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there were also coprocessor based videocards in the high-end price range of several thousand of dollars. |
source PC Mag 12. Jan 1993 |
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Most of the Windows accelerator video cards were 2d capable fixed function accelerators that got 2d drawing commands and pixel data sent from the CPU and the fixed function run the given command which resulted in a faster drawing of the window.
The lessened burden on the CPU, combined with the smaller data stream needed for the required instructions, resulted in improved performance compared to dumb frame-buffer only based video-cards.<ref>{{cite web|title=PC Mag, Making a Choice in the area of Video technology|url=https://books.google.de/books?id=LIyy_CtozLcC&lpg=PP1&hl=de&pg=PA165#v=onepage&q&f=false}}</ref>
In the high-end professional area a price of several thousands of dollars, there were also coprocessor based video chipsets like the Texas Instrument TMS34020 available that had their own processor which allowed to offload some of the processing data from the CPU to the coprocessor the videocard.
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