Weitek dominated PC 2D graphics accelerator performance for a while in the 90s, but they also suffered from 3dfx's problem of poor VGA compatibility. So they hired me to help design a new VGA core from scratch. Apparently, we did that well, but it was too late, since 3D came and they completely missed that boat because of financial problems preventing them from hiring 3D savvy talent. They were also very well known for having the fastest math co-processors in the 386 PC days. The 486 killed that business though. Another thing they made was a faster (2x speed) Sun Sparc processor that they sold successfully as an upgrade for a while. The company's last profitable quarter was when they did the nVidia license deal.

I remember the FPU for the i386 being considered pretty amazing (I was just a kid at the time), and also their add-on FPU for Suns.

Oh, and we invented unified memory architecture when we designed a PC chipset that included onboard 2d graphics and VGA. It was a cool product, but maybe ahead of its time. It was also hard to sell that not being Intel. The architect of that product went to nVidia