Socket 478
 | |
| Release date | 2001 |
|---|---|
| Designed by | Intel |
| Type | PGA-ZIF |
| Chip form factors | 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 and Socket M) |
| FSB protocol | AGTL+ |
| FSB frequency | 400 MT/s 533 MT/s 800 MT/s |
| Voltage range | 1.25 V - 1.525 V |
| Processor dimensions | 35 mm × 35 mm |
| Processors | Pentium 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) |
| Predecessor | Socket 423 |
| Successor | LGA 775 |
This article is part of the CPU socket series | |
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 marked the beginning of Intel 64 and NX bit with support on some later processors. Intel discontinued Socket 478 in favor of LGA 775 with the launch of the 64-bit version of its 90 nm "Prescott"-based Pentium 4 HT and Celeron D in 2004.