Socket G2 / Socket rPGA988B
Socket G2, also called rPGA988B, was introduced in January 2011 as a socket for the second-generation Core microprocessors. Initially used for dual- and quad-core Core-branded CPUs, the rPGA988B was later utilized for mobile Celeron and Pentium processors. Currently (September 2011), the socket works with single-, dual- and quad-core mobile chips with Thermal Design Power ranging from 35 Watt to 55 Watt, and operating at frequencies up to 2.8 GHz. The socket supports dual-channel DDR3 memory with data rates 1066 MHz for budget chips, 1333 MHz for mis-class models and 1600 MHz for high-performance CPUs. It also supports Direct Media Interface, that provides twice as much bandwidth as DMI on previous generation of Intel Nehalem and Westmere mobile processors.
The socket rPGA988B has 988 pin holes, arranged as 35 x 36 grid, with two plugged pin holes at one of the corners of the grid, and with 18 x 15 section removed from the center of the grid. The socket uses an actuator to lock or release the processor. To lock the CPU the actuator must be turned clockwise, and to release the chip the actuator needs to be turned counter clockwise.
Sockets G1 and G2 have the same number of pin holes, but they are not compatible with each other due to different position of one pin hole.
Although all microprocessors from the table below physically fit into the socket, not all of them may be supported by your motherboard. For that reason before upgrading to any model from this list below, please make sure that the CPU is compatible with the motherboard. See "Upgrading socket G2 motherboards" section further below for tips on how to determine which processors are supported by specific motherboard.
There are no CPUs from other manufacturers compatible with socket G2.
Socket 989 / rPGA989 (for motherboards supporting second-generation Core microprocessors, mobile Celerons and Pentiums, based on Sandy Bridge microarchitecture).
Compatible package types
Upgrading rPGA988B motherboards
To determine which processors are supported by your laptop or computer you will need to find out make and model of your system, and then search on manufacturer's website for upgrade recommendations for that make and model. Most manufacturers don't publish CPU support information for notebooks and OEM systems, but you may be able to find upgrade recommendations in product support forums on manufacturer website, or in forums on dedicated computer hardware sites. In addition to that, try to send an e-mail to manufacturer's customer support, or post in computer-related forums, although don't expect that you will get many responses. If this doesn't work then use CPU-Z or similar program to determine chipset type in your notebook, and look for CPU upgrade information for the chipset. CPU support data for Intel chipsets can be found on CPU-Upgrade.com in Intel chipsets section, or on Intel website. Be careful with this method as it's is less reliable.
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