- investigate Graphic processors: types; speed; cache; address/data bus; two-dimensional (2D) and three-dimensional (3D) processor, eg pixels, polygons, nurbs; speed; graphics memory
Speed – The greater the clock speed, such as 2 GHz vs. 3 GHz does not automatically mean that the later graphics card will have twice the performance. Sometimes 3 GHz clock speeds are slower than 2 GHz if they are based on an inferior GPU architecture.
Type – Older PCs will have Advanced Graphics Port (AGP) type bus slots for installing graphics adapters. Newer PCs have x16 Peripheral Component Interface Express (PCI-E or PCIe) as the standard way to connect the graphics card to the motherboard. PCI-Express offers roughly twice the data transfer rate of 8x AGP, so if you have a choice, use the PCI-E slots.