Radeon R100
 |
|
| Release date | 2000-2001 |
|---|---|
| Codename | Rage 6C |
| Architecture | Radeon R100 |
| Fabrication process and transistors | 30M 180nm (R100) 30M 180nm (RV100) |
| Cards | |
| Entry-level | 7000 VE, LE |
| Mid-range | 7200 DDR, 7200 SDR |
| High-end | VIVO, VIVO SE 7500 LE |
| Enthusiast | 7500 |
| API support | |
| Direct3D | Direct3D 7.0 |
| OpenGL | OpenGL 1.3 (T&L) |
| History | |
| Predecessor | Rage Series |
| Successor | Radeon 8000 Series |
| CPU supported | Mobile Athlon XP (320M IGP) Mobile Duron (320M IGP) Pentium 4-M and mobile Pentium 4 (340M IGP, 7000 IGP) |
|---|---|
| Socket supported |
Socket A, Socket 563 (AMD) Socket 478 (Intel) |
| Desktop / mobile chipsets | |
| Performance segment | 7000 IGP |
| Mainstream segment | 320 IGP, 320M IGP 340 IGP, 340M IGP |
| Value segment | 320 IGP, 320M IGP (AMD) 340 IGP, 340M IGP (Intel) |
| Miscellaneous | |
| Release date(s) | March 13, 2002 (300/300M IGP) March 13, 2003 (7000 IGP) |
| Successor | Radeon 8500/9000/9100 IGP |
The Radeon R100 is the first generation of Radeon graphics chips from ATI Technologies. The line features 3D acceleration based upon Direct3D 7.0 and OpenGL 1.3, and all but the entry-level versions offloading host geometry calculations to a hardware transform and lighting (T&L) engine, a major improvement in features and performance compared to the preceding Rage design. The processors also include 2D GUI acceleration, video acceleration, and multiple display outputs. "R100" refers to the development codename of the initially released GPU of the generation. It is the basis for a variety of other succeeding products.
The first-generation Radeon GPU was launched in 2000, and was initially code-named Rage 6 (later R100), as the successor to ATI's aging Rage 128 Pro which was unable to compete with the GeForce 256. The R100 was built on a 180 nm semiconductor manufacturing process. Like the GeForce, the Radeon R100 featured a hardware transform and lighting (T&L) engine to perform geometry calculations, freeing up the host computer's CPU.
With respect to the 3D hardware within Radeon, the processor can write 2 pixels to the framebuffer and sample 3 texture maps per pixel per clock. This is commonly referred to as a 2×3 configuration. Of Radeon's competitors, the 3dfx Voodoo 5 5500 is a 4×1 design and the GeForce2 GTS is 4×2. Unfortunately, the third texture unit did not get much use in games during the card's lifetime because software was not frequently performing more than dual texturing.
Radeon also introduced a new memory bandwidth optimization and overdraw reduction technology called HyperZ. It basically improves the overall efficiency of the 3D rendering processes. Consisting of 3 different functions, it allows the Radeon to perform very competitively compared to competing 2 and 4 pipeline designs.
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