GeForce 9800 GT 512MB vs GeForce GTX 570

Intro

Compare all of that to the GeForce GTX 570, which comes with core clock speeds of 732 MHz on the GPU, and 950 MHz on the 1280 MB of GDDR5 memory. It features 480 SPUs as well as 60 Texture Address Units and 40 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce GTX 570		219 Watts
	Difference: 114 Watts (109%)

Memory Bandwidth

Performance-wise, the GeForce GTX 570 should in theory be much superior to the GeForce 9800 GT 512MB overall. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 94400 (164%)

Texel Rate

The GeForce GTX 570 is a lot (approximately 31%) more effective at anisotropic filtering than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 10320 (31%)

Pixel Rate

The GeForce GTX 570 will be quite a bit (about 205%) better at full screen anti-aliasing than the GeForce 9800 GT 512MB, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 19680 (205%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.