iTunes wasn’t optimized for multi-core processors, but it scales with faster clock speeds. The step from 3.33 GHz to 3.9 GHz provided only a little benefit, but going to 4.26 GHz introduced a nice speed bump. iTunes seems to be sensitive to memory performance as well, which could explain the poor performance at 3.6 GHz when compared to 3.33 GHz.
Lame also scales nicely as you beef up the clock speed.
DivX is faster at transcoding video with every clock speed increase.
Xvid benefits even more from faster clock speeds than DivX.
The MainConcept encoder also was optimized for multi-core processors. Using a quad-core CPU will probably give you much more performance than the overclocking efforts we went through.
- Perfect Overclocking: Balanced Power And Performance
- Processor: Core 2 Duo E8600
- Platform: MSI P45D3 Neo-F (P45)
- Test Details and Overclocking
- Test Setup And Synthetic Benchmarks
- Game Benchmarks
- Audio/Video Benchmark Results
- Application Benchmark Results
- Power Consumption Results
- Efficiency Results