Glaze3D
From Wikipedia, the free encyclopedia
Glaze3D was a family of graphics cards announced by BitBoys Oy on August 2, 1999 that would have produced substantially better performance than other products available at the time. The family, which would have come in the Glaze3D 1200, Glaze3D 2400 and Glaze3D 4800 models, was supposed to offer full support for DirectX 7, OpenGL 1.2, AGP 4X, 4X anisotropic filtering, full-screen anti-aliasing and a host of other high-end technologies at the time. The 1.5 million transistor GPU would have been fabricated by Infineon on a 200nm process (later reduced to 170nm[1]), with a minimum of 9MB of embedded DRAM, 128-512MB VRAM and a maximum supported video resolution of 2048x1536 pixels. -- This transistor figure makes no sense, though. It was advertised by Bitboys as needing only 6 million logic gates. The most common gate type in logic is a NAND gate which takes 4 transistors, so by this rule of thumb the chip would have sported about 24 million or more transistors for logic. Add to this over 75 million (considerably denser) transistors for the eDRAM: one transistor and one capacitor per bit for 72 Mb (9 MB), plus the extra redundancy to ensure good yield even with small lithography defects, as is usually done for the dense but easily duplicated memory portions on chips. Thus, a probable figure for the Glaze3D chip is about 100 million transistors; it certainly didn't help discussions on amateur forums that Bitboys uncommonly talked about gate counts, never transistor counts, even when asked in interviews.
Contents |
[edit] Development History
The Glaze3D family of cards were developed in several generations, beginning with the original Glaze3D "400" with multi-channel RDRAM instead of internal eDRAM. This was offered only as IP but with no takers. Bitboys revised the design and decided to have it manufactured themselves, in cooperation with Infineon Technologies, the chip fabbing arm of Siemens. They came up with a new Glaze3D pitched for release in Q1, 2000. The card promised extremely high performance compared to contemporary chips. As bug-hunting, validation and manufacturing problems delayed the launch, new features became necessary and a DX7 variant with built-in hardware Transform & Lighting was announced, but never appeared.
The GPU was later redesigned under a new codename, Axe, to take advantage of DirectX 8 and compete with a developing competition. The new version sported such features as an additional 3MB eDRAM, proprietary Matrix Antialiasing and a vastly improved fillrate, as well as offering a programmable vertex shader and widened internal memory bus. The new card was to have been released as Avalanche3D by the end of 2001.
The third development, codenamed Hammer, started development as Axe lost viability toward the end of 2001. This new card was to be a high-end DirectX 9 part, offering new features such as occlusion culling, improved rendering performance and various other innovations. This version, like the ones before it, never shipped commercially.
Bitboys turned to mobile graphics and developed an accelerator licensed and probably used by at least one flat panel display manufacture, although it was intended and designed primarily for higher-end handhelds. Later on ATI bought Bitboys for an extra research and development unit, so as of 2008 Bitboys is owned by AMD.
[edit] Performance Claims
The Glaze3D family was well-known for the bold performance claims that were associated with it. The low-end 1200 model was purported to achieve a fillrate of 1.2 billion texels per second, with a geometry throughput of 15 million triangles per second. Most importantly, the card was originally claimed to achieve over 200 frames per second in id Software's Quake 3 at maximum visual quality.[2]
The 1200 model's claimed specifications would place it as the rough equivalent of the GeForce FX 5200 Ultra or Radeon 9200 Pro, while its claimed performance would place it at the same level as the GeForce 3 Ti 500 or Radeon 8500. To compound matters, the cards' specifications were later updated to nearly double their original performance levels.
While the Glaze3D 1200 was supposed to achieve unheard of performance in video games, it was claimed that the 2400 and 4800 models would each be substantially more powerful in turn. Using two and four GPU configurations respectively, and including an additional geometry accelerator on the 4800, the higher-end Glaze3D cards were to be aimed at the very highest end of the video gaming market.[2]
[edit] See also
[edit] References
- ^ Steve Gibson. Glaze3D in 2001. Retrieved on 2006-06-11.
- ^ a b BitBoys Oy. BITBOYS OY UNVEILS GLAZE3D PRODUCT FAMILY. Retrieved on 2006-06-11.
[edit] External links
- Glaze3D Announced
- PDF version of a presentation by Petri Norlund, Chief Architect at BitBoys Oy in 1999.
- BitBoys at Siggraph - analysis of the Glaze3D cards.
- A Look Inside BitBoys - a detailed description of the development history of Glaze3D.
