The S1 socket is designed for mobile CPUs and has 638 contacts with a rotary lock unit. It can reach up to 3.2 GHz and supports four cores and DDR3 memory. Four processors are made for this socket, with the latest revision adding new core and memory support.
The S1 socket is an AMD® built socket designed to house central processing units (CPUs) for the mobile computing market, or laptops. There are 638 contacts included in the S1 socket and it comes with a rotary lock unit instead of a lever device like most other sockets. As of July 2011, there are four CPUs made to work with this socket, although there are more that can fit into socket S1. In terms of power, the S1 socket can reach around 1.8 to 3.2 gigahertz (GHz), with most processors clocked at 2.1 to 2.5 GHz; this socket can also support four cores simultaneously. There were four total revisions of this socket before it was retired, with the latest one adding new core and memory support.
When it comes to the main design of the S1 socket, the contacts, this socket looks like many others. There are a total of 660 contacts, but 22 of them are inserted, therefore 638 are electronically active; in the center is a small square without contacts. The actuator, or locking unit, is different from other outlets. With most sockets, there is a lever that is pulled up to unlock the CPU; with socket S1, the actuator is half turned to unlock the CPU.
Four processors have been officially created for the S1 socket. These are Athlon 64 X2®, Turion 64 MK®, Turion 64 X2® and Mobile Sempron®. All four of these processors are used in laptops rather than desktop computers.
All sockets are made to support a certain power range, which helps the CPU do its job. Socket S1 can reach up to 3.2 GHz and has a low range of 1.8 GHz. CPUs are commonly found in the middle of this range, between 2.1 and 2.5 GHz. Data rates for memory range from about 800 to 1,333 megahertz (MHz).
In total, there have been four revisions of the S1 socket, with the latest being referred to as S1g4. This revision made improvements over the others including support for extra cores, up to four separate cores for higher processing capabilities. This socket also supports double data rate type three synchronous dynamic random access memory (DDR3), which previous versions did not support. While the latest revision has many new mounts, it is physically identical to the other versions; all differences are present electronically.
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