Labs

The 800 and 900 series of the Pentium D and Pentium Extreme Edition all use the same dual-core architecture, but with varying cache, clock speed and manufacturing process.

The Pentium D 805 and 820 are now very cheap for dual-core processors, but neither is fast in single-threaded applications. The 805 has an unusually slow bus speed of 533MHz that contributed to the worst scores in our audio-encoding and image-editing tests. The 820, with its 800MHz bus, did better at image editing. Both processors were far better in the multithreaded video-encoding test, with respectable scores of 171 and 184.

It has a significantly higher core speed and 2MB cache. It was fast at image editing and multitasking but not video encoding.

The Pentium Extreme Edition 965 increases the core speed to 3.73GHz, which led to great speed when video-encoding and image-editing.

Consider the Pentium D 805 and 820 for video encoding on the cheap. The Pentium D 940 and Extreme Edition 965 both look bad value compared to the new Core 2 Duo chips.