In the pipeline An important attribute to look out for in a graphics card is the number of pixel pipelines, which are also called pixel processors or pixel shaders.
Usually though, they are simply referred to as “pipelines.”
When you fire up a 3D game, the GPU executes a series of instructions to apply textures and transformations to the pixels that form your screen image.
This series of instructions is called a pipeline, and current GPUs have multiple pixel pipelines operating in parallel.
In general, the more pipelines the GPU has, the faster it will be able to render an image.
In future graphics cards the number of shader units will also be an important specification to check, but for now, you can still judge the performance of current GPUs by the number of pixel pipelines they have.
Mainstream cards have eight or 12 pipelines, high-end cards usually have 16 pipelines, while the ultra high-end cards have up to 24 pipelines.
On the other hand, entry-level cards have only two or four pipelines.
While higher clock speeds are important, you could get more performance if you choose a card with more pipelines over one that has a faster clock speed.
Take for example, the Radeon X1300 Pro, which runs at 600MHz and has four pipelines, and compare it with the Radeon X800 XL, which runs at 400MHz and has 16 pipelines.
A less-informed user might think the Radeon X1300 Pro is faster, but in fact the Radeon X800 XL beats it by a wide margin due to its higher number of pipelines.