Intel Pentium 4 1.80 socket: Socket 478
The Intel Pentium 4 1.80 uses the Socket 478 socket. It is a 67 W single-core Willamette desktop part at 1800 MHz with 256 KB of L2 cache for early Socket 478 towers.
- Socket
- Socket 478
- Launched
- August 1, 2001
- Cores and threads
- 1 and 1
- Base power
- 67 W
- Codename
- Willamette
- Segment
- Desktop
- Family
- Intel Pentium 4
- Clocks
- 1.8 GHz
Intel Pentium 4 1.80 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Willamette (NetBurst) |
| Clocks | 1800 MHz base, no turbo |
| Cache | 8 KB L1 data plus trace cache, 256 KB full-speed L2 |
| Processor base power (TDP) | 67 W |
| Manufacturing process | 180 nm |
| Memory support | SDRAM, DDR and RDRAM through the board chipset by board generation |
| Front side bus | 400 MT/s |
| Package | Socket 478 (FC-PGA2, 478 contacts) |
| Multiplier | Locked (18x) |
| Integrated graphics | None |
Motherboard compatibility
Intel Pentium 4 1.80 needs a motherboard with a Socket 478 socket. Chipset by chipset data for this codename is not recorded yet. See the Socket 478 chipset list and the board maker's CPU support list.
Socket 478 at a glance
| Type | PGA, 478 contacts |
|---|---|
| Package size | n/a |
| Introduced | 2001 |
| Memory | DDR through the board chipset |
| Cooler mounting holes | Board specific (Socket 478 bracket) |
What the Pentium 4 1.80 is
The Intel Pentium 4 1.80 is an 1800 MHz single-core desktop processor from August 2001 in Socket 478 form. It runs one NetBurst Willamette core at 1800 MHz with no Hyper-Threading, so 1 core gives 1 thread. Cache is 256 KB of L2 on a 180 nm process. Power is rated at 67 W in a Socket 478 FC-PGA2 package on a 400 MT/s front side bus with an 18x multiplier.
The trailing-zero 1.80 spelling marks the Socket 478 package against the plain 1.8 on Socket 423, which is why the two strings coexist in board lists at matching clocks. Intel sold the Socket 478 1.80 from August 2001 as the 423 run wound down. The chip supports MMX, SSE and SSE2.
Matching clocks on the long-lived socket suit early Socket 478 towers with a choice of SDRAM, DDR or RDRAM boards. The 67 W envelope keeps the stock 478 cooler adequate. That is why the 1.80 shipped across all three memory types.
Socket and motherboard compatibility
The 1.80 fits Socket 478 early desktops with Willamette support. It needs a 478-pin board with a 400 MT/s bus and a BIOS that lists Pentium 4 1.80 Willamette. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Early multi-memory towers are the natural match. Boards listing the 1.80 accept the chip with a 67 W cooler. Socket 423 boards take the plain 1.8 spelling only.
Memory, PCIe and cooling
Memory is SDRAM, DDR and RDRAM through the board chipset by board generation, matched to the board slots. The CPU has no memory controller. Early 478 boards commonly run PC133, DDR200 or PC800 paths for 1800 MHz parts.
A 400 MT/s front side bus ties the CPU to the chipset, while AGP and PCI hang off the chipset. No PCIe lanes originate on the die. Cooling uses the Socket 478 bracket with a cooler rated for 67 W.
Upgrade paths
On the same socket, a move to a Northwood 1.8A keeps the 1800 MHz mark while doubling cache to 512 KB at 49.6 W when the BIOS lists Northwood. A Pentium 4 1.8A such as Intel Pentium 4 1.8A is the Willamette bridge string at 69 W on the same bus.
A move to Pentium 4 2.0 Northwood adds clocks with cooler operation. The Socket 478 page lists the Willamette to Prescott range for planning.
Frequently asked questions
What socket does the Pentium 4 1.80 use?
Socket 478 in a 478-pin FC-PGA2 package. It is a 67 W Willamette desktop part at 1800 MHz.
How is the 1.80 different from the plain 1.8?
The 1.80 is Socket 478 while the plain 1.8 is Socket 423. Clocks and cache match; the package and board differ.
What memory does the 1.80 use?
SDRAM, DDR and RDRAM through the board chipset by board generation.
What is the upgrade path from the 1.80?
A Northwood 1.8A at the same clocks with double cache at lower power. A Willamette 1.8A is the bridge string at 69 W.
Sources and verification
- List of Intel Pentium 4 processors Willamette (Wikipedia)
- Socket 478 launched August 2001 (Wikipedia)
- Pentium 4 Willamette 180 nm (Wikipedia)
Facts last checked against these sources on . Page last edited on .