Gigabyte GA-F2A85XN-WIFI Mini-ITX Motherboard

CPUs|Motherboards | Do-It-Yourself Systems
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TEST METHODOLOGY

Test Setup:


Test configuration device listing.


In-Case Test Setup:

Measurement and Analysis Tools

Video Test Clip


1080p | 24fps | ~22 mbps

H.264/MKV 1080p: A custom 1080p H.264 encoded clip inside an Matroska container.



1080p | 24fps | ~2.3 mbps

Flash 1080p: The Dark Knight Rises Official Trailer #3, a YouTube HD trailer in 1080p.



1080p | 24fps | ~33mbps
H.264 Blu-ray: A short section (chapter 4) of the Blu-ray version of Disturbia, the motion picture, played directly off the Blu-ray disc. It is encoded with H.264/AVC.

Estimating DC Power

The following power efficiency figures were obtained for the Seasonic SS-400ET used in my 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 my test system. I extrapolate the DC power output from the measured AC power input based on this data. I 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. I 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 disabled unless the system lacks wired ethernet.

Our main test procedure is designed to determine the overall system power consumption at various states (measured using a Seasonic Power Angel). To stress the CPU, I use either Prime95 (large FFTs setting) or CPUBurn depending on which produces higher system power consumption. After 10~15 minutes of load (when temperatures stabilize), I also measure the hottest points on the external heatsinks using an infrared thermometer. To stress the IGP, I use FurMark, an OpenGL benchmarking and stability testing utility.

Finally, storage subsystems are tested briefly using CrystalDiskMark (1000 MB of 0x00 fill test data) and a Kingston HyperX 3K 120GB solid state drive. For USB and eSATA I use an external eSATA/USB 3.0 dock to connect the drive.



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