GeForce GTX 460 2GB vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which comes with GPU core speed of 863 MHz, and 3072 MB of GDDR5 memory running at 1502 MHz through a 384-bit bus. It also is made up of 2304 SPUs, 192 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should be 150% faster than the GeForce GTX 460 2GB in general, due to its greater bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 460 2GB		115200 MB/sec
	Difference: 173184 (150%)

Texel Rate

The Geforce GTX 780 is much (more or less 338%) better at AF than the GeForce GTX 460 2GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 127896 (338%)

Pixel Rate

The Geforce GTX 780 should be a lot (approximately 92%) faster with regards to AA than the GeForce GTX 460 2GB, and will be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 19824 (92%)

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 maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video 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 Raster Operations Pipelines by the clock 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.