The Chip

The Rage6C core is unlike any other core that ATI has designed. The core is not a refresh of the aging Rage128 core but a new product completely. Not much has changed since the Radeon's announcement in April, but let's review what we already know and see what one item has changed.

For the most part, what ATI said they would deliver with a Radeon card has found its way into the shipping cards. As suspected, the architecture of the chip is .18 micron with two rendering pipelines with three texture units per pipeline for a total output of 6 texels per clock. Having 2 less texels per clock of the GeForce 2 GTS, with its four pipelines and 2 textures per pipe, in theory the Radeon is crippled by these pipelines.

The reason for this is that dual texture games, such as Quake III Arena, will actually end up not using one of the textures in the Radeon's three texture pipeline. The GeForce 2 GTS's pipeline does not encounter this problem in dual texture games since each pipeline is able to use both texture units for rendering.

The tables become turned, however, when a scene being rendered has three or more textures per pixel. In this case, the Radeon's pipeline architecture is capable of using each texture unit in rendering, resulting in one pass per pixel rendered. The GeForce 2 GTS, on the other hand, relies on two of its pipelines to render a single pixel in a three textured game, with one pipeline rendering two textures and a second one rendering the third, leaving the second texture in the second pipeline wasted. Although few games use 3 textures per pixel, ATI is betting on this to become the embraced standard.

The second part to ATI's decision to use a three texture unit pipeline comes from the fact that texels simply do not add speed due to memory bandwidth limitations. This can be seen in the GeForce 2 GTS: while the GPU is capable of pushing out 1.6 gigatexels per second, this fill rate is never seen due to the extensive memory bandwidth limitations encountered.

Index More of the Chip, Part I


View All Comments

  • Thatguy97 - Tuesday, May 5, 2015 - link

    ahh i remember anadtechs jihad against ati

    wow im dating myself
  • Frumious1 - Monday, August 29, 2016 - link

    I don't remember it at all. The only thing I recall is a bunch of whiny ass fanboys complaining when their chosen CPU, GPU, etc. didn't get massive amounts of acclaim. The very first Radeon cards were good, but they weren't necessarily superior to the competition. You want a good Radeon release, that would be the 9700 Pro and later 9800 Pro -- those beat Nvidia hands down, and AnandTech said as much. Reply
  • Essaytigers - Wednesday, June 17, 2020 - link

    essaytigers is a well known best essay writing company. we are here to get the essay editing services for you. we are having the best professional from all over the world. we are here to help you in your exams and theses. we are having team to get your work done.
  • vedantydv123 - Wednesday, May 1, 2019 - link

    I really like this window browser,but you can easily to download for windows i have giving the 4 star for this app,now one a single click here this visit. Reply
  • couponrah - Friday, July 17, 2020 - link

    Best Amazon Product in one Store at Coupon Gift Free
  • piekpaul - Thursday, July 4, 2019 - link

    Its always interesting to compare ATI to NVidia. Thanks for your great videos.
  • Bridgecity - Tuesday, June 16, 2020 - link

    There is no universal rule of thumb to reference while trying to determine when to replace your flooring. This depends on the type of flooring you need to be replaced, the quality of the materials which were used, the quality of the installation process, how you treated the flooring, and so on. Reply
  • Rammafoundation - Tuesday, June 16, 2020 - link

    Ramma foundation is a company and a foundation that provide crack repair snow remove and gutter clean service. We are the crack repair foundation in Alberta Edmonton. We provide services like crack repair, gutter clean services, show removal, in short we are the foundation repair in Edmonton. If you are worried about the cracks on your home do not worry we are here to get it repair. If you are worried about snow on your roof, we can remove it. We are here to clean you gutter. Reply
  • NetworkChampionBook - Wednesday, June 17, 2020 - link

    today i am going to tell you about a book that is known as Network Champion Book. this is the book that can solve all of your provlems if you are suffering from networking issues. this is the book that have ample knowledge regarding netowrking. you should have it in order to cope with the situation.
  • EmiratiCoffee - Thursday, June 18, 2020 - link

    Emirati coffee is a big coffee wholesaler and supplier in UAE provide highest quality speciality coffee beans through direct trade with over 82 coffee producing countries, Emirati Coffee Dubai co-founder and CEO Mohamed Ali Al Madfai first opened the Emirati Coffee Co roastery in 2017 and the coffee shop followed a year later in 2018. Apart from coffee wholesalers, We offer a beautiful indoor or outdoor coffee cart with all equipment and highly skilled baristas to serve at your function or event.

Log in

Don't have an account? Sign up now