Intel Pentium 4 HT 3.00 socket: Socket 478
The Intel Pentium 4 HT 3.00 uses the Socket 478 socket. It is an 81.9 W single-core Northwood desktop part at 3 GHz with Hyper-Threading and 512 KB of L2 cache for Socket 478 towers.
- Socket
- Socket 478
- Launched
- April 2003
- Cores and threads
- 1 and 2
- Base power
- 81.9 W
- Codename
- Northwood
- Segment
- Desktop
- Family
- Intel Pentium 4 HT
- Clocks
- 3.0 GHz
Intel Pentium 4 HT 3.00 specifications
| Cores | 1 |
|---|---|
| Threads | 2 |
| Core architecture | Northwood cores on 130 nm |
| Clocks | 3 GHz (no turbo) |
| Cache | 512 KB L2 |
| Processor base power (TDP) | 81.9 W |
| Manufacturing process | 130 nm |
| Memory support | DDR through the board chipset |
| Front side bus | 800 MT/s |
| PCI Express | AGP from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked (15x) |
| Package | Socket 478 (478-pin mPGA) |
Motherboard compatibility
Intel Pentium 4 HT 3.00 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 HT 3.00 is
The Intel Pentium 4 HT 3.00 is a 3 GHz single-core desktop processor with Hyper-Threading from April 2003. It runs one NetBurst Northwood core at 3 GHz with no turbo, so 1 core gives 2 threads. Cache is 512 KB of L2 on a 130 nm process. Power is rated at 81.9 W in a Socket 478 package with part numbers SL6WU and SL6WK. The cpu_list 82 W value matches the table 81.9 W after rounding, and the table value is used here.
The 3.00 uses an 800 MT/s front side bus with a 15x multiplier at 1.475 V to 1.55 V. Intel sold it at 417 dollars in April 2003 as the first 3 GHz desktop with Hyper-Threading. The chip supports MMX, SSE and SSE2 with Hyper-Threading. Prescott 3.0E parts at the same 3 GHz offer 1 MB of cache on 90 nm as a successor with similar power, so cache and process separate the generations at identical frequency.
Milestone clocks with Hyper-Threading made the 3.00 a press favorite. The 3 GHz mark with two threads gave single-core towers noticeably smoother multitasking than 2.8 GHz parts. That is why the 3.00 cost more than the 2.80 despite sharing the 512 KB cache.
Socket and motherboard compatibility
The Pentium 4 HT 3.00 fits Socket 478 desktops with an 800 MT/s bus and Northwood HT support. It needs a 478-pin board with 81.9 W power delivery. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Performance DDR towers are the natural match. Intel 875 boards accept the chip with an 81.9 W cooler. Boards limited to slower Northwood HT parts need a power check.
Memory, PCIe and cooling
Memory is DDR through the board chipset. The board sets speed and capacity.
An 800 MT/s bus ties the CPU to the chipset, while AGP 8x handles graphics. No PCIe lanes originate on the die. Cooling uses the Socket 478 bracket with an 81.9 W heatsink. Fresh paste suits the higher power.
Upgrade paths
On Socket 478 the steps are the Pentium 4 HT 3.20 and 3.40 Northwood parts. Prescott 3.0E offers more cache as an alternative. Beyond Socket 478 a move to LGA 775 needs a new board. The 3.00 lifts with the lever, so swaps need no solder work.
Frequently asked questions
What socket does the Pentium 4 HT 3.00 use?
Socket 478, on DDR desktops with Northwood HT support.
How many cores does the Pentium 4 HT 3.00 have?
One core and 2 threads at 3 GHz with 512 KB of L2 cache.
What memory works with the Pentium 4 HT 3.00?
DDR through the board chipset.
Can the Pentium 4 HT 3.00 be upgraded?
The 3.20 and 3.40 share the socket. A move to LGA 775 needs a new board.
Sources and verification
Facts last checked against these sources on . Page last edited on .