Home > Features > Product Review: AMD-ATi Radeon X1900

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Scenario 3 - OpenGL Geometry-heavy model in SketchUp 6

This is the original SketchUp mode in test scenario 2, here in SketchUp, used again to evaluate performance. .

07 - Scenario 3: Scene 1

On these last two tests, while the scores are very close, the framerate for the Nvidia GeForce 7300 GT was estimated to be about half that of the ATi X1900 XT.

Performance Analysis and Final Comments

As can be seen from the Scene 1 test, in a 'typical' architectural scene the ATi showed a clean pair of heels to the GeForce 7300 GT. Speedups of around 25-30 % were common on such scenes when substituting the X1900 XT. Substituting scenes of a similar complexity showed that this was the sort of speed-up that we could expect across the board. Certainly, the X1900 XT was able to move through certain of our test scenes in real time.

The second two scenes were, admittedly, untypical and were purposely chosen to be geometry heavy with no textures or lights, to see if the card could produce a speed-up when the defining characteristic of the scene is its number of vertices. In this situation, the speedup for the X1900 XT is less marked. However, there are some caveats: while the overall time taken to complete a camera cycle animation was largely unchanged, the performance of the GeForce 7300 was marked by a tendency to drop frames – typically a framerate reduction of around 50% was noted in comparison to the X1900 XT. This is a function of the ATi card's much greater throughput – a maximum memory bandwidth of around 40 GB/s against the GeForce's 11 GB/s.

Now numbers are all very well, but the question of how the card feels in everyday use is equally as important. Sitting back and pressing play on an animation then timing the results is not the same as orbiting, panning and zooming intensively in SketchUp. The latter 'feel' is much more difficult to quantify, but we would have to say that using the ATi, you feel as though you have more 'breathing space'. While on the models that we were using, the GeForce was on its limit, the X1900 still had plenty of overhead left. We tested this by the thoroughly unscientific method of simply duplicating the current model and orbiting it. With the ATi card we were able to get around four to six copies of complex models easily – and rotate and zoom without going to wireframe – while the GeForce would struggle with just two. --- TIM DANAHER, Associate Editor.

For more information on ATi Radeon X1900 XT go to:

Published: 2 Julyl 2007


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Related Review Article: Addendum - Silencing the X1900 XT


Home > Features > Product Review: AMD-ATi Radeon X1900




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