GeForce 9400 GT 256MB vs GeForce GTX 570

Intro

Compare that to the GeForce GTX 570, which uses a 40 nm design. nVidia has set the core frequency at 732 MHz. The GDDR5 RAM runs at a speed of 950 MHz on this specific card. 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 9400 GT 256MB		50 Watts
GeForce GTX 570		219 Watts
	Difference: 169 Watts (338%)

Memory Bandwidth

The GeForce GTX 570, in theory, should perform quite a bit faster than the GeForce 9400 GT 256MB in general. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 139200 (1088%)

Texel Rate

The GeForce GTX 570 should be a lot (about 898%) better at texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 39520 (898%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 570 is superior to the GeForce 9400 GT 256MB, by a large margin. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 27080 (1231%)

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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.