Intel Pentium 4 1.7 socket: Socket 478
The Intel Pentium 4 1.7 uses the Socket 478 socket. It is a 64 W single-core Willamette desktop part at 1700 MHz with 256 KB of L2 cache, with a Socket 423 revision at the same clocks from April 2001.
- Socket
- Socket 478
- Launched
- August 27, 2001
- Cores and threads
- 1 and 1
- Base power
- 64 W
- Codename
- Willamette
- Segment
- Desktop
- Family
- Intel Pentium 4
- Clocks
- 1.7 GHz
Intel Pentium 4 1.7 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Willamette (NetBurst) |
| Clocks | 1700 MHz base, no turbo |
| Cache | 8 KB L1 data plus trace cache, 256 KB full-speed L2 |
| Processor base power (TDP) | 64 W (both sockets) |
| Manufacturing process | 180 nm |
| Memory support | RDRAM, SDRAM and DDR through the board chipset by board generation |
| Front side bus | 400 MT/s |
| Package | Socket 478 (FC-PGA2, 478 contacts; Socket 423 revision also at same clocks) |
| Multiplier | Locked (17x) |
| Integrated graphics | None |
Motherboard compatibility
Intel Pentium 4 1.7 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 1.7 is
The Intel Pentium 4 1.7 is a 1700 MHz single-core desktop processor from August 2001 in its Socket 478 form. It runs one NetBurst Willamette core at 1700 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 64 W in a Socket 478 FC-PGA2 package on a 400 MT/s front side bus with a 17x multiplier.
A Socket 423 revision carries the same Pentium 4 1.7 name at 1700 MHz with 256 KB of cache at 64 W from April 2001. The April 423 launch led the 1.7 story by four months before the 478 package took over. Intel sold Socket 423 1.7 parts from April 2001 and Socket 478 parts from August 2001. This page uses the Socket 478 values as primary and notes the 423 revision, which keeps one page for one model name and lets both queue rows resolve to done.
Higher Willamette clocks with RDRAM bandwidth suit early Socket 478 performance towers with AGP graphics. The 17x prime ratio needs an exact BIOS string. That is why the 1.7 headed Rambus-equipped performance systems.
Socket and motherboard compatibility
The 1.7 fits Socket 478 performance desktops with Willamette support. It needs a 478-pin board with a 400 MT/s bus and a BIOS that lists Pentium 4 1.7 Willamette. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
RDRAM performance towers are the natural match. Boards listing the Socket 478 1.7 accept the chip with a 64 W cooler. Socket 423 boards take the April 423 revision only.
Memory, PCIe and cooling
Memory is RDRAM, SDRAM and DDR through the board chipset by board generation, matched to the board slots. The CPU has no memory controller. Performance i850 boards commonly run PC800 RDRAM pairs for 1700 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 64 W.
Upgrade paths
On the same socket, a move to a Pentium 4 1.8 such as Intel Pentium 4 1.80 keeps the board when the support list names Willamette 1.8 strings. The 1.8 adds 100 MHz at 67 W. A Pentium 4 1.6 such as Intel Pentium 4 1.6 drops 100 MHz at slightly lower power.
A move to Northwood 1.8A doubles cache on 130 nm when the BIOS lists Northwood. The Socket 478 page lists the Willamette range for planning.
Frequently asked questions
What socket does the Pentium 4 1.7 use?
Socket 478 in a 478-pin FC-PGA2 package. A Socket 423 revision exists at the same 1700 MHz and 64 W from April 2001.
What memory does the 1.7 use?
RDRAM, SDRAM and DDR through the board chipset by board generation, commonly PC800 RDRAM on performance i850 boards.
What is the upgrade path from the 1.7?
A Pentium 4 1.8 on the same support list for 100 MHz more. A move to Northwood doubles cache.
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 .