Editing Socket 478 (section)

{{Short description|Processor socket made by Intel}}
{{CPU socket|
name = Socket 478 |
image = [[File:Socket PGA478B.jpg|300px]] |
formfactors = [[Flip-chip pin grid array]] (FC-PGA2 or FC-PGA4) |
contacts = 478 (not to be confused with the newer [[Socket P]] or the similar [[Socket 479]])|
type = PGA-ZIF |
protocol = AGTL+ |
fsb = 400 MT/s<br>533 MT/s<br>800 MT/s |
voltage =1.25 V - 1.525 V  |
dimensions = 35 mm x 35 mm<ref>{{webarchive |url=https://web.archive.org/web/20060409050735/http://www.intel.com:80/design/pentium4/datashts/24988703.pdf |date=April 09, 2006 |title=Intel Pentium 4 Datasheet }}</ref> |
processors = [[Pentium 4]] (1.4–3.4 GHz)<br>[[Celeron]] (1.7–2.8 GHz)<br> [[Celeron#Prescott-256|Celeron D]] (2.13–3.2 GHz)<br>[[Pentium_4#Gallatin (Extreme_Edition)|Pentium 4 Extreme Edition]] (3.2–3.4 GHz)
| predecessor = [[Socket 423]]
| successor   = [[LGA 775]]
|release-date=2001|designed-by=Intel}}

[[File:Pentium 4 - SL5TK - pin side-3057.jpg|thumb|right|250px|[[Pentium 4]] [[Pentium_4#Willamette|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 [[Central processing unit|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 ([[Pin grid array|PGA]]) interface. All later Intel desktop sockets use a land grid array ([[Land grid array|LGA]]) interface.

Socket 478 was phased out with the launch of [[LGA 775]] in 2004.