AMD’s FX processor line-up was supposedly designed with efficiency in mind, according to AMD. We're putting this claim to the test, assessing the Bulldozer architecture at a number of different clock rates and comparing the results to Intel's CPUs.
When you run the system with a lower CPU voltage setting, performance differences compared to default are minimal. In fact, strangely enough, the system is actually faster.
Because power consumption decreases noticeably, the undervolted system sports the best efficiency for single-threaded applications. This test also shows that, at least in terms of power efficiency, it does not pay to overclock AMD's FX family.
- Overclocking And Undervolting AMD's FX Family
- The Bulldozer Platform: Using FX-8150 To Test
- Water Cooling Versus Two Air Coolers
- Clock Frequency: 3.6 GHz, Multiplier: 18x, CPU Voltage: 1.332 V
- Clock Frequency: 3.8 GHz, Multiplier: 19x, CPU Voltage: 1.352 V
- Clock Frequency: 4.0 GHz, Multiplier: 20x, CPU Voltage: 1.38 V
- Clock Frequency: 4.5 GHz, Multiplier: 22.5x, CPU Voltage: 1.428 V
- Clock Frequency: 4.6 GHz, Multiplier: 23x, CPU Voltage: 1.5 V
- Clock Frequency: 3.6 GHz, Multiplier: 18x, CPU Voltage: 1.116 V
- Test System, Benchmarks, And Settings
- Benchmark Results: Archiving And Professional Applications
- Benchmark Results: Matlab
- Benchmark Results: Audio/Video
- Benchmark Results: Energy Consumption (Idle/Load)
- Single-Thread Efficiency Test
- Multi-Threaded Efficiency Test
- Combined Efficiency Test Results
- Efficiency Score And Power Diagram
- Overclocking And Efficiency Are Like Oil And Water With Bulldozer