Intel DQ77KB Technical Product Specification - Page 76
Thermal Considerations - documents
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Intel Desktop Board DQ77KB Technical Product Specification 2.7.2 Fan Header Current Capability CAUTION The processor fan must be connected to the processor fan header, not to a chassis fan header. Connecting the processor fan to a chassis fan header may result in onboard component damage that will halt fan operation. Table 45 lists the current capability of the fan headers. Table 45. Fan Header Current Capability Fan Header Processor fan System fan Maximum Available Current 2.0 A 1.5 A 2.7.3 PCI Express Add-in Card Considerations The motherboard is designed to provide up to 25 W to the PCI Express x4 slot. The total power consumption from add-in boards on this slot must not exceed this rating. 2.8 Thermal Considerations CAUTION A chassis with a maximum internal ambient temperature of 38 oC at the processor fan inlet is a requirement. Use a processor heat sink that provides omni-directional airflow to maintain required airflow across the processor voltage regulator area. CAUTION Failure to ensure appropriate airflow may result in reduced performance of both the processor and/or voltage regulator or, in some instances, damage to the board. For a list of chassis that have been tested with Intel desktop boards please refer to the following website: http://www3.intel.com/cd/channel/reseller/asmo-na/eng/tech_reference/53211.htm All responsibility for determining the adequacy of any thermal or system design remains solely with the reader. Intel makes no warranties or representations that merely following the instructions presented in this document will result in a system with adequate thermal performance. 76