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Dell forum member since 2002
Home Built PC with Gigabyte GA-Z77X-UD5H motherboard, i7 3770 CPU, Windows 7 64 bit Home/Win 8.1. SSD drive. Sonar X3c 64 bit Recordng Software.
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Here is the download page for your driver:
The device is Soundmax made by Analog Devices
After you download it, it opens right up and says Soundmax. I have a 4550 as well and just did a reinstall. Sound works now.