Well, the culprit seems to be the superellipsoid. I one-by-one removed
things from the scene file always seeing a factor of 3 difference. Replace
the superellipsoid by other things and the Opteron is faster in the same
proporation as was seen in benchmark.pov. Rendered at 800x600 with no AA
the example below gives times of 7 sec on the Opteron and 2 sec on the
laptop.

- steve

#include "colors.inc"

camera {
  location <460, 15, 0>
  look_at <0,0,0>
  sky <0,0,1>
}

light_source { <0,1000,1000> color White }

superellipsoid { <1,0.1> scale <120,120,120>
  texture { pigment { color Blue } finish { diffuse 0.9 phong 1 } }
}

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