GeForce GTX 465 vs Geforce GTX 680

Intro

Compare that to the Geforce GTX 680, which uses a 28 nm design. nVidia has set the core speed at 1006 MHz. The GDDR5 memory works at a speed of 1502 MHz on this specific model. It features 1536 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
GeForce GTX 465		200 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

The Geforce GTX 680, in theory, should be quite a bit faster than the GeForce GTX 465 in general. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 89664 (87%)

Texel Rate

The Geforce GTX 680 is a lot (more or less 382%) better at AF than the GeForce GTX 465. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 102060 (382%)

Pixel Rate

The Geforce GTX 680 will be much (more or less 66%) faster with regards to full screen anti-aliasing than the GeForce GTX 465, and also should be able to handle higher resolutions better. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 12768 (66%)

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 (in units of megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.