LGA775 Socket

The Land Grid Array (LGA) 775, also known as LGA775, and Socket T is a processor socket for Intel Pentium 4 Prescott series processors. It supports Pentium 4 3XX, 5XX, and 7XX sequence processors. This socket requires a special heatsink and cooler fan assembly, which attaches to the motherboard.

As you can see, the processor connections have a grid array design.

The yellow triangle indicates pin 1. It is not possible to install the CPU incorrectly due to the circular notches around the edges, known as alignment keys.

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