This equipment has been tested and found to comply with the limits of a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. There is no guarantee that interference will not occur in a particular installation. The vendor makes no representations or warranties with respect to the contents hereof and specially disclaims any implied warranties of merchantability or fitness for any purpose. Further, the vendor reserves the right to revise this publication and to make changes to the contents hereof without obligation to notify any party beforehand. Duplication of this publication, in part or in whole, is not allowed without first obtaining the vendor’s approval in writing. The content of this user’s manual is subject to be changed without notice and we will not be responsible for any mistakes found in this user’s manual. All the brand and product names are trademarks of their respective companies.
This manual covers the U8668-D motherboard’s features, package contents, and detailed layout diagrams for each hardware revision. It includes CPU installation guidance, supported memory types, connector pin‑outs, and a full list of expansion slots.
Later sections describe BIOS configuration options such as CPU voltage, chassis open warning, shutdown temperature, and frequency control, as well as troubleshooting procedures and methods for resetting the CMOS.