Intel Celeron 420 socket: LGA 775
The Intel Celeron 420 uses the LGA 775 socket. It is a 35 W single-core Conroe-L desktop part at 1.6 GHz with 512 KB of L2 cache for value towers.
- Socket
- LGA 775
- Launched
- June 2007
- Cores and threads
- 1 and 1
- Base power
- 35 W
- Codename
- Conroe-L
- Segment
- Desktop
- Family
- Intel Celeron
- Clocks
- 1.6 GHz
Intel Celeron 420 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Conroe-L cores on 65 nm |
| Clocks | 1.6 GHz (no turbo) |
| Cache | 512 KB L2 |
| Processor base power (TDP) | 35 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2 through the board chipset |
| Front side bus | 800 MT/s |
| PCI Express | PCIe from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked |
| Package | LGA 775 |
Motherboard compatibility
Intel Celeron 420 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 Celeron 420 is
The Intel Celeron 420 is a 1.6 GHz single-core value desktop processor from June 5, 2007. It runs one Core core at 1.6 GHz with no turbo, so 1 core gives 1 thread. Cache is 512 KB of L2 on a 65 nm process. Power is rated at 35 W on LGA 775.
The 420 opened the Conroe-L line in stepping A1 on an 800 MT/s bus. It has no VT-x virtualization or SpeedStep, as is traditional with Celerons. It exists because Intel kept a single-core Celeron for the cheapest desktops while dual cores took over the mainstream.
Socket and motherboard compatibility
The 420 drops into LGA 775 boards with DDR2 memory and a BIOS that lists Conroe-L Celerons, such as 945 and G31 boards. Board support lists confirm the 1.6 GHz 800 FSB 512 KB part on LGA 775. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR2 through the board chipset in two channels.
An 800 MT/s front side bus ties the CPU to the chipset. PCIe slots hang off the chipset.
Cooling is any 35 W rated LGA 775 heatsink on the 72.5 × 72.5 mm mount.
Upgrade paths
On LGA 775 the upgrade is the Intel Celeron 430 at 1.8 GHz or the Intel Celeron 440 at 2.0 GHz within the Conroe-L line, or the Intel Celeron E1200 at 1.6 GHz for a second core. Beyond LGA 775 a move to a newer platform needs a new board and memory.
Frequently asked questions
What socket does the Celeron 420 use?
LGA 775, on DDR2 boards with a Celeron-aware BIOS.
How many cores does the Celeron 420 have?
One core and 1 thread at 1.6 GHz with 512 KB of L2 cache.
What memory works with the Celeron 420?
DDR2 through the board chipset in two channels.
Sources and verification
Facts last checked against these sources on . Page last edited on .