GeForce 8800 GTS (G80) 640MB vs Geforce GTX 760

Intro

Compare all of that to the Geforce GTX 760, which has a core clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1152 SPUs, 96 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB		143 Watts
Geforce GTX 760		170 Watts
	Difference: 27 Watts (19%)

Memory Bandwidth

Performance-wise, the Geforce GTX 760 should in theory be quite a bit better than the GeForce 8800 GTS (G80) 640MB overall. (explain)

Geforce GTX 760		192256 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 128896 (203%)

Texel Rate

The Geforce GTX 760 is much (more or less 282%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Geforce GTX 760		94080 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 69456 (282%)

Pixel Rate

The Geforce GTX 760 should be quite a bit (more or less 206%) faster with regards to full screen anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and will be capable of handling higher resolutions without slowing down too much. (explain)

Geforce GTX 760		31360 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 21100 (206%)

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 MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.