LGA 771

Socket J (LGA 771)
Release dateMay 16, 2006 (2006-05-16)
Designed byIntel
Manufactured byIntel
TypeLand Grid Array (LGA)
Chip form factorsFlip chip land grid array
Contacts771
FSB protocolAGTL+
FSB frequency667 MT/s, 1066 MT/s, 1333 MT/s, 1600 MT/s
Voltage rangeVaries (1.3625V max)
Processor dimensions37.5 × 37.5 mm
ProcessorsIntel Celeron 445 (1.87 GHz)
Intel Core 2 Duo E6x05 (1.87 - 2.13 GHz)
Intel Dual-Core Xeon E/X/L 50xx–52xx (1.60 - 3.73 GHz)
Intel Quad-Core Xeon X 33xx (2.50 - 2.83 GHz)
Intel Quad-Core Xeon E/X/L 53xx–54xx (1.60 - 3.40 GHz)
Intel Core 2 Extreme QX9775 (3.20 GHz)
PredecessorSocket 604
VariantLGA 775 (Socket T)
SuccessorLGA 1366
Memory supportDDR2, DDR3

This article is part of the CPU socket series

LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006. It is used in Intel Core microarchitecture and NetBurst microarchitecture (Dempsey) based DP-capable server processors, the Dual-Core Xeon is codenamed Dempsey, Woodcrest, and Wolfdale and the Quad-Core processors Clovertown, Harpertown, and Yorkfield-CL. It is also used for the Core 2 Extreme QX9775, and blade servers designated under Conroe-CL, and was discontinued around the same time the last processors supporting this socket ceased production in 2011, in favor of its successor, LGA 1366, for the Nehalem-based Xeon processors.