uhh i wasn't sure which forum to post this but here it goes. my brother was playing Doom 3. he has a gen2 dell xps. it has a p4 3.2 ghz and an ati radeon 9800 pro 128 mb. he messed around with the game's graphics quality and screen res. after a while he began to develop this in-game clicking noise. i'm not sure what to tell him but i was hoping someone could help (stares at Bob). any suggestions would be great! thanks in advance.

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