By: EduardoS (no.delete@this.spam.com), November 9, 2008 5:14 pm
Room: Moderated Discussions
Joe Chang (jchang6@Xyahoo.com) on 11/9/08 wrote:
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>Inquirer points out the SPEC Power results posted by AMD for Shanghai and Penryn (Xeon L5420) both at 2.5GHz.
>AMD results for Shanghai is 731 versus 561 for Xeon.
>SPEC Power results posted by others for the L5420 were higher, the SuperMicro results
>being 990, but not as close a system match as the 2 AMD results (Windows instead of Linux, and BEA vs Oracle).
>Now SPEC Power is not my field, as I have never run it. Inquirer points out the
>different memory config. However in reading through the reports, AMD has the Xeon
>L5420 system power at 179, 197 and 279W for idle, 10% and 100% respectively. The
>SuperMicro result has 97, 108 and 174W respectively. I do not think 2 DIMMs will
>make up 100W, The difference in the SuperMicro result includes settings:
>Adjacent Sector Prefetcher disabled in BIOS.
>C1 Enhanced Mode enabled in BIOS.
>3pin Server Mode enabled.
Note that for the best results for Xeon the chipset used was the 5100, not the traditional X5000, and configured as 2x4GB instead of 8x2GB, also remember that 5100 use registered DDR-2 and the X5000 FB-DIMMs, other submissions with the X5000 and same amount of chips chipset have almost the same power consumption as AMD's submission.
Regarding to real life systems and configurations, DL380 is the best seller of HP, and use the X5000 chipset, not 5100, the last one is very limited so ofen it's avoided, replacing the 8x2GB for 4x4GB modules costs $202, for the LP versions it's $442 in HP web site, both are reasonable prices in my opinion but I would go for 8x4GB instead of saving a few Watts with DIMMs.
On the other side the Opteron submission use a standard power version, not an (good mostly for power efficiency benchmarks) HE version.
From a power effiency perspective these submission just proves (again) that FB-DIMMs sucks, doens't trust on this benchmark for reducing your power bill.
But they give a preview of Shangai's performance on SpecJBB 2005, 338,577 isn't bad at all.
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>Inquirer points out the SPEC Power results posted by AMD for Shanghai and Penryn (Xeon L5420) both at 2.5GHz.
>AMD results for Shanghai is 731 versus 561 for Xeon.
>SPEC Power results posted by others for the L5420 were higher, the SuperMicro results
>being 990, but not as close a system match as the 2 AMD results (Windows instead of Linux, and BEA vs Oracle).
>Now SPEC Power is not my field, as I have never run it. Inquirer points out the
>different memory config. However in reading through the reports, AMD has the Xeon
>L5420 system power at 179, 197 and 279W for idle, 10% and 100% respectively. The
>SuperMicro result has 97, 108 and 174W respectively. I do not think 2 DIMMs will
>make up 100W, The difference in the SuperMicro result includes settings:
>Adjacent Sector Prefetcher disabled in BIOS.
>C1 Enhanced Mode enabled in BIOS.
>3pin Server Mode enabled.
Note that for the best results for Xeon the chipset used was the 5100, not the traditional X5000, and configured as 2x4GB instead of 8x2GB, also remember that 5100 use registered DDR-2 and the X5000 FB-DIMMs, other submissions with the X5000 and same amount of chips chipset have almost the same power consumption as AMD's submission.
Regarding to real life systems and configurations, DL380 is the best seller of HP, and use the X5000 chipset, not 5100, the last one is very limited so ofen it's avoided, replacing the 8x2GB for 4x4GB modules costs $202, for the LP versions it's $442 in HP web site, both are reasonable prices in my opinion but I would go for 8x4GB instead of saving a few Watts with DIMMs.
On the other side the Opteron submission use a standard power version, not an (good mostly for power efficiency benchmarks) HE version.
From a power effiency perspective these submission just proves (again) that FB-DIMMs sucks, doens't trust on this benchmark for reducing your power bill.
But they give a preview of Shangai's performance on SpecJBB 2005, 338,577 isn't bad at all.
