Intel Lynnfield Memory Performance Analysis

Written by Richard Swinburne

November 2, 2009 | 10:22

Tags: #12800 #1333 #1600 #2000 #2133 #analysis #article #benchmarks #c7 #c9 #channel #cl7 #cl8 #cl9 #core #ddr3 #dimm #dual #i5 #i7 #kit #lynnfield #perform #performance #review #tests

Companies: #intel

File Compression & Encryption:

Website: WinRAR

Large File Compression & Encryption

WinRAR 3.71, Multithreaded, 276MB source file

  • 1,600MHz CL9
  • 1,600MHz CL8
  • 1,600MHz CL7
  • 1,600MHz CL6
  • 2,000MHz CL9
  • 2,000MHz CL8
  • 2,000MHz CL7
    • 59
    • 58
    • 57
    • 55
    • 56
    • 55
    • 54
0
10
20
30
40
50
60
Seconds (lower is better)
  • Seconds (lower is better)

Large File Compression & Encryption

WinRAR 3.71, Multithreaded, 276MB source file

  • 1,800MHz CL9
  • 1,800MHz CL8
  • 1,800MHz CL7
  • 2,133MHz CL9
  • 2,133MHz CL8
    • 58
    • 57
    • 56
    • 56
    • 55
0
10
20
30
40
50
60
Seconds (lower is better)
  • Seconds (lower is better)

Small File Compression & Encryption

WinRAR 3.71, Multithreaded, 400 2048x1536 Photos

  • 1,600MHz CL9
  • 1,600MHz CL8
  • 1,600MHz CL7
  • 1,600MHz CL6
  • 2,000MHz CL9
  • 2,000MHz CL8
  • 2,000MHz CL7
    • 62
    • 62
    • 60
    • 59
    • 60
    • 59
    • 59
0
10
20
30
40
50
60
Seconds (lower is better)
  • Seconds (lower is better)

Small File Compression & Encryption

WinRAR 3.71, Multithreaded, 400 2048x1536 Photos

  • 1,800MHz CL9
  • 1,800MHz CL8
  • 1,800MHz CL7
  • 2,133MHz CL9
  • 2,133MHz CL8
    • 67
    • 67
    • 66
    • 66
    • 65
0
10
20
30
40
50
60
70
Seconds (lower is better)
  • Seconds (lower is better)

There's a gentle but notable progression in file encoding with WinRAR, with large file compression showing a bigger trend than many small files. This trend is only four to five seconds across the whole range, but that's a seven to 10 per cent performance increase so with a very large number of files that's a potentially large performance gain.

Multitasking Performance

Website: MPC-HC
Website: 7-Zip

Multi-tasking Test (7-Zip and Mplayer)

CustomPC Benchmark

  • 1,600MHz CL9
  • 1,600MHz CL8
  • 1,600MHz CL7
  • 1,600MHz CL6
  • 2,000MHz CL9
  • 2,000MHz CL8
  • 2,000MHz CL7
    • 122
    • 120
    • 114
    • 110
    • 117
    • 113
    • 110
0
25
50
75
100
125
Seconds (lower is better)
  • Seconds (lower is better)

Multi-tasking Test (7-Zip and Mplayer)

CustomPC Benchmark

  • 1,800MHz CL9
  • 1,800MHz CL8
  • 1,800MHz CL7
  • 2,133MHz CL9
  • 2,133MHz CL8
    • 116
    • 112
    • 108
    • 111
    • 107
0
25
50
75
100
125
Seconds (lower is better)
  • Seconds (lower is better)

Multi-tasking is where we see the biggest benefit to real-world performance so far, with a big drop in time from 1,600MHz CL9 to CL6 that almost follows the 2,000MHz numbers. The same goes for the 1,800MHz CL7 versus 2,160MHz CL8 frequency too. This means our video playback with 7-Zip file compression multitasking benefits from lower latency more than it does frequency, reinforcing our reasoning to buy a Core i5 750, which doesn't feature the highest 12x memory strap allowing for 2,160MHz like the Core i7 870 we're using here does.
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