The SiS 6326 was a graphics processing unit (GPU) manufactured by Silicon Integrated Systems.

According to a test conducted by Tom's Hardware on January 21, 1998, it possessed roughly a third of the performance of an NVidia RIVA 128 or 40% less than an ATI Rage Pro in terms of frames per second in Direct3D benchmarks, and simply could not play Quake 2 due to its lack of OpenGL support.

[2] Yet the same article says that even the "slow and unknown graphic chip" could still produce "quite nice image quality".

The SiS 6326 was even capable of running relatively newer 3D applications such as 3DMark2001/2001, with no significant image flaws to be found despite its abysmal speed.

There is also an experimental FrameBuffer driver developed by Sergio Costas,[5] currently unsupported, available only for 2.4 kernels and without any kind of hardware acceleration.