This is nice to watch. Since the processor voltage only required a small increase at the 3.6 GHz setting, the system idle power only increases a little bit. However, as the 3.8 GHz setting automatically switched off Cool’n’Quiet, the system idle power jumped to 133 W, which resembles a 43% increase. We couldn’t prevent this action, even on other motherboards.
Peak power scales with the clock speed, but it becomes obvious that each clock speed bump that requires voltage increase introduces much increased peak power, in turn. In the case of 2.8 GHz, the system did not require more than 184 W, while the 3.6 GHz setting stayed at a maximum of 222 W. The 3.8 GHz setting, however, jumped to 271 W.
- Chasing Down The Perfect Clock Speed For AMD's Phenom II X4
- AMD Phenom II X4 940 Black Edition (BE)
- The Platform: Jetway HA07 Ultra With AMD's 790GX Chipset
- Settings: 2.8, 3.0, And 3.2 GHz
- Settings: 3.4, 3.6, And 3.8 GHz
- Speed And Voltage Table, Test Setup And Components
- Performance Results: Games
- Performance Results: PCMark And 3DMark Vantage
- Performance Results: Applications
- Performance Results: Audio/Video
- Idle/Peak Power Consumption Analysis
- Average And Total Power During PCMark
- Efficiency Results