Skip to main content

A 4.1 GHz Dual Core at $130 - Can it be True?

Power Consumption Levels Top 200 W

We performed our performance measurements across a range of CPU clock rates. The test system we used incorporated the following components:

  • Intel Pentium D 805
  • Tagan i-Xeye 480 W PSU
  • Asus P5WD2-E Premium
  • OCZ DDR2-800 (2x 512 MB)
  • 2x Western Digital WD160
  • GeForce 7800 GTX
  • Gigabyte DVD-Rom 16x

When the Pentium D 805 is overclocked, the power consumption for an idle system (Windows desktop only) climbs to 88 W. The substantial increase in input voltage necessary for stable operation is a significant contributor to this increase.

With a heavy load (100% utilization) on both CPU cores, the difference between standard clock rates and overclocking to 4.1 GHz is pretty dramatic. The resulting boost in performance comes at the cost of 216 W of actual power consumed!