The Intel Celeron 420 was a desktop processor with 1 core, launched in June 2007. It is part of the Celeron lineup, using the Conroe architecture with Socket 775. Celeron 420 has 512 KB of L2 cache and operates at 1600 MHz. Intel is making the Celeron 420 on a 65 nm production node using 105 million transistors. The multiplier is locked on Celeron 420, which limits its overclocking potential.
With a TDP of 35 W, the Celeron 420 consumes only little energy. Intel's processor supports DDR1, DDR2 and DDR3 memory with a dual-channel interface. For communication with other components in the machine, Celeron 420 uses a PCI-Express Gen 2 connection. Although the processor doesn't come with integrated graphics, certain motherboards with compatible chipsets can provide this capability.
The SSE4 instruction set is not supported, which can cause problems with modern games, as they require that capability.