 The POVray test was executed by rendering a chess set (available in our Downloads section) at 1024x768, with an anti-aliasing factor of 0.3. Here the SiS 645 outperforms the other chipsets in both DDR266 and DDR333 mode, a somewhat unusual showing as the 645 had been lagging the other DDR266 contestants thus far. The P4X266 seems to have some issues with this application, as it comes out just ahead of the PC133-equipped i845.
 SPECviewperf is a portable OpenGL performance benchmark program which provides a vast amount of flexibility in benchmarking OpenGL performance. The SPECviewperf suite consists of 6 viewsets, each corresponding to a particular application, eg. Intergraph's DesignReview (DRV), IBM's Data Explorer (DX) and Alias/Wavefront's Advanced Visualizer. In the Alias/Wavefront viewset, all three DDR chipsets are virtually on par, with the SiS 645 pulling ahead by a healthy 5% when operated in DDR333 mode.
 In the remaining viewsets, the 645's additonal bandwidth when operated in DDR333 mode doesn't really buy it any performance advantages, at the most 1%, which is well within the benchmark's margin of error. The Intel 845 is exhibits very competitive performance here, second only to the DDR333-equipped 645. Here however, the P4X266 seems to lag by 6% to 9% behind.
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