Radeon X800 GT
Contrary to initial rumors that the cards would be based on the R430 chip (0,11 micron process technology), in the end, it was the R423 and R480 stocks that were used for these boards. On the eve of the announcement of a new generation chip from ATI - R520 - and its younger modifications, this move looks quite logical.
In addition, the originally expected GPU clock speed has been increased to 475MHz, which would be an insurmountable threshold for a 0,11 micron chip without using a low-k R430. But for the R423/R480, this frequency is just right, and even with a certain margin, because the RX8x0 XT boards (especially PE) initially operated at a higher frequency.
Thus, the chip potentially had 16(!) pixel pipelines. Only 8 of them were activated, but this in no way excluded the possibility of unlocking them (or at least part of them).
Another significant advantage of the X800GT is the exchange bus with 256Bit memory.
Characteristics of ATI Radeon X800 GT
| Name | Radeon X800 GT 128MB |
| Core | R423 / R480 |
| Process technology (µm) | 0.13 (low-k) |
| Transistors (millions) | 160 |
| Core frequency | 475 |
| Memory operating frequency (DDR) | 350 (700) |
| Bus and memory type | GDDR1-2 256 Bit |
| Bandwidth (Gb/s) | 22,4 |
| Pixel pipelines | 8 |
| TMU on conveyor | 1 |
| Textures per beat | 8 |
| Textures per pass | 8 |
| Vertex conveyors | 6 |
| Pixel Shaders | 2.0b |
| Vertex Shaders | 2.0b |
| Fill Rate (Mpix/s) | 3800 |
| Fill Rate (Mtex/s) | 3800 |
| DirectX | 9.0b |
| Anti-Aliasing (Max) | MS-6x |
| Anisotropic Filtering (Max) | 16x |
| Memory Capacity | 128 |
| Interface | PCI-E |
| RAMDAC | 2 x 400 |