Sony PCG-GRV550 - Manual (Page 147)

To reduce fan noise
1. Right-click the CPU icon on the taskbar, and select Edit/Create Profiles. The AC Power Profile Editor
window appears.
2. Double-click System to open the file if it isn't already opened.
3. Double-click Thermal Control Strategy - Performance, and select Quiet.
4. Restart your computer.
Why does the System Properties dialog box display a slower CPU speed than advertised?
This is normal. Because your computer's CPU utilizes a type of CPU speed controlling technology for power conservation
purposes, System Properties may display the CPU's current speed instead of the maximum speed.
Page 147