Socket 478 socket: CPUs, chipsets and cooler fit
Socket 478 is the Intel micro pin grid array socket that carried Pentium 4 and Celeron processors from 2001. It holds 478 contacts for mPGA packages. Intel positioned it for NetBurst desktops with DDR memory, succeeding Socket 423, with LGA 775 as its successor.
Quick facts
| Maker | Intel |
|---|---|
| Package type | PGA |
| Contacts | 478 |
| Package size | n/a |
| Introduced | 2001 |
| Status | Legacy |
| Memory | DDR through the board chipset |
| PCIe from the CPU | Front side bus to the chipset; AGP or PCIe slots hang off the board chipset |
| Cooler mounting holes | Board specific (Socket 478 bracket) |
| Replaces | Socket 423 |
| Replaced by | LGA 775 |
Overview
The socket matters for this batch because the Celeron D 350 is a 3.2 GHz Prescott part with 256 KB of L2 cache at 73 W in the 478-pin package. It runs on a 533 MT/s front side bus with DDR slots on boards that list Prescott Celeron parts.
Memory is DDR through the board chipset. Cooling uses the Socket 478 retention bracket, so a processor swap stays within the thermal design the board was qualified for.
Processor generations
| Codename | Marketing name | Years | Notes |
|---|---|---|---|
| Willamette | Pentium 4 Willamette | 2001 | 180 nm single cores with 256 KB of L2 cache on a 400 MT/s bus, including the 1.4 GHz part at 55.3 W and the 1.5 GHz part at 57.9 W in Socket 478 from August 2001. |
| Prescott | Celeron D Prescott | 2004 to 2005 | 90 nm single cores with 256 KB of L2 cache, including the 3.2 GHz 350 at 73 W from June 2005. |
| Northwood | Pentium 4 HT Northwood | 2003 to 2004 | 130 nm single cores with 512 KB of L2 cache and Hyper-Threading, including the 3.4 GHz HT 3.40 at 89 W from February 2004. |
| Gallatin | Pentium 4 EE Gallatin | 2003 to 2004 | 130 nm single cores with 512 KB of L2 cache plus 2 MB of L3 cache and Hyper-Threading, including the 3.4 GHz EE 3.40 at 102.9 W from February 2004. |
Who Socket 478 serves
Socket 478 fits DDR towers that pair a Prescott Celeron D with a board that lists the exact model. The 350 at 3.2 GHz suits value towers at 73 W. Every installation needs the board maker CPU list because late Prescott support is board specific.
Memory and cooling
Memory on Socket 478 is DDR through the board chipset. Expansion hangs off the board chipset because these CPUs provide no PCIe lanes. Cooling uses the Socket 478 bracket for the exact TDP.
CPUs on Socket 478
63 processor pages in the database, newest first.
| Processor | Cores / threads | Base / boost | TDP | Launched |
|---|---|---|---|---|
| Intel Celeron D 350 | 1 / 1 | 3.2 GHz | 73 W | Jun 2005 |
| Intel Mobile Pentium 4 HT 552 | 1 / 2 | 3.47 GHz | 88 W | Jan 2005 |
| Intel Mobile Pentium 4 HT 548 | 1 / 2 | 3.33 GHz | 88 W | Sep 2004 |
| Intel Pentium 4 HT 3.6E | 1 / 2 | 3.6 GHz | 115 W | Aug 2004 |
| Intel Celeron D 335 | 1 / 1 | 2.8 GHz | 84 W | Jun 2004 |
| Intel Mobile Pentium 4 HT 518 | 1 / 2 | 2.8 GHz | 88 W | Jun 2004 |
| Intel Mobile Pentium 4 HT 532 | 1 / 2 | 3.07 GHz | 88 W | Jun 2004 |
| Intel Mobile Pentium 4 HT 538 | 1 / 2 | 3.2 GHz | 88 W | Jun 2004 |
| Intel Pentium 4 HT 3.4E | 1 / 2 | 3.4 GHz | 115 W | Apr 2004 |
| Intel Pentium 4 2.40 | 1 / 1 | 2.4 GHz | 89 W | Mar 2004 |
| Intel Pentium 4 HT 2.8E | 1 / 2 | 2.8 GHz | 89 W | Feb 2004 |
| Intel Pentium 4 HT 3.0E | 1 / 2 | 3.0 GHz | 89 W | Feb 2004 |
| Intel Pentium 4 HT 3.2E | 1 / 2 | 3.2 GHz | 103 W | Feb 2004 |
| Intel Pentium 4 HT 3.40 | 1 / 2 | 3.4 GHz | 89 W | Feb 2004 |
| Intel Pentium 4 HT Extreme Edition 3.40 | 1 / 2 | 3.4 GHz | 102.9 W | Feb 2004 |
| Intel Celeron 2.80 | 1 / 1 | 2.8 GHz | 68.4 W | Nov 2003 |
| Intel Pentium 4 HT Extreme Edition 3.20 | 1 / 2 | 3.2 GHz | 92.1 W | Nov 2003 |
| Intel Celeron 2.70 | 1 / 1 | 2.7 GHz | 66.8 W | Sep 2003 |
| Intel Mobile Pentium 4 HT 2.66 | 1 / 2 | 2.67 GHz | 66.1 W | Sep 2003 |
| Intel Mobile Pentium 4 HT 2.80 | 1 / 2 | 2.8 GHz | 68.4 W | Sep 2003 |
| Intel Mobile Pentium 4 HT 3.06 | 1 / 2 | 3.07 GHz | 70 W | Sep 2003 |
| Intel Mobile Pentium 4 HT 3.20 | 1 / 2 | 3.2 GHz | 76 W | Sep 2003 |
| Intel Celeron 2.60 | 1 / 1 | 2.6 GHz | 62.6 W | Jun 2003 |
| Intel Mobile Pentium 4 2.40 | 1 / 1 | 2.4 GHz | 59.8 W | Jun 2003 |
| Intel Mobile Pentium 4 2.66 | 1 / 1 | 2.67 GHz | 66.1 W | Jun 2003 |
| Intel Mobile Pentium 4 2.80 | 1 / 1 | 2.8 GHz | 68.4 W | Jun 2003 |
| Intel Mobile Pentium 4 3.06 | 1 / 1 | 3.07 GHz | 70 W | Jun 2003 |
| Intel Pentium 4 HT 3.20 | 1 / 2 | 3.2 GHz | 82 W | Jun 2003 |
| Intel Pentium 4-M 2.60 | 1 / 1 | 2.6 GHz | n/a | Jun 2003 |
| Intel Pentium 4 HT 2.40 | 1 / 2 | 2.4 GHz | 66.2 W | May 2003 |
| Intel Pentium 4 HT 2.60 | 1 / 2 | 2.6 GHz | 69 W | May 2003 |
| Intel Pentium 4 HT 2.80 | 1 / 2 | 2.8 GHz | 69.7 W | May 2003 |
| Intel Pentium 4 HT 3.00 | 1 / 2 | 3.0 GHz | 81.9 W | Apr 2003 |
| Intel Pentium 4-M 2.50 | 1 / 1 | 2.5 GHz | n/a | Apr 2003 |
| Intel Celeron 2.30 | 1 / 1 | 2.3 GHz | 58.3 W | Mar 2003 |
| Intel Celeron 2.40 | 1 / 1 | 2.4 GHz | 59.8 W | Mar 2003 |
| Intel Pentium 4-M 2.40 | 1 / 1 | 2.4 GHz | n/a | Jan 2003 |
| Intel Celeron 2.10 | 1 / 1 | 2.1 GHz | 73 W | Nov 2002 |
| Intel Pentium 4 HT 3.06 | 1 / 2 | 3.06 GHz | 81.8 W | Nov 2002 |
| Intel Celeron 2.0 | 1 / 1 | 2.0 GHz | 73 W | Sep 2002 |
| Intel Pentium 4-M 2.20 | 1 / 1 | 2.2 GHz | 35 W | Sep 2002 |
| Intel Pentium 4 2.60 | 1 / 1 | 2.6 GHz | 62.6 W | Aug 2002 |
| Intel Pentium 4 2.66 | 1 / 1 | 2.66 GHz | 66.1 W | Aug 2002 |
| Intel Pentium 4 2.80 | 1 / 1 | 2.79 GHz | 68.4 W | Aug 2002 |
| Intel Pentium 4-M 1.90 | 1 / 1 | 1.9 GHz | 32 W | Jun 2002 |
| Intel Pentium 4-M 2.00 | 1 / 1 | 2.0 GHz | 32 W | Jun 2002 |
| Intel Pentium 4 2.26 | 1 / 1 | 2.26 GHz | 56 W | May 2002 |
| Intel Pentium 4 2.53 | 1 / 1 | 2.53 GHz | 61.5 W | May 2002 |
| Intel Pentium 4 2.4 | 1 / 1 | 2.4 GHz | 59.8 W | Apr 2002 |
| Intel Pentium 4-M 1.40 | 1 / 1 | 1.4 GHz | 25.8 W | Apr 2002 |
| Intel Pentium 4-M 1.50 | 1 / 1 | 1.5 GHz | n/a | Apr 2002 |
| Intel Pentium 4-M 1.80 | 1 / 1 | 1.8 GHz | 30 W | Apr 2002 |
| Intel Pentium 4-M 1.60 | 1 / 1 | 1.6 GHz | 30 W | Mar 2002 |
| Intel Pentium 4-M 1.70 | 1 / 1 | 1.7 GHz | 30 W | Mar 2002 |
| Intel Pentium 4 2.2 | 1 / 1 | 2.2 GHz | 55.1 W | Feb 2002 |
| Intel Pentium 4 2.0 | 1 / 1 | 2.0 GHz | 52.4 W | Jan 2002 |
| Intel Pentium 4 1.4 | 1 / 1 | 1.4 GHz | 55 W | Aug 2001 |
| Intel Pentium 4 1.5 | 1 / 1 | 1.5 GHz | 58 W | Aug 2001 |
| Intel Pentium 4 1.6 | 1 / 1 | 1.6 GHz | 61 W | Aug 2001 |
| Intel Pentium 4 1.7 | 1 / 1 | 1.7 GHz | 64 W | Aug 2001 |
| Intel Pentium 4 1.80 | 1 / 1 | 1.8 GHz | 67 W | Aug 2001 |
| Intel Pentium 4 1.9 | 1 / 1 | 1.9 GHz | 69 W | Aug 2001 |
| Intel Pentium 4 1.8A | 1 / 1 | 1.8 GHz | 69 W | Jul 2001 |
Frequently asked questions
Which processors fit Socket 478?
Prescott Celeron D parts in 478-pin packages, including the 3.2 GHz 350 with 256 KB of L2 cache at 73 W covered here.
Is Socket 478 the same as LGA 775?
No. Socket 478 has 478 contacts in a pin grid array while LGA 775 has 775 lands with pins in the socket. Forcing a chip can damage the board.
What memory does Socket 478 use?
DDR memory through the board chipset. A move to DDR2 means a move to LGA 775 with a new board.
How many PCIe lanes does Socket 478 provide?
No lanes come from these CPUs. A front side bus ties the CPU to the board chipset at 533 MT/s on Celeron D parts, while AGP or PCIe slots hang off the chipset.
Sources and verification
Facts last checked against these sources on . Page last edited on .