[techsupport] x1600 mobility radeon noise (4)

2 Name: 4n0n4ym0u5 h4xx0r : 2006-06-20 21:40 ID:uUQXVMoW

"Unlike NVidia, ATI implements PWM (pulse-width modulation) on their graphics cards to control the fan speeds. The fan is controlled by continuously pulsing the power supply instead of providing a lower voltage as the NVidia cards do. As a result, when not spinning the fan at 100% it creates a clicking sound which some have criticized when creating a silent computer."

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