The Intel Pentium Extreme Edition 840 was a desktop processor with 2 cores, launched in April 2005, at an MSRP of $999. It is part of the Pentium Extreme Edition lineup, using the Smithfield architecture with Socket 775. Thanks to Intel Hyper-Threading the core-count is effectively doubled, to 4 threads. Pentium Extreme Edition 840 has 1 MB of L2 cache per core and operates at 3.2 GHz. Intel is building the Pentium Extreme Edition 840 on a 90 nm production process using 230 million transistors. You may freely adjust the unlocked multiplier on Pentium Extreme Edition 840, which simplifies overclocking greatly, as you can easily dial in any overclocking frequency.
With a TDP of 130 W, the Pentium Extreme Edition 840 consumes a lot of power, so good cooling is definitely needed. Intel's processor supports DDR1, DDR2 and DDR3 memory with a dual-channel interface. For communication with other components in the computer, Pentium Extreme Edition 840 uses a PCI-Express N/A 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.