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Intel 3945ABG DPC spikes (audio stutter, mouse) in Windows 8.1

As reported by many users, Intel WiFi chips such as 3945ABG and the later 4965 may experience CPU spikes due to DPC activity. This is typically experienced as: Audio stuttering. Uninterrupted ...
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How can I reduce high CPU usage from DPC's with USB Serial Ports

I have an app that communicates with up to 50 devices over serial ports. The communication takes place in threads, and the threads are throttled so that only a certain number are active at once. ...