[techsupport] x1600 mobility radeon noise (4)

1 Name: 4n0n4ym0u5 h4xx0r : 2006-06-20 19:20 ID:xrtd++VY

just bought a travelmate 8200, and its got a mobility radeon x1600 w/ hypermemory 256mb card. Problem is, whenever i'm doing something thats minimally graphics intensive, such as viewing a video or displaying folders n stuff, it makes a clicking noise. This noise occurs with higher frequency depending on te intensiveness of the graphics. But theres no noise when i play games such as hl2. I know its the videocard and not the hard drive causing it cause i disabled the videocard and ran on intengrated graphics, and the sound was gone. Any ideas what might be causing it?

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."

3 Name: 4n0n4ym0u5 h4xx0r : 2006-06-21 13:58 ID:Heaven

Wow, that's some shittily implemented PWM.

4 Name: 4n0n4ym0u5 h4xx0r : 2006-06-21 18:38 ID:iEZXyxF6

phew, thanks alot for clearing that up

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