Hardware Reference
In-Depth Information
Socket LGA1366
Socket LGA1366 (also known as Socket B) was introduced in November 2008 to support
high-end Intel Core i Series processors, including an integrated triple-channel DDR3
memory controller, but which also requires an external chipset north bridge, in this case
called an I/O Hub (IOH). Socket LGA1366 uses a land grid array format, so the pins are
on the socket, rather than the processor. Socket LGA1366 is shown in
Figure 3.12
.
Figure 3.12
Socket LGA1366 (Socket B).
Socket LGA1366 is designed to interface between a processor and an IOH, which is the
new name used for the north bridge component in supporting 5x series chipsets. The
LGA1366 interface includes the following:
•
QPI (Quick Path Interconnect)
—For data transfer between the processor and the
IOH. QPI transfers 2 bytes per cycle at either 4.8 or 6.4GHz, resulting in a bandwidth
of 9.6 or 12.8GBps.
•
DDR3 triple-channel
—For direct connection between the memory controller integ-
ratedintotheprocessorandDDR3SDRAMmodulesinatriple-channelconfiguration.
LGA1366 is designed for high-end PC, workstation, or server use. It supports configura-
tions with multiple processors.
Socket LGA1155
Socket LGA1155 (also known as
Socket H2
) was introduced in January 2011 to support
Intel's Sandy Bridge (second-generation) Core i Series processors, which now include
Turbo Boost overclocking. Socket LGA1155 uses a land grid array format, so the pins are
