Intel Pentium 4 HT 540 socket: LGA 775
The Intel Pentium 4 HT 540 uses the LGA 775 socket. It is an 84 W single-core Prescott desktop part at 3.2 GHz with Hyper-Threading and 1 MB of L2 cache for LGA 775 towers.
- Socket
- LGA 775
- Launched
- June 2004
- Cores and threads
- 1 and 2
- Base power
- 84 W
- Codename
- Prescott
- Segment
- Desktop
- Family
- Intel Pentium 4 HT
- Clocks
- 3.2 GHz
Intel Pentium 4 HT 540 specifications
| Cores | 1 |
|---|---|
| Threads | 2 |
| Core architecture | Prescott cores on 90 nm |
| Clocks | 3.2 GHz (no turbo) |
| Cache | 1 MB L2 |
| Processor base power (TDP) | 84 W |
| Manufacturing process | 90 nm |
| Memory support | DDR or DDR2 through the board chipset |
| Front side bus | 800 MT/s |
| PCI Express | PCIe or AGP from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked (16x) |
| Package | LGA 775 (775-land FCLGA) |
Motherboard compatibility
Intel Pentium 4 HT 540 needs a motherboard with a LGA 775 socket. Chipset by chipset data for this codename is not recorded yet. See the LGA 775 chipset list and the board maker's CPU support list.
LGA 775 at a glance
| Type | LGA, 775 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | 2004 |
| Memory | DDR, DDR2 or DDR3, depending on the motherboard chipset |
| Cooler mounting holes | 72 × 72 mm |
What the Pentium 4 HT 540 is
The Intel Pentium 4 HT 540 is a 3.2 GHz single-core desktop processor with Hyper-Threading from June 2004. It runs one NetBurst Prescott core at 3.2 GHz with no turbo, so 1 core gives 2 threads. Cache is 1 MB of L2 on a 90 nm process. Power is rated at 84 W in an LGA 775 package with part numbers JM80547PG0881M.
The 540 uses an 800 MT/s front side bus with a 16x multiplier at 1.20 V to 1.425 V. Intel sold it at 278 dollars in June 2004. The chip supports MMX, SSE, SSE2 and SSE3 with Hyper-Threading. A 540J shares clocks with Execute Disable support from October 2004. Socket 478 3.2E parts at the same clocks offer a pin grid alternative with 103 W power, so the LGA 775 540 runs cooler at the same frequency.
Lower power at the same clocks separates the LGA 775 540 from the Socket 478 3.2E. The 84 W rating against 103 W reflects later steppings and land grid power delivery. That is why the 540 suited quieter LGA 775 towers while the 3.2E needed stronger Socket 478 cooling.
Socket and motherboard compatibility
The Pentium 4 HT 540 fits LGA 775 desktops with an 800 MT/s bus and Prescott HT support. It needs a land grid board. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
DDR towers are the natural match. Intel 915 boards accept the chip with an 84 W cooler. Boards listing the 530 normally accept the 540 with the same cooling.
Memory, PCIe and cooling
Memory is DDR or DDR2 through the board chipset. The board sets speed and capacity.
An 800 MT/s bus ties the CPU to the chipset, while graphics hangs off the chipset. No PCIe lanes originate on the die. Cooling uses the LGA 775 plate with an 84 W heatsink. Normal airflow suits the envelope.
Upgrade paths
On LGA 775 the steps are the Pentium 4 HT 550 at 3.4 GHz and the 560 at 3.6 GHz at higher power. The 540J adds Execute Disable at the same clocks. Socket 478 3.2E offers a pin grid alternative at higher power. The 540 lifts with the load plate, so swaps need no solder work.
Frequently asked questions
What socket does the Pentium 4 HT 540 use?
LGA 775, on desktops with Prescott HT support.
How many cores does the Pentium 4 HT 540 have?
One core and 2 threads at 3.2 GHz with 1 MB of L2 cache.
What memory works with the Pentium 4 HT 540?
DDR or DDR2 through the board chipset.
Can the Pentium 4 HT 540 be upgraded?
The 550 and 560 share the socket at higher power. The 540J adds Execute Disable.
Sources and verification
Facts last checked against these sources on . Page last edited on .