GeForce GT 440 3GB vs GeForce GTX 470

Intro

Compare all of that to the GeForce GTX 470, which comes with GPU core speed of 607 MHz, and 1280 MB of GDDR5 memory running at 837 MHz through a 320-bit bus. It also is comprised of 448 Stream Processors, 56 Texture Address Units, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce GTX 470		215 Watts
	Difference: 159 Watts (284%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 470 should in theory be a lot superior to the GeForce GT 440 3GB in general. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 90720 (210%)

Texel Rate

The GeForce GTX 470 should be quite a bit (about 138%) faster with regards to texture filtering than the GeForce GT 440 3GB. (explain)

GeForce GTX 470		33992 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 19736 (138%)

Pixel Rate

The GeForce GTX 470 should be much (about 70%) better at anti-aliasing than the GeForce GT 440 3GB, and should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GT 440 3GB		14256 Mpixels/sec
	Difference: 10024 (70%)

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 (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.