Intel Core i5-661: A 32nm CPU with Integrated Graphics

CPUs|Motherboards
Viewing page 3 of 7 pages. Previous 1 2 3 4 5 6 7 Next

TEST METHODOLOGY

Common Test Platform:

AMD AM3:

Intel LGA775:

Intel LGA1156:

  • Intel Core i5-750 processor - 2.66GHz, 45nm, 95W
  • Intel Core i5-661 processor - 3.33GHz, 32nm, 87W
  • Intel DP55KG motherboard - P55 chipset (for Core i5-750)
  • Intel DH55TC motherboard - H55 chipset (for Core i5-661)
  • Thermalright MUX-120 CPU cooler


Device listing (CPU test platform).

Measurement and Analysis Tools

  • CPU-Z to monitor CPU frequency and voltage.
  • CPUBurn processor stress software.
  • Prime95 processor stress software.
  • ATITool artifact scanner to stress the integrated GPU.
  • FurMark stability test to stress the integrated GPU.
  • Cyberlink PowerDVD to play H.264/VC-1/Blu-ray video.
  • Eset NOD32 as an anti-virus benchmark.
  • WinRAR as an archiving benchmark.
  • iTunes an audio encoding benchmark.
  • TMPGEnc Xpress as a video encoding benchmark.
  • PCMark05 as a general system benchmark.
  • 3DMark05 as a 3D benchmark.
  • 3DMark06 as a 3D benchmark.
  • Seasonic Power Angel AC power meter, used to measure the power consumption of the system.
  • Custom-built, four-channel variable DC power supply, used to power and regulate the CPU fan.

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)
AC Input (W)
Efficiency
21.2
32.0
66.3%
41.6
58.0
71.7%
60.2
78.0
77.1%
81.9
102.0
80.3%
104.7
128.0
81.8%
124.1
150.0
82.8%
145.2
175.0
83.0%
165.3
195.0
84.8%
193.2
227.0
85.1%
222.7
261.0
85.3%

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

Our IGP testing procedure is to run the system through a video test suite featuring a variety of high definition clips. During playback, a CPU usage graph is created by the Windows Task Manger for analysis to determine the average CPU usage. High CPU usage is indicative of poor video decoding ability. If the video (and/or audio) skips or freezes, we conclude the IGP (in conjunction with the processor) is inadequate to decompress the clip properly.

Our CPU testing procedure is designed to determine the overall system power consumption at various states (measured using a Seasonic Power Angel). To stress CPUs we use Prime95 (large FFTs setting) or CPUBurn, whichever produces the higher power draw. We also perform a short series of benchmarks featuring real-world timed tests and synthetics detailed below.

Cool'n'Quiet and/or Intel SpeedStep were enabled (unless otherwise noted). The following features/services were disabled during testing to prevent spikes in CPU/HDD usage that are typical of fresh Vista installations:

  • Windows Sidebar
  • Indexing
  • Superfetch

CPU Benchmark Details

  • Eset NOD32: In-depth virus scan of a folder containing 32 files of varying size with many of them being file 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 (256kbps).
  • TMPGEnc Xpress: Encoding a 1-minute long XVID AVI file to VC-1 (1280x720, 30fps, 20mbps).

Video Test Suite


1080p | 24fps | ~10mbps
H.264: Rush Hour 3 Trailer 1 is a H.264 encoded clip inside an Apple Quicktime container.


1080p | 24fps | ~8mbps
WMV-HD: Coral Reef Adventure Trailer is encoded in VC-1 using the WMV3 codec commonly recognized by the "WMV-HD" moniker.


1080p | 24fps | ~19mbps
VC-1: Drag Race is a recording of a scene from network television re-encoded with TMPGEnc using the WVC1 codec, a more demanding VC-1 codec.


1080p | 24fps | ~33mbps
Blu-ray: Disturbia is 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.


1080p | 24fps | ~36mbps
Blu-ray: Becoming Jane is a short section (chapter 7) of the Blu-ray version of Becoming Jane, the motion picture, played directly off the Blu-ray disc. It is encoded with VC-1.



Previous 1 2 3 4 5 6 7 Next

CPUs|Motherboards - Article Index
Help support this site, buy from one of our affiliate retailers!
Search: