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2.4.1 Power Supply Connector
The kit has the following power supply connector:
• External Power Supply – the kit can be powered through a 19.5v DC connector on the back
panel (see Figure 16, C). The back panel DC connector is compatible with a 7.4mm/OD (outer
diameter) and 5.0 mm/ID (inner diameter) plug, where the inner 0.8mm contact is +19.5
(±10%) V DC and the shell is GND. The maximum current rating is 11.8 A.
NOTE
External power voltage, 19.5v DC, is dependent on the type of power brick used.
2.4.1.1.1 Power Sensing Circuit
The kit has a power sensing circuit that:
• Manages CPU power usage to maintain system power consumption below 230 W.
• Designed for use with 230 W AC-DC adapters.
NOTE
It is recommended that you disable this feature (via BIOS option) when using an AC-DC
adapter greater than 230 W.
2.4.2 Fan Header Current Capability
Table 16 lists the current capability of the fan header.
Table 16. Dual Fan Header Current Capability
Maximum Available Current
2.5 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Telcordia SR-332 Issue 2,
Method I, Case 3, 55 ºC ambient. The MTBF prediction is used to estimate repair rates and spare
parts requirements. The MTBF for Intel NUC8i7HN Kit is TBD Hours
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