ATI Radeon 7000 vs PNY Verto Vanta PCI (VCVTAP16SPB)

In spite of lower graphics frequency, the Verto Vanta PCI has better pixel fill rate, thanks to twice as many Raster Operations Pipelines (ROPs). Having higher pixel fillrate allows the GPU to draw more pixels on screen and off screen, which is beneficial for some 3D effects in games, or when playing at higher display resolutions.

The ATI Radeon 7000 card has many more TMUs (Texture Mapping Units) than the PNY Verto Vanta PCI. On top of that, its graphics clock is considerably higher, thus it has much higher texture fillrate. Better maximum texture fill rate allows the GPU to map more textures and/or use more complex 3D effects for each textured picture element, which improves games visual appearance.

To speed up processing, the GPUs store 3D scene data, textures and intermediate data, used for image generation, in on-board memory. The video memory usually has much higher bandwidth than system RAM, and more bandwidth allows the graphics card to run at higher screen resolutions, use larger and more detailed textures, and apply more complex 3D effects and filters. The bandwidth is dependent on several components, such as memory type, speed, and width of memory interface. In this case, higher memory bandwidth of the ATI Radeon 7000 GPU is due to higher memory clock.