Kai;1637858 said:There is no such thing as 'written for nVidia instruction sets' - there are only two ways to code for graphics cards: DirectX or OpenGL. When you code a game, you write it with one library in mind - not both. As both ATI and nVidia cards support OpenGL and DirectX, the only difference is how these two differing architectures process the data (down entirely to the drivers you use). Some features will be supported in hardware on one card, that another might not have - nVidia took an age to get into the DX10 game, preferring not to concentrate on features, but simple brute force. nVidia really are making crap right now. The fermi architecture is hot, power hungry and not brilliantly efficient. AMD/ATI aren't the king of brute force with the current gen (although we'll see when the 69x0 series is released in a week or two), but they do provide 90% of the power, for less money. They also use less power, and run cooler. AMD/ATI have a much, much better midrange selection than nVidia currently, and a lot of nVidia's recent releases were merely renamed G92 GPU's (G92 = 8800GTS-512, 9800GTX, GTS250 etc) as they didn't have anything they could put on the table :/
I buy cards not for their brand, but the features they provide at a given price point, and the relative performance they offer. I'd rather buy a Radeon 6850 than an GTX460.
It seems I stand corrected then. I was always under the impression that certain games were written to take advantage of the Nvidia chipsets over the ATI cards, especially since a lot of those games (stating 'designed for Nvidia') got better performance with Nvidia cards than the ATI equivalents. I thought it had something to do with the games being written to utilize the specific instruction sets/card technologies.
Truth be told, I've usually been an 'ATI guy', but my last desktop build I got my hands on an Nvidia card for , so I built around that...plus I thought I'd try out the whole 'sli' craze...lol. I have heard though that SLI has been outperforming Crossfire (unless that's changed recently).