LGA 771
| Release date | May 16, 2006 | 
|---|---|
| Designed by | Intel | 
| Manufactured by | Intel | 
| Type | Land Grid Array (LGA) | 
| Chip form factors | Flip chip land grid array | 
| Contacts | 771 | 
| FSB protocol | AGTL+ | 
| FSB frequency | 667 MT/s, 1066 MT/s, 1333 MT/s, 1600 MT/s | 
| Voltage range | Varies (1,3625V max) | 
| Processor dimensions | 37.5 mm x 37.5 mm | 
| Processors | Intel Celeron 445 Intel Core 2 Duo E6x05 Intel Dual-Core Xeon E/X/L 50xx–52xx Intel Quad-Core Xeon X 33xx Intel Quad-Core Xeon E/X/L 53xx–54xx Intel Core 2 Extreme QX9775 | 
| Predecessor | Socket 604 | 
| Variant | LGA 775 (Socket T) | 
| Successor | LGA 1366 | 
| Memory support | DDR2, 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.
It was succeeded by LGA 1366 for the Nehalem-based Xeon processors.