Low Latency DDR2 800MHz versus 1,066MHz

October 27, 2008 | 07:02

Tags: #5 #3 #4 #800mhz #benchmark #better #cas #ddr2 #p45 #performance #result

Companies: #gskill #intel #test

File Compression & Encryption:

Website: WinRAR

Large File Compression & Encryption

WinRAR 3.71, Multithreaded, 276MB source file

  • DDR2 1,066MHz C5
  • G.SKill Pi-Black 4GB 1,015MHz C5
  • G.SKill Pi-Black 4GB 800MHz C4
  • DDR2 800MHz C5
  • 101
  • 103
  • 112
  • 115
0
25
50
75
100
125
Time in seconds (lower is better)

Small File Compression & Encryption

WinRAR 3.71, Multithreaded, 400 2048x1536 Photos

  • DDR2 1,066MHz C5
  • G.SKill Pi-Black 4GB 1,015MHz C5
  • G.SKill Pi-Black 4GB 800MHz C4
  • DDR2 800MHz C5
  • 96
  • 99
  • 102
  • 102
0
25
50
75
100
Time in seconds (lower is better)

Compression does see a significant performance increase from faster DDR2 memory over low latency, even though the Pi-Blacks at CAS-4 are three seconds faster than DDR2-800 at CAS-5 in large file compression it makes no difference in small file compression. The difference between DDR2-800 and overclocked 1000+MHz (PC2-8000) is significant though at roughly ten seconds and three to six seconds respectively. It's faster for large file compression because there are less interruptions to write to disk.

File Decompression & Decryption


Large File Decompression & Decryption

WinRAR 3.71, Multithreaded, 276MB source file

  • DDR2 1,066MHz C5
  • G.SKill Pi-Black 4GB 1,015MHz C5
  • G.SKill Pi-Black 4GB 800MHz C4
  • DDR2 800MHz C5
  • 15
  • 15
  • 16
  • 16
0
3
5.5
8
10.5
13
15.5
18
Time in seconds (lower is better)

Small File Decompression & Decryption

WinRAR 3.71, Multithreaded, 400 2048x1536 Photos

  • G.SKill Pi-Black 4GB 1,015MHz C5
  • G.SKill Pi-Black 4GB 800MHz C4
  • DDR2 1,066MHz C5
  • DDR2 800MHz C5
  • 23
  • 23
  • 23
  • 23
0
5
10
15
20
25
Time in seconds (lower is better)

Decompression makes no difference all around apart from a second on average for large file with overclocked 1,015MHz and 1,066MHz memory but it's within experimental error. The bottleneck for decompressing compressed files is clearly overwhemlingly the system and hard drive, rather than the small differences in memory performance.
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