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Intel Power Consumption Then and Now

Pentium D 830

The Pentium D 800 series equals two Pentium 4 600 dies on a chip, but with only 1 MB L2 cache per core. All other features of the Pentium 4 600 series were retained. Since two processing cores require more power than a single one and the power envelope of 130 W imposes a restriction, clock speeds had to be reduced a bit. As a consequence, the fastest model was the Pentium D 840 at 3.2 GHz, with the Pentium D 820 at 2.8 GHz being the entry-level dual core. Our Pentium D 800 at 3.0 GHz, which is model 830, provided slightly more performance than the Pentium 4 630, but also required the most power of all processors in our lineup: 215 watt-hours is a lot, especially when compared to the 106 watt-hours of the Core 2 Duo E6850.

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We used a Pentium D840 (3.2 GHz) and set it to 3.0 GHz (Pentium D 830).

With Enhanced SpeedStep enabled, a Pentium class FSB800 processor on Socket 775 will reduce its idle clock speed to 2.8 GHz. In case of the Pentium D 830, this is not much of a difference compared to the default clock speed of 3.0 GHz.