Re: They tested the HE edition, which is 65W. 65W QC is obviouly going to have much lower frequency than highest clocked, 3.0 GHz DC Opteron with power consumption of some ~120W. Each core consumes roughly 1/4 of the power of the highest clocked DC Opteron.
According to my calculations, and based on the score of 2200 on a system with 8 cores, the clock frequency would have had to been as low as 1.6GHz. This is well below even the HE Opteron, which clocks as high as 2.6GHz.
Re: Why they chose to test low power version, with less than maximum expected performance? I have no idea...
Isn't it obvious...? The lower the performance of the dual core Opteron, the greater the delta between it and Barcelona. The point of the demo was to show Barcelona at 2x (or near 2x) the performance of dual core Opteron, and I believe they did this by underclocking the dual core Opteron to match Barcelona's lower frequency. And why not overclock Barcelona to match the speed of a dual core Opteron HE...? Well, I'll let you come to your own conclusions on that.
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