Skip to main content

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

5
  • Well - your laptop isn't running ECC, so that would explain that. Is ECC running on the Intel server?
    – pauska
    Commented Sep 25, 2012 at 15:33
  • The RAM modules in the AMD server are ECC modules. I don't know about the Intel server. dmidecode doesn't give any info on the modules it uses. But could ECC really explain the huge difference? Googling suggests that ECC RAM gives a few % penalty. I'm seeing a lot more than that here!
    – ntherning
    Commented Sep 25, 2012 at 15:51
  • What's the layout of the memory? Is it registered?
    – Chris S
    Commented Sep 25, 2012 at 17:27
  • @ChrisS: I've updated the question with more info on the memory modules and the current layout.
    – ntherning
    Commented Sep 25, 2012 at 20:03
  • 1
    The wrong organization can cause havoc, but yours is correct. I'm really not sure what's going on here, but I know current Opterons beat current Intel processors in various memory benchmarks on account of the Opterons having 4 channels, and Intel only having 3. There might be something going on with the single threaded nature of the mbw software; though dd is showing similar results... Not sure, but not right.
    – Chris S
    Commented Sep 25, 2012 at 20:33