Socket FM2

Socket FM2+ (FM2b, FM2r2) is a zero insertion force CPU socket designed by AMD for their desktop "Kaveri" APUs (Steamroller-based) and Godavari APUs (Steamroller-based) to connect to the motherboard. The FM2+ has a slightly different pin configuration to Socket FM2 with two additional pin sockets. Socket FM2+ APUs are not compatible with Socket FM2 motherboards due to the aforementioned additional pins. However, socket FM2 APUs such as "Richland" and "Trinity" are compatible with the FM2+ socket. * ECC DIMMs are supported on Socket FP3 but not supported on the Socket FM2+ package. * There are 3 PCI Express cores: one 2 ×16 core and two 5 ×8 cores. There are 8 configurable ports, which can be divided into 2 groups: ** Gfx-group: contains 2 ×8 ports. Each port can be limited to lower link widths for applications that require fewer lanes. Additionally, the two ports can be combined to create a single ×16 link. ** GPP-group: contains 1 ×4 UMI and 5 General Purpose Ports (GPP). All PCIe links are capable of supporting PCIe 2.0 data rates. In addition, the Gfx link is capable of supporting PCIe 3.x data rate. For available chipsets consult Fusion controller hubs (FCH). Its mobile counterpart is Socket FP3 (μBGA906).

Socket FM2 is a CPU socket used by AMD's desktop Trinity and Richland APUs to connect to the motherboard as well as Athlon X2 and Athlon X4 processors based on them. FM2 was launched on September 27, 2012. Motherboards which feature the at the time new FM2 CPU socket also utilize AMD's at the time new A85X chipset. The socket is very similar to FM1, based on a 31 × 31 grid of pins with a 5 × 7 central void, three pins missing from each corner, and a few additional key pins missing. Compared to Socket FM1, two key pins were moved, and one more is removed, leaving 904 pins. For available chipsets consult Fusion controller hubs (FCH). Steamroller-based "Kaveri" APUs are not supported, see Socket FM2+ (FM2r2) and Socket FP3 (BGA-???).

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