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Socket 478 information


Socket 478
Release date2001
Designed byIntel
TypePGA-ZIF
Chip form factorsFlip-chip pin grid array (FC-PGA2 or FC-PGA4)
Contacts478 (not to be confused with the newer Socket P or the similar Socket 479)
FSB protocolAGTL+
FSB frequency400 MT/s
533 MT/s
800 MT/s
Voltage range1.25 V - 1.525 V
Processor dimensions35 mm x 35 mm[1]
ProcessorsPentium 4 (1.4–3.4 GHz)
Celeron (1.7–2.8 GHz)
Celeron D (2.13–3.2 GHz)
Pentium 4 Extreme Edition (3.2–3.4 GHz)
PredecessorSocket 423
SuccessorLGA 775
This article is part of the CPU socket series
Pentium 4 Willamette with Socket 478 (2001), pin side

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 478 was launched in August 2001 in advance of the Northwood core to compete with AMD's 462-pin Socket A and their Athlon XP processors. Socket 478 was intended to be the replacement for Socket 423, a Willamette-based processor socket which was on the market for only a short time.

This was the last Intel desktop socket to use 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.

  1. ^ Intel Pentium 4 Datasheet at the Wayback Machine (archived April 9, 2006)

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