Socket 478
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Socket 478, also known as mPGA478 or mPGA478B, is a 478-contact CPU socket used for Intel's Pentium 4 and Celeron series CPUs.
Socket PGA478B
Pentium 4 Willamette with Socket 478 (2001), pin side
LGA 775
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LGA 775, also known as Socket T, is an Intel desktop CPU socket. Unlike PGA CPU sockets, such as its predecessor Socket 478, LGA 775 has no socket holes; instead, it has 775 protruding pins that touch
Socket 478
…a pin grid array (PGA) interface. All later Intel desktop sockets use a land grid array (LGA) interface. Socket 478 was phased out with the launch of LGA 775 in 2004. Socket 478 was used for all Northwood Pentium 4 and Celeron processors. It supported the first Prescott Pentium 4 processors and all Willamette…
LGA 775 Socket T
A selection of LGA 775 CPUs
Intel Core 2 Duo E7500 2.93 GHz installed into LGA 775 socket
The LGA 775 contact points on the underside of a Pentium 4 Prescott CPU