那要查清楚喔，您可以去Creative下載文檔，裡面對前置音源線有這樣的說明：
引用:
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作者Creative
Front Panel Header
Connection compatiblity
Intel HD Front Panel Audio standard only
Notes
Not compatible with AC97 or Intel-compatible HD Front Panel Audio.
Microphone limitation
Rear microphones are automatically disabled when both front and rear microphones are connected
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有提到並不相容AC97，小弟本身就是用X-Fi Gamer，所以知道用AC97接上去，
會有雜音，且偵測功能都失效；改用HD Audio，功能就正常了，且也沒雜音，
所以除了等待回應，也建議您直接去問聯力。