BM Seer Unofficial thoughts from an anonymous Sun employee

Truth on Woodcrest wattage

Thursday Nov 02, 2006

Getting the truth out on Woodcrest. BM Seer getting top ranking in google on woodcrest and watts. A search for "woodcrest wattage" and "Woodcrest watts" gets top two entries. Even a google search for "woodcrest" gets the BM Seer blog entry in at #27.

Seems lots of people are surprised that a 32GB 2 Woodcrest server draws a hefty 510 watts - which is an awful lot in 2RU. Why didn't the Woodcrest vendors just publish this at product launch? Global information age means the info will get out. Transparency is what Jonathan, CEO of Sun Microsystems, always talks about.

...added note Xray's comment is such FUD, 430 watts was measured with almost no disk on a real workload on only a 16GB woodcrest -- simply put, woodcrest wastes 100watts more than a 32GB T2000, and 2x more watts than a T1000. Woodcrest supporters offer no measured wattage on 16GB or 32GB systems, but try to undermine the facts...
If you have a woodcrest measure the watts and post them, clearly woodcrest vendors don't want you to know.

    Woodcrest 16GB 430 watt measured:

Dell 2950
2 x 3GHz Woodcrest Xeon 5160 (4MB L2 cache)
16GB = 8 x 2GB DIMM;
one 73GB 15K rpm SAS (disk idle)
1.333MHz FSB
PERC 5/i, x6 Backplane Integrated Controller Card
QLogic 2462 Dual Channel 4GB Optical FC HBA PCI-E
OS: SuSE - SLES
all bios settings correct

[3] Comments
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Comments:

BM, Here are some more Woodcrest numbers for you: http://www.realworldtech.com/page.cfm?ArticleID=RWT110706025321

Posted by Wes Felter (IBM Research) on November 07, 2006 at 11:50 AM PST #

Wow really *really* small memory at 4GB.

Pretty unrealistic.

Posted by BM Seer on November 07, 2006 at 04:51 PM PST #

At least those measurements are fully documented as to configuration, as opposed to the numbers you quote from some blog posting from a random person with no documentation. Do you really believe that an extra 28GB will add 260 watts? More like 50 or 60 watts - in which case the 32GB Woodcrest system is under the T2000. Oh no Mr. Bill!!!! Splat!

Posted by Xray on November 07, 2006 at 08:27 PM PST #

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