EduardoS (no@spam.com) on 11/10/08 wrote:
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>Henrik S (henrik.stahl@nospam.oracle.nothanks.com) on 11/10/08 wrote:
>---------------------------
>>Interesting enough, the NEC submission has a higher peak score (288502 vs 267804)
>>despite the fact that it is uses a smaller Java heap and the slower (?) 4 GB DIMMs.
>>This is counterintiutive to me and makes me suspect that the AMD Xeon submission
>>is on a machine with a less optimized BIOS.
>
>Registered DIMMs have a significantly lower latency than FB-DIMMs,

True

>also FB-DIMM's
>latency increase with more DIMMs per channel.
>

Not in this particular case (8 DIMMs=2 DIMMs/channel). The effect starts from 3-4 DIMMs per channel. 2 DIMMs per channel were considered optimal on Blackford. Don't know if the same is true for Seaburg but I don't see why not.