800 MHz vs 667 MHz FB-DIMMs

Article: Harpertown Performance Preview
By: gpriatko (nospam.delete@this.thanksanyway.com), November 13, 2007 8:09 pm
Room: Moderated Discussions
Hi David,

Thanks for the update.

Yeah, the X7DWN+ looks like a very nice system. I'm about to order one for SiliconMechanics.com for running sims.

What's your opinion on the value of 800 MHz vs 667 MHz memory?

I'm having trouble finding 800 MHz FB-DIMMs. Supermicro says that they've tested the Kingston 1GB modules in the X7DWN+. They also claim to have tested 2GB and 4GB modules in the X7DWA-N. I can't find those modules on the vendor's web sites.

I suspect that the reason that there are no 2GB or 4GB modules validated for the X7DWN+ is caused by some limit with the number of ranks that the memory controller can keep active.

The X7DWA-N has fewer DIMM slots than the X7DWN+. If the 2GB and 4GB modules are using lots of ranks, then that could be why there are no 2GB or 4GB modules for the X7DWN+.

_gordon
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Harpertown Preview OnlineDavid Kanter2007/11/09 06:44 AM
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                That's just how I writeanonymous2007/11/10 04:58 PM
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  Harpertown Preview Online*(&^2007/11/09 11:38 PM
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      Supermicro MBDavid Kanter2007/11/13 12:52 AM
        800 MHz vs 667 MHz FB-DIMMsgpriatko2007/11/13 08:09 PM
          800 MHz vs 667 MHz FB-DIMMsDavid Kanter2007/11/14 12:38 AM
            800 MHz vs 667 MHz FB-DIMMsgpriatko2007/11/15 08:29 PM
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    New O-O-O transaction Mode?Michael S2007/11/13 02:05 AM
    New O-O-O transaction Mode?David Kanter2007/11/13 03:46 AM
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