GeForce GT 320 vs GeForce GTX 460 2GB

Intro

Compare that to the GeForce GTX 460 2GB, which makes use of a 40 nm design. nVidia has set the core frequency at 675 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this model. It features 336 SPUs as well as 56 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 117 Watts (272%)

Memory Bandwidth

Performance-wise, the GeForce GTX 460 2GB should in theory be much better than the GeForce GT 320 in general. (explain)

GeForce GTX 460 2GB		115200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 89920 (356%)

Texel Rate

The GeForce GTX 460 2GB should be quite a bit (more or less 192%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 24840 (192%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 460 2GB is a better choice, by far. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 17280 (400%)

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 data (in units of megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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