ATI Radeon X1900 XTX vs HIS Radeon X1900 XT IceQ 3 (H190XTQ512DVN)

The maximum pixel fillrate is calculated as the number of ROPs (Raster Operations Pipelines), multiplied by graphics clock. The Radeon X1900 XTX has a insignificant advantage in this area, as it runs at insignificantly higher frequency, and both GPUs have the same number of ROPs. Better pixel fill rate allows more pixels to be drawn on screen per second, which results in increased performance, unless there are bottlenecks somewhere else.

Because two graphics cards have the same number of Texture Mapping Units (TMUs) and the ATI Radeon X1900 XTX card is clocked a bit higher, its texture fillrate is insignificantly higher. Better texture fill rate means that the GPU can apply more textures and/or use more complex 3D effects for each texel, which improves visual appearance of games and generated images.

Memory bandwidth parameter tells how much memory (in Gigabytes) the graphics card can read from or write to dedicated memory per second. GPUs with higher memory bandwidth have better performance at high display resolutions, or when using large and detailed textures, and/or utilizing complex 3D effects and filters, like anti-aliasing. The bandwidth is dependent on several components, such as memory type, speed, and memory interface width. Specifically, the ATI Radeon X1900 XTX graphics card comes with higher clocked memory. Consequently, it has more memory bandwidth.