Socket S1 (S1g4)
S1g4 is the fourth and the last revision of socket S1. The S1g4 was employed exclusively by mobile AMD microprocessors from 2010 mainstream platform, codenamed Danube. The platform and the 4th socket revision were launched in May 2010, after that the CPU lineup was refreshed twice in less than a year. The last of S1g4 microprocessors were released in January 2011. All processors from the Danube platform were based on "Champlain" core, which was a variation of desktop Regor and Propus cores with added low-power features. The "Champlain" CPUs, and consequentially socket S1g4, were succeeded in June 2011 by "Llano" microprocessors and incompatible socket FS1.
The S1g4 revision works with single-, dual-, triple- and quad-core mobile processors, operating at frequencies up to 3.2 GHz, having Thermal Design Power up to 45 Watt, and packaged in 638-pin lidless micro-PGA package. The socket supports dual-channel DDR3 memory with data rates up 1333 MHz, and one HyperTransport 3.0 link with 1.8 GHz or lower frequency.
Physically, the S1g4 is similar to previous three revisions of socket S1, but electrically it's different due to added support for DDR3 memory and faster version of HyperTransport protocol. As a result, the S1g4 is not compatible with previous generations of socket S1. All processors from Danube platform will not work in S1g1, S1g2 and S1g3 socket revisions, and S1g1/S1g2/S1g3 CPUs are not supported by socket S1 (S1g4).
The socket S1 (S1g4) has 638 pin holes. The pin holes are arranged as 26 x 26 grid, with 4 x 4 section cut from the center, and 22 pin holes plugged. As a locking mechanism, the socket uses a special actuator, that needs to be turned by half-turn to lock or release the inserted microprocessor. Visually, the S1g4 looks identical to previous revisions of the socket.
All CPUs in the table below will physically fit into the socket, but not all of them may be supported by all motherboards. If you're upgrading a processor in existing system, make sure that the CPU is compatible with your motherboard. Please see "Upgrading socket S1 (s1g4) motherboards" section below for more information.
There are no processors from other manufacturers, compatible with this socket.
Compatible package types
638-pin micro-PGA. Please note that older generations of socket S1 CPUs will fit into socket S1 (S1g4), but they are not electrically compatible with it.
Upgrading socket S1 (S1g4) motherboards
The good thing about Danube platform is that all "Champlain" processors were launched in relatively short period of time (less than a year), and all of them have the same core stepping, which means that most motherboards will support full line of S1g4 microprocessors. Although all "Champlain" CPUs are very likely to be supported by majority of motherboards, you still need to consider other factors, such as Thermal Design Power, that may limit your upgrade choices. Also, your upgrade options could be different depending on the type of applications, that you're running on your laptop:
Other upgrade considerations:
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