Intel Pentium 4 505 socket: LGA 775
The Intel Pentium 4 505 uses the LGA 775 socket. It is an 84 W single-core Prescott desktop part at 2.66 GHz with 1 MB of L2 cache for value LGA 775 towers.
- Socket
- LGA 775
- Launched
- December 2004
- Cores and threads
- 1 and 1
- Base power
- 84 W
- Codename
- Prescott
- Segment
- Desktop
- Family
- Intel Pentium 4
- Clocks
- 2.66 GHz
Intel Pentium 4 505 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Prescott cores on 90 nm |
| Clocks | 2.66 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 | 533 MT/s |
| PCI Express | PCIe or AGP from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked (20x) |
| Package | LGA 775 (775-land FCLGA) |
Motherboard compatibility
Intel Pentium 4 505 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 4 505 is
The Intel Pentium 4 505 is a 2.66 GHz single-core desktop processor from December 2004. It runs one NetBurst Prescott core at 2.66 GHz with no Hyper-Threading on this rating, so 1 core gives 1 thread. Cache is 1 MB of L2 on a 90 nm process. Power is rated at 84 W in an LGA 775 package with part number JM80547PE0671M.
The 505 opens the LGA 775 Pentium 4 5xx line for value towers, using a 533 MT/s front side bus with a 20x multiplier at 1.25 V to 1.40 V. Intel placed it below Hyper-Threading 520 parts at 2.8 GHz, giving buyers 1 MB of cache without the thread premium. The chip supports MMX, SSE, SSE2 and SSE3. A 505J shares the clocks with Execute Disable support, so feature flags separate the two numbers. This page covers the base 505 D0 part.
Value LGA 775 positioning explains the 533 MT/s bus against 800 MT/s on faster Pentium 4 parts. The slower bus trims board cost while the 1 MB cache preserves responsiveness in office tasks. That trade suited system makers with DDR value boards and integrated graphics.
Socket and motherboard compatibility
The Pentium 4 505 fits LGA 775 value desktops with a 533 MT/s bus and Prescott BIOS support. It needs a land grid board with 533 MT/s chipset support. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
DDR value towers with integrated graphics are the natural match. Intel 915 chipsets with 533 MT/s support accept the chip with an 84 W cooler. Boards listing the 505 normally accept the 505J with a BIOS update for Execute Disable.
Memory, PCIe and cooling
Memory is DDR or DDR2 through the board chipset. The board sets speed and capacity.
A 533 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 value envelope.
Upgrade paths
On LGA 775 the steps are Pentium 4 511 at 2.8 GHz and 515 at 2.93 GHz with the same cache. The 505J at the same clocks adds Execute Disable support where listed. Hyper-Threading 520 parts at 2.8 GHz offer threads as a larger lift. The 505 lifts with the load plate, so swaps need no solder work.
Frequently asked questions
What socket does the Pentium 4 505 use?
LGA 775, on value desktops with a 533 MT/s bus and Prescott support.
How many cores does the Pentium 4 505 have?
One core and 1 thread at 2.66 GHz with 1 MB of L2 cache.
What memory works with the Pentium 4 505?
DDR or DDR2 through the board chipset.
Can the Pentium 4 505 be upgraded?
The 511 and 515 share the socket. The 505J adds Execute Disable at the same clocks.
Sources and verification
Facts last checked against these sources on . Page last edited on .