GeForce GTX 460 2GB vs GeForce GTX 780 Ti

Intro

Compare those specs to the GeForce GTX 780 Ti, which comes with a clock frequency of 875 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It features 2880 SPUs, 240 Texture Address Units, and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB		160 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 90 Watts (56%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 780 Ti should in theory be a lot superior to the GeForce GTX 460 2GB overall. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 460 2GB		115200 MB/sec
	Difference: 220800 (192%)

Texel Rate

The GeForce GTX 780 Ti will be much (approximately 456%) better at anisotropic filtering than the GeForce GTX 460 2GB. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 172200 (456%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 780 Ti is a better choice, by far. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 20400 (94%)

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 information (counted in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the 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 amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.