Deeko, yep the score is actually a little pointless as there are many different variations in performance which could give the same score (for example a card could be great at something which isn't important and bad at the rest, while another could be a good all-round card and both get the same score).
But 3DMark itself is not a bad test. If you ignore the main score and look at the other information like fill-rate, polygon throughput, texture rendering speed, etc. This is where the real information is.