BM Seer Unofficial thoughts from an anonymous Sun employee

HP DL580 G5 4 QC Xeon 2.93GHz real watts and lots of 'em

Wednesday Jan 09, 2008

It is so easy to measure you wonder why some vendors hide their wattages. Sun as US T2:
2007: UltraSPARC T2
2005: UltraSPARC T1 & T2000 blogs with power-performance

The only thing I can think of is that the numbers are embarrassing in real configurations.

I a previous posting I mentioned that HP configurations used in other benchmarks have reasonable sized memory:
64GB: HP DL580 G5 (4 quad-core Xeon 2.933GHz)
64GB: HP DL585 G2 (4 dual-core Opteron 3GHz)
32GB: HP DL380 G5 (2 quad-core Xeon 2.66GHz)
32GB: HP DL380 (2 quad-core Xeon 3GHz)
32GB: HP BL685c (4 dual-core Opteron 3GHz)
32GB: HP BL460c (2 quad-core Xeon 3GHz)

Looking around at HP's own power calculators we find that an HP DL580 G5 with four QC Xeon 2.93GHz Tigerton and 64 GB memory should draw 1,072watts but how much does is actually draw? We carefully measured one in our lab running database workloads at 60-80% util at just above 800watts. Fair, NO gaming. It is so easy to do this right, try it yourself.

    Note:HP configures 1200w supplies with their 4 Xeon QC DL580 G5. Everyone knows that even with efficient power supplies you design near the rating so that you keep the costs down and keep the efficiency up. An engineer would be a bit daft to put a 1200w supply on a server they expect to draw only 300watts! :)

HP DL580 G5 power consumption from HP Power Calculator system configured with 4 x2.93GHz processors, redundant PSU, 16 x 4GB DIMMs, two GbE, four 146GB SAS disks, two PCI-E Dual-Port FC, 80% utilisation on 1/8/07: http://h30099.www3.hp.com/configurator/powercalcs.asp

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Comments:

You missed something really funny. The 1.86GHz 50W processor they used in the SPECpower_ssj2008 benchmark costs $1400 more (EACH!) than a 2.13GHz 80W processor. I figure it would take 53 years at 100% utilization at 10 cents per KWH to pay for that difference, plus you're running a little slower system. Check my math...

Posted by Moneybags on January 15, 2008 at 04:21 PM PST #

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