Asus P8H67-I Deluxe Mini-ITX Motherboard

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TEST METHODOLOGY

Test Setup:


Test configuration device listing.


Measurement and Analysis Tools

Video Test Clip


1080p | 24fps | ~22mbps

H.264: Crash is a 1080p x264 clip encoded from the Blu-ray version of an science fiction film. It features the aftermath of a helicopter crash. It has an unusually high bitrate for video of this type.


Estimating DC Power

The following power efficiency figures were obtained for the Seasonic SS-400ET used in our test system:

Seasonic SS-400ET Test Results
DC Output (W)
21.2
41.6
60.2
81.9
104.7
124.1
145.2
AC Input (W)
32.0
58.0
78.0
102.0
128.0
150.0
175.0
Efficiency
66.3%
71.7%
77.1%
80.3%
81.8%
82.8%
83.0%

This data is enough to give us a very good estimate of DC demand in our test system. We extrapolate the DC power output from the measured AC power input based on this data. We won't go through the math; it's easy enough to figure out for yourself if you really want to.

Testing Procedures

If available, the latest motherboard BIOS is installed prior to testing. Certain services/features like Indexing, Superfetch, System Restore, and Windows Defender are disabled to prevent them from causing spikes in CPU/HDD usage. We also make note if energy saving features like Cool'n'Quiet/SpeedStep or S3 suspend-to-RAM do not function properly. If a WiFi adapter is present, it is enabled but left unconnected.

Our main test procedure is designed to determine the overall system power consumption at various states (measured using a Seasonic Power Angel). To stress CPUs we use either Prime95 (large FFTs setting) or CPUBurn depending on which produces higher system power consumption. To stress the IGP, we use FurMark, an OpenGL benchmarking and stability testing utility. Power consumption during playback of high definition video is also recorded.

Operating Voltage

Before we start, we present the operating voltages of our Core i5-2500K provided by some of the motherboards compared today. Higher voltages don't necessarily equate to higher power consumption, but in many cases there is a correlation.



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