The Socket AM3 quad-core Opterons are code-named "Suzuka". These CPUs carry model numbers of 1381 (2.50&nbsp;GHz), 1385 (2.70&nbsp;GHz), and 1389 (2.90&nbsp;GHz).

==== Socket AM3+ ====
[[Socket AM3+]] was introduced in 2011 and is a modification of AM3 for the [[Bulldozer (processor)|Bulldozer]] microarchitecture. Opteron CPUs in the AM3+ package are named Opteron 3xxx.

==== Socket F ====
[[Socket F]] ([[land grid array|LGA]] 1207 contacts) is AMD’s second generation of Opteron socket. This socket supports processors such as the Santa Rosa, Barcelona, Shanghai, and Istanbul codenamed processors. the "lidded [[land grid array]]" socket adds support for [[DDR2 SDRAM]] and improved [[HyperTransport]] version 3 connectivity. Physically the socket and processor package are nearly identical, although not generally compatible with [[socket 1207 FX]].

==== Socket G34 ====
[[Socket G34]] (LGA 1944 contacts) is one of the third generation of Opteron sockets, along with [[Socket C32]]. This socket supports ''Magny-Cours'' Opteron 6100, Bulldozer-based ''Interlagos'' Opteron 6200, and Piledriver-based "Abu Dhabi" Opteron 6300 series processors. This socket supports four channels of [[DDR3 SDRAM]] (two per CPU die). Unlike previous multi-CPU Opteron sockets, Socket G34 CPUs will function with unbuffered ECC or non-ECC RAM in addition to the traditional registered ECC RAM.

==== Socket C32 ====
[[Socket C32]] (LGA 1207 contacts) is the other member of the third generation of Opteron sockets. This socket is physically similar to [[Socket F]] but is not compatible with Socket F CPUs. Socket C32 uses DDR3 SDRAM and is keyed differently so as to prevent the insertion of Socket F CPUs that can use only DDR2 SDRAM. Like Socket G34, Socket C32 CPUs will be able to use unbuffered ECC or non-ECC RAM in addition to registered ECC SDRAM.

===== Micro-architecture update =====
The Opteron line saw an update with the implementation of the [[AMD K10]] microarchitecture. New processors, launched in the third quarter of 2007 (codename ''Barcelona''), incorporate a variety of improvements, particularly in memory prefetching, speculative loads, [[SIMD]] execution and [[branch predictor|branch prediction]], yielding an appreciable performance improvement over K8-based Opterons, within the same power envelope.<ref>{{cite news |last=Merritt |first=Rick |title=AMD tips quad-core performance |url=http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=197700269 |publisher=EETimes.com |access-date=March 16, 2007}}</ref>

In 2007 AMD introduced a scheme to characterize the power consumption of new processors under "average" daily usage, named [[average CPU power]] (ACP).

==== Socket FT3 ====
The Opteron X1150 and Opteron X2150 APU are used with the BGA-769 or [[Socket FT3]].<ref>{{cite web |title=AMD Opteron X2150 APU |url=https://www.amd.com/en-us/products/server/opteron-x/x2150#specs |access-date=October 19, 2014}}</ref>