GeForce GT 240 GDDR5 vs GeForce GTX 570

Intro

Compare those specs to the GeForce GTX 570, which features a GPU core clock speed of 732 MHz, and 1280 MB of GDDR5 memory running at 950 MHz through a 320-bit bus. It also features 480 SPUs, 60 TAUs, and 40 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce GTX 570		219 Watts
	Difference: 149 Watts (213%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 570 should be 179% faster than the GeForce GT 240 GDDR5 overall, due to its higher data rate. (explain)

GeForce GTX 570		152000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 97600 (179%)

Texel Rate

The GeForce GTX 570 is much (about 150%) better at anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 26320 (150%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 570 is the winner, by a large margin. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 24880 (565%)

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 max amount of data (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.