Socket 478
Socket 478, also known as mPGA478 or mPGA478B, is a 478-contact CPU socket used for Intel's Pentium 4 and Celeron series CPUs.
| 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) |
| 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 x 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 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.
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