Intel Core i7-6700: Skylake i7 at 65W

CPUs|Motherboards
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TEST METHODOLOGY

Motherboards:

  • Gigabyte Z170X-UD5 - LGA1151, Z170 chipset, ATX
  • Gigabyte Z97MX-Gaming 5 - LGA1150, Z97 chipset, microATX
  • ASRock FM2A88-ITX+ - FM2+ socket, A88X chipset, mini-ITX
  • Asus F2A85-M Pro - FM2 socket, A85X chipset, microATX

Common Test Components:

  • Kingston HyperX Genesis memory - 2x4GB, DDR3-1866 @ 1600 MHz, C9
  • Kingston Fury memory - 2x4GB, DDR4-2667, C15
  • Seasonic SS-400ET power supply - 400W, ATX
  • Scythe Kabuto CPU cooler - stock fan at 800 RPM
  • Microsoft Windows 7 operating system - Ultimate, 64-bit

IGP Only Test Components:

  • ADATA XPG SX910 128GB or Kingston HyperX 3K 120GB solid-state drive - 2.5-inch, SATA 6 Gbps

CPU Only Test Components:

  • Asus EN9400GT Silent Edition graphics card - 512MB
  • Western Digital VelociRaptor hard drive - 300GB, 10,000RPM, 16MB cache

IGP test platform device listing.

Measurement and Analysis Tools:

Timed Benchmark Test Details:

  • Photoshop: Image manipulation using a variety of filters, a derivation of Driver Heaven's Photoshop Benchmark V3 (test image resized to 4500x3499).
  • NOD32: In-depth virus scan of a folder containing 32 files of varying size with many RAR and ZIP archives.
  • WinRAR: Archive creation with a folder containing 68 files of varying size (less than 50MB).
  • iTunes: Conversion of an MP3 file to AAC.
  • TMPGEnc: Encoding a XVID AVI file with VC-1.
  • HandBrake: Encoding a XVID AVI file with H.264.

Video Test Suite:


1080p | 24fps | ~22 mbps

H.264/MKV: 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.

Testing Procedures

Our main test procedure is a series of CPU (timed tests of real-world applications) benchmarks. System power consumption is measured during the CPU tests (an average of the first 5~15 seconds) and in various states including idle, H.264 and Flash playback and full CPU and GPU load using Prime95/CPUBurn and FurMark.

Certain services and features like Superfetch and System Restore are disabled to prevent them from affecting our results. We also make note if energy saving features like Cool'n'Quiet and SpeedStep do not function properly.

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.



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