page_title: LGA 775
section_title: Improvements in heat dissipation
hierarchical_section_title: LGA 775 / Improvements in heat dissipation
caption_attribution_description: English: Intel Core 2 Duo E7500 2.93 GHz 3 MB Cache, installed on a ASRock N73PV-S motherboard
context_page_description: LGA 775, also known as Socket T, is an Intel desktop CPU socket. LGA stands for Land Grid Array. Unlike earlier common CPU sockets, such as its predecessor Socket 478, the LGA 775 has no socket holes; instead, it has 775 protruding pins which touch contact points on the underside of the processor.
  The socket had an unusually long life span, lasting 7 years until the last processors supporting it ceased production in 2011.
  The socket was superseded by the LGA 1156 and LGA 1366 sockets.
context_section_description: The force from the load plate ensures that the processor is completely level, giving the CPU's upper surface optimal contact with the heat sink or cold-water block fixed onto the top of the CPU to carry away the heat generated by the CPU. This socket also introduces a new method of connecting the heat dissipation interface to the chip surface and motherboard. With LGA 775, the heat dissipation interface is connected directly to the motherboard on four points, compared with the two connections of the Socket 370 and the "clamshell" four-point connection of the Socket 478. 
  This was done to avoid the reputed danger of the heat sinks/fans of pre-built computers falling off in transit. LGA 775 was announced to have better heat dissipation properties than the Socket 478 it was designed to replace, but the Prescott core CPUs (in their early incarnations) ran much hotter than the previous Northwood-core Pentium 4 CPUs, and this initially neutralized the benefits of better heat transfer. 
  However, modern Core 2 processors run at much lower temperatures than the Prescott CPUs they replaced.
  Processors with lower TDP and clock speeds only used Thermal Interface Compound in between the die and the integrated heat spreader (IHS), while processors with higher TDP and clock speeds wave the die soldered directly to the IHS, allowing for better heat transfer between the CPU and the integrated heat spreader.
caption: Intel Core 2 Duo E7500 2.93 GHz installed into LGA 775 socket
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