GeForce 9800 GTX vs GeForce GTX 570

Intro

Compare those specifications to the GeForce GTX 570, which uses a 40 nm design. nVidia has set the core frequency at 732 MHz. The GDDR5 memory runs at a speed of 950 MHz on this specific model. It features 480 SPUs along with 60 Texture Address Units and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
GeForce GTX 570		219 Watts
	Difference: 79 Watts (56%)

Memory Bandwidth

In theory, the GeForce GTX 570 will be 116% faster than the GeForce 9800 GTX in general, because of its higher data rate. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 81600 (116%)

Texel Rate

The GeForce GTX 570 should be a small bit (about 2%) more effective at anisotropic filtering than the GeForce 9800 GTX. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 720 (2%)

Pixel Rate

The GeForce GTX 570 will be a lot (about 171%) more effective at full screen anti-aliasing than the GeForce 9800 GTX, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 18480 (171%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.