OK. For example HD4870x2 in 3dmark vantage.
So, here I took this result:
http://hwbot.org/hardware.statistics.do?applicationId=17#chart
- 16098.74
and here I saw another result, slightly different:
http://hwbot.org/browseHardwareVideoCards.do?gpuFamilyId=179
- 15976.562
So I wonder what's the difference, because as I guess they are the average results from all benchmark scores.