Ah, 3DMark. These scores are provided with no guarantee that they are useful at all. Since I don't perform my own benchmarks on every card, I am limited to what I find on the internet. Since I don't get all my scores from one source, you'll often see some inconsistencies with 3DMark scores. I try to keep things up to date, and I try to use scores based on the same drivers and using the same processor, but it's not always possible.
I hope to provide better information here at some point in the future.