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ATI's Midrange Rebuttal: Radeon X1800GTO

ATI and Nvidia's Same-Day Mega-Launch Mayhem
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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.


ATI Radeon X1900, X1800, & X1600 Specifications
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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