Old Graphic card & New compared

My old graphic card, x1300, months ago it got burned coz 1 of the clips holding the fan came off. Only got 2 clips. 1 came off, so d fan left hanging, not touching the GPU and my GPU effectively got burned due to excessive heat. Bought a new GC, HD2400XT from lowyat. These 2 days, tested it with NFS: Carbon. I thought HD2400Xt is supposed to be better than X1300, but my game experience sucks. Personally i feel last time using x1300, the graphic looks much more crystal. I can push most of the graphic to medium or high to produce crystal reflective images on the car. But this new card, the graphic just looks so blocky although with anti-aliasing. Below is a table which i compared the both GC spec. Overall 2400 is better than 1300, but why do I feel its just doesn’t up to my expectation.