Intel's LGA1156 and Lynnfield core

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Common Test Platform:

Intel LGA1366:

Intel LGA1156:

  • Intel Core i7-870 processor - 2.93 GHz, 45nm, 95W
  • Intel Core i5-750 processor - 2.66 GHz, 45nm, 95W
  • Thermalright MUX-120 CPU cooler
  • Intel DP55KG motherboard - P55 chipset
  • Corsair XMS3 memory 2x2GB, DDR3-1600 @ 1333MHz, 9-9-9-24

LGA1156 test system device listing.

Intel LGA775:


Measurement and Analysis Tools

  • CPU-Z to monitor CPU frequency and voltage.
  • CPUBurn processor stress software.
  • Prime95 processor stress software.
  • 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.
  • 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.

Benchmark Test 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.
  • TMPGEnc Xpress: Encoding a 1-minute long XVID AVI file to VC-1 (1280x720, 30fps, 20mbps).

Our testing procedure is designed to determine the overall system AC power consumption at various states. To stress CPUs we used Prime95 (large FFTs setting) or CPUBurn (which ever one produced the higher power draw). We also performed a short series of benchmarks featuring real-world timed tests and synthetics.

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

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