ATI's Midrange Rebuttal: Radeon X1800GTO
As stated earlier, ATI did not want to lie down when they had the opportunity to take a shot at the midrange newcomer. In response to the GeForce 7600GT, ATI has unleashed the X1800GTO. This new chip is like their previous GTO classification chips. Like the Radeon X800GTO, the X1800GTO is designed around a scaled down version of an existing chip. In this instance, it uses the R520.
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| ATI Radeon X1900, X1800, & X1600 Specifications | |||||
|---|---|---|---|---|---|
| Row 0 - Cell 0 | X1900XTX | X1900XT | X1800XT | X1800GTO | X1600XT |
| Process Technology | 90nm | 90nm | 90nm | 90nm | 90nm |
| Number of Transistors | 384M | 384M | 321M | 321M | 157M |
| Core Clocks (Vertex, Core) in MHz | 650/650 | 625/625 | 625/625 | 470/430 | 440/400 |
| Memory Clock (MHz / data rate) | 775/1550 | 725/1450 | 750/1500 | 500/1000 | 690/1380 |
| Vertex Shaders (#) | 8 | 8 | 8 | 8 | 8 |
| Pixel Shaders (#) | 48 | 48 | 16 | 12 | 12 |
| ROPs (#) | 16 | 16 | 16 | 16 | 16 |
| Texture units | 16 | 16 | 16 | 16 | 4 |
| Frame Buffer Size | 512 MB | 256 MB | 512 MB | 256 MB | 256 MB |
| Memory Bandwidth (GB/sec) | 49.6 | 46.4 | 48 | 32 | 44.16 |
| Vertices/Second (Millions) | 1300 | 1250 | 1300 | 940 | 880 |
| Pixel Fill Rate (# ROPs x clk) in Billions/sec | 10.4 | 7.2 | 8.8 | 6.88 | 6.4 |
| Texture Fill Rate (# Texture units x clk) in Billions/sec | 41.6 | 40 | 10 | 7.52 | 28.16 |
| RAMDACs | 400 MHz | 400 MHz | 400 MHz | 400 MHz | 400 MHz |
| Bus Technology | PCI Express | PCI Express | PCI Express | PCI Express | PCI Express |
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